Honda-SOHC

SOHC.co.uk Forums => Project Board => Topic started by: martin_uk on December 05, 2014, 05:56:51 PM

Title: CB750K8 Project
Post by: martin_uk on December 05, 2014, 05:56:51 PM
Added a new CB750 to my collection  :)

A US import 1978 K8.

Picked up today.

Engine was out, as PO found seized, various bits missing.

Not tried an import before, have NOVA paperwork.

I can hear Davis Silver rubbing his hands :P

(https://farm8.staticflickr.com/7538/15331114924_a13196eab2_c.jpg) (https://flic.kr/p/pmKYkE)CB750K8 purchased eb (https://flic.kr/p/pmKYkE) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7463/15952729682_0937ef00d1_c.jpg) (https://flic.kr/p/qiFUKu)CB750K8 purchased eb $_57 (https://flic.kr/p/qiFUKu) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm9.staticflickr.com/8616/15951431501_5cb6068a0c_c.jpg) (https://flic.kr/p/qizfR4)CB750K8 purchased eb 1$_57 (https://flic.kr/p/qizfR4) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7531/15951449181_512ae72230_c.jpg) (https://flic.kr/p/qizm6T)007 (https://flic.kr/p/qizm6T) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm9.staticflickr.com/8567/15767382089_5a651a32f1_c.jpg) (https://flic.kr/p/q2iXnk)003 (https://flic.kr/p/q2iXnk) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Title: Re: CB750K8 Project
Post by: Bitsa (Ralph Wright - RIP) on December 05, 2014, 06:52:02 PM
Martin
Forget the other post you have them here.Got some clocks maybe but you can rebuild the ones you have.First impressions not bad seats no big deal whats wrong with the motor?
What bits are missing?
Cheers
Bitsa
Title: Re: CB750K8 Project
Post by: martin_uk on December 05, 2014, 07:33:52 PM
Martin
Forget the other post you have them here.Got some clocks maybe but you can rebuild the ones you have.First impressions not bad seats no big deal whats wrong with the motor?
What bits are missing?
Cheers
Bitsa

Choke cable bracket
Side panels
Front brake master cylinder
Ignition switch and key orig if poss
Tail lamp lens
Headlight brackets with good chrome
Rear grab rail
Instruments
Headlight complete (UK dip) assume same as K7?
Carbs Keihin PD42B
Exhausts
Seat cover
Alternator cover
New cables
Oversize pistons/rings

Any other good K8 bits
Title: Re: CB750K8 Project
Post by: martin_uk on December 05, 2014, 07:39:43 PM
Havnt fully decided the standard I am looking to achieve, as I know these are not so much in demand and I dont like spending more than they are worth, but usually do  :-[

Will certainly get frame and black painted parts powder coated and zinc plate all the sound fittings.
Title: Re: CB750K8 Project
Post by: Bitsa (Ralph Wright - RIP) on December 05, 2014, 08:14:43 PM
Martin
I have a alternator cover not 100 percent but would say 98 though.If the throttle cables are the same for low bars uk have them too one new one used but good chrome.I also have a k7 master cylinder works fine but needs new seals.Instruments have various if you want photos can do tommorrow.Have a complete rear light but lens cracked good condition
Cheers
Bitsa
Title: Re: CB750K8 Project
Post by: martin_uk on December 05, 2014, 08:17:49 PM
Martin
I have a alternator cover not 100 percent but would say 98 though.If the throttle cables are the same for low bars uk have them too one new one used but good chrome.I also have a k7 master cylinder works fine but needs new seals.Instruments have various if you want photos can do tommorrow.Have a complete rear light but lens cracked good condition
Cheers
Bitsa

Thanks Bitsa
Does the K7 master cyl have provision for stop light switch?

Title: Re: CB750K8 Project
Post by: Bitsa (Ralph Wright - RIP) on December 05, 2014, 08:21:18 PM
Martin
No the stop switch is located on the splitter on the lower fork yoke.I have seen this type on the USA eBay site though.
Cheers
Bitsa
Title: Re: CB750K8 Project
Post by: martin_uk on December 06, 2014, 02:20:31 PM
It is out of van and took a closer look.

Some good and bad news  ???

The engine still has its original oil pipe fixing screws (missing from all my other bikes)

(https://farm9.staticflickr.com/8680/15773098749_c9845942c3_c.jpg) (https://flic.kr/p/q2PfJr)2014_1206Kparts0031 (https://flic.kr/p/q2PfJr) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7544/15933354896_192c7f41f8_c.jpg) (https://flic.kr/p/qgYBis)2014_1206Kparts0020 (https://flic.kr/p/qgYBis) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Lots of parts better than expected and rear mudguard chrome is quite good.

Generally seems quite original, but quite a few bits missing.

Thought it was a Black tank, but is in fact a very dark maroon metallic.

(https://farm8.staticflickr.com/7549/15336855294_8614f47b8a_c.jpg) (https://flic.kr/p/pngoKy)2014_1206Kparts0034 (https://flic.kr/p/pngoKy) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7568/15773095799_82ea4d21bb_c.jpg) (https://flic.kr/p/q2PeRz)2014_1206Kparts0037 (https://flic.kr/p/q2PeRz) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Wiring and HB switches very poor, looks like UV damage, the plastic connector housings are crumbling!

(https://farm9.staticflickr.com/8587/15957162581_16b1781600_c.jpg) (https://flic.kr/p/qj5CuM)2014_1206Kparts0039 (https://flic.kr/p/qj5CuM) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7544/15958460952_ab1c8564ef_c.jpg) (https://flic.kr/p/qjchsu)2014_1206Kparts0043 (https://flic.kr/p/qjchsu) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr


Title: Re: CB750K8 Project
Post by: Bitsa (Ralph Wright - RIP) on December 06, 2014, 07:22:22 PM
That is a good base of a restore.You will have a little problem of finding some parts but on the whole done worse than you have.
Cheers
Bitsa
Title: Re: CB750K8 Project
Post by: Trigger on December 06, 2014, 07:29:57 PM
That is a USA or Canadian  import, never available in the UK. Parts are hard to find for the K8 in the UK. Must of got that one cheep. What is the engine Number?
Title: Re: CB750K8 Project
Post by: martin_uk on December 06, 2014, 07:40:40 PM
That is a USA or Canadian  import, never available in the UK. Parts are hard to find for the K8 in the UK. Must of got that one cheep. What is the engine Number?

Its CB750E 30530xxx x =hidden number

Lots of parts seem same,  405 middle part number number for this model
Title: Re: CB750K8 Project
Post by: martin_uk on December 06, 2014, 07:55:42 PM
Started the strip, hoping to have frame etc ready for powder coaters Monday, so can be done before they close for Xmas  :-\

May not work out if too many seized parts, but good to have a goal and something to keep me busy over break!

Just received some parts from cruzinimage (Ebay) from Japan.

Have used before and reasonable for pattern parts.

(https://farm9.staticflickr.com/8574/15339873663_e8bbaba9e8_c.jpg) (https://flic.kr/p/pnwS1p)2014_1206Kparts20112 (https://flic.kr/p/pnwS1p) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7542/15958861812_a388bb9e79_c.jpg) (https://flic.kr/p/qjekBS)2014_1206Kparts20113 (https://flic.kr/p/qjekBS) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm9.staticflickr.com/8576/15337246894_8b78e59320_c.jpg) (https://flic.kr/p/pnipah)2014_1206Kparts20115 (https://flic.kr/p/pnipah) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm9.staticflickr.com/8639/15957548361_7c12a195ee_c.jpg) (https://flic.kr/p/qj7Bba)2014_1206Kparts20114 (https://flic.kr/p/qj7Bba) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm9.staticflickr.com/8571/15773473129_6d9d22293b_c.jpg) (https://flic.kr/p/q2Rb2g)2014_1206Kparts20116 (https://flic.kr/p/q2Rb2g) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Just need to find carbs to go with rebuild kit  :-[

Title: Re: CB750K8 Project
Post by: Trigger on December 06, 2014, 07:57:31 PM
Hi number. Could you put a picture up of a piston from that engine? I want to see if it the same as the F2 ones. The F1 used two types of piston, some are from the early K and the latter ones have a dot instead of the arrow on the crown.
Title: Re: CB750K8 Project
Post by: martin_uk on December 06, 2014, 08:02:17 PM
Some more wiring pics

(https://farm9.staticflickr.com/8600/15933724546_94549ff199_c.jpg) (https://flic.kr/p/qh1vbJ)2014_1206Kparts20111 (https://flic.kr/p/qh1vbJ) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7520/15959500435_68086c7487_c.jpg) (https://flic.kr/p/qjhBsB)2014_1206Kparts20108 (https://flic.kr/p/qjhBsB) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm9.staticflickr.com/8656/15772261638_9d55cd1e0d_c.jpg) (https://flic.kr/p/q2JXTu)2014_1206Kparts20077 (https://flic.kr/p/q2JXTu) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Assume switches started off Black
(https://farm8.staticflickr.com/7504/15933879656_d10e88b000_c.jpg) (https://flic.kr/p/qh2ii3)2014_1206Kparts20074 (https://flic.kr/p/qh2ii3) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Missing fork cap

(https://farm8.staticflickr.com/7475/15337392154_b5763a831f_c.jpg) (https://flic.kr/p/pnj9kL)2014_1206Kparts20079 (https://flic.kr/p/pnj9kL) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Original colour

(https://farm9.staticflickr.com/8602/15773787607_b51cf3b98b_c.jpg) (https://flic.kr/p/q2SMvi)2014_1206Kparts20094 (https://flic.kr/p/q2SMvi) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr
Title: Re: CB750K8 Project
Post by: martin_uk on December 06, 2014, 08:05:17 PM
Hi number. Could you put a picture up of a piston from that engine? I want to see if it the same as the F2 ones. The F1 used two types of piston, some are from the early K and the latter ones have a dot instead of the arrow on the crown.

Parts list shows piston as 131013 392 020  so assume its the F1 type.

Does have a dot on piston, will take some pics
Title: Re: CB750K8 Project
Post by: Bitsa (Ralph Wright - RIP) on December 06, 2014, 08:18:52 PM
Have to say the plastic wire blocks are the worst I have seen Is it because acid have got to them? but I do have the fork bottoms
Cheers
Bitsa
Title: Re: CB750K8 Project
Post by: martin_uk on December 06, 2014, 11:23:48 PM
392 domed piston

(https://farm9.staticflickr.com/8650/15961890862_0d5a7b0de5_c.jpg) (https://flic.kr/p/qjuS3S)2014_1206Kparts30001 (https://flic.kr/p/qjuS3S) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7494/15340270554_636d985f71_c.jpg) (https://flic.kr/p/pnyTZm)2014_1206Kparts30003 (https://flic.kr/p/pnyTZm) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm9.staticflickr.com/8664/15936772876_12cfa6383b_c.jpg) (https://flic.kr/p/qhh8m9)2014_1206Kparts30002 (https://flic.kr/p/qhh8m9) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr
Title: Re: CB750K8 Project
Post by: Trigger on December 07, 2014, 09:17:32 AM
Thanks for that Martin. Those 392 piston's are a little difficult when it comes to finding ring's. If you have any idea who is doing rings for those i would be interested. Cheers
Title: Re: CB750K8 Project
Post by: UK Pete on December 07, 2014, 09:30:11 AM
I thought they took the same rings as the f2
Pete
Title: Re: CB750K8 Project
Post by: Trigger on December 07, 2014, 09:37:14 AM
I thought they took the same rings as the f2
Pete

Same rings as the F2 pete but, hard to find at the right price.
Title: Re: CB750K8 Project
Post by: martin_uk on December 07, 2014, 11:01:18 AM
Thanks for that Martin. Those 392 piston's are a little difficult when it comes to finding ring's. If you have any idea who is doing rings for those i would be interested. Cheers

I got some standard size ones from Davis Silver for my F1 that had same pistons. They were £76 plus vat and P&P for full set, though :'(

Made by NPR and listed as OEM  13011392004P
Title: Re: CB750K8 Project
Post by: UK Pete on December 07, 2014, 12:37:16 PM
Thats the ones they fit k7 and f2, the k8 is virtually the same as k7 so makes it easier when searching for parts
only problem with the rings is they only seem top do standard size
pete
Title: Re: CB750K8 Project
Post by: Trigger on December 07, 2014, 02:27:02 PM
Thanks for that Martin. Those 392 piston's are a little difficult when it comes to finding ring's. If you have any idea who is doing rings for those i would be interested. Cheers

I got some standard size ones from Davis Silver for my F1 that had same pistons. They were £76 plus vat and P&P for full set, though :'(

Made by NPR and listed as OEM  13011392004P

Too rich for me. DSS is well over priced these days. Just did a price check on 10 items from DSS and compared the same items with a German dealer that i use. The result was DSS was £83 more expensive.
Title: Re: CB750K8 Project
Post by: Bitsa (Ralph Wright - RIP) on December 07, 2014, 04:40:28 PM
DSS has all ways been more than most got to pay for the USA warehouse
Cheers
Bitsa
Title: Re: CB750K8 Project
Post by: martin_uk on December 07, 2014, 05:28:56 PM
Thanks for that Martin. Those 392 piston's are a little difficult when it comes to finding ring's. If you have any idea who is doing rings for those i would be interested. Cheers

I got some standard size ones from Davis Silver for my F1 that had same pistons. They were £76 plus vat and P&P for full set, though :'(

Made by NPR and listed as OEM  13011392004P

Too rich for me. DSS is well over priced these days. Just did a price check on 10 items from DSS and compared the same items with a German dealer that i use. The result was DSS was £83 more expensive.

Hi Trigger,Could you advise German dealer details and I will check them out.

Put a list of some of parts on DSS basket and came to £280  :'(
Title: Re: CB750K8 Project
Post by: Trigger on December 07, 2014, 06:07:01 PM
Sent you a list PM.
Title: Re: CB750K8 Project
Post by: UK Pete on December 07, 2014, 06:25:53 PM
Hi trigg pm me the german contact please
pete
Title: Re: CB750K8 Project
Post by: martin_uk on December 07, 2014, 08:29:56 PM
Sent you a list PM.

Thanks Trigger
Title: Re: CB750K8 Project
Post by: martin_uk on December 08, 2014, 05:39:24 PM
Stripped frame and parts dropped at powder coaters.

(https://farm8.staticflickr.com/7527/15354700044_09abe9b928_c.jpg) (https://flic.kr/p/poQRnE)2014_1208Kparts50049 (https://flic.kr/p/poQRnE) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7546/15789683850_98ba420b83_c.jpg) (https://flic.kr/p/q4hfUs)2014_1208Kparts50046 (https://flic.kr/p/q4hfUs) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Just realised I forgot to drop off the handle bar clamps  :'( 

The seat pan needs alot of work as cracked and rusted through :'(

Title: Re: CB750K8 Project
Post by: martin_uk on December 08, 2014, 05:52:48 PM
Front brake caliper was the usual pain ::)

First the bleed nipple was seized, took lots of heating and soaking over 2 days, find a deep 8mm socket is good used with 1/4 drive ratchet to get a better feel and hopefully not snap nipple.

Feels a bit like playing Russian roulette getting these out :P

Once that was out, had to refit to try air pressure to push out piston.

Would not move, but managed to push piston in a bit but would not come out with air pressure, soaked with WD40 for a couple of days.

Eventually used the grease gun method, using an adaptor with grease nipple and pumped in grease.

Came out fine.

(https://farm9.staticflickr.com/8568/15789601048_c26428becd_c.jpg) (https://flic.kr/p/q4gQhQ)2014_1208Kparts50043 (https://flic.kr/p/q4gQhQ) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm9.staticflickr.com/8624/15790972959_9cb88105bf_c.jpg) (https://flic.kr/p/q4oS7t)2014_1208Kparts50045 (https://flic.kr/p/q4oS7t) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7552/15791158579_88400d05a4_c.jpg) (https://flic.kr/p/q4pPhP)2014_1208Kparts50044 (https://flic.kr/p/q4pPhP) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr
 
Title: Re: CB750K8 Project
Post by: martin_uk on December 10, 2014, 04:37:20 PM
Powder coaters rang to say managed to fit in and ready to collect all the bits I dropped off Monday :o

Picked up and parts look lovely and shiny ;D

It does feel like cheating, but alot easier than doing myself 8)

Also got them to blast and etch prime tank, as quicker than paint shop doing.

Just need to decide on colour........ Im thinking a non standard bright red or silver, any suggestions, as original maroon is not grabbing me?

Could be going for a record here  ;)  but havnt started on the prep on fixings before zinc plating and havnt started on the engine :-[
Title: Re: CB750K8 Project
Post by: royhall on December 10, 2014, 05:40:33 PM
Cripes Martin, slow down. You retired or something, its taken me 9 months to do my F2.
Title: Re: CB750K8 Project
Post by: Green1 on December 10, 2014, 05:49:31 PM
9 months that's nothing its taken me 2 years to think about striping my gold bike to weld the frame.
I may get around to doing it soon as I'm now on my Christmas break as of of Saturday     ???:)

Mick
Title: Re: CB750K8 Project
Post by: martin_uk on December 10, 2014, 06:01:33 PM
I find my motivation is greatest on a new project and am keen to progress, but if I hit an obstacle can go back to one of the others ;D

I do love getting bits back from powder coaters and zinc platers!
Title: Re: CB750K8 Project
Post by: martin_uk on December 12, 2014, 12:06:48 PM
Tank blasted and etch primed

(https://farm8.staticflickr.com/7487/15816457368_ab071366be_c.jpg) (https://flic.kr/p/q6DtJQ)2014_1212Kparts60001 (https://flic.kr/p/q6DtJQ) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Frame all nice and shiny

(https://farm8.staticflickr.com/7468/15381601404_39959f87e5_c.jpg) (https://flic.kr/p/prdJdd)2014_1212Kparts60002 (https://flic.kr/p/prdJdd) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm9.staticflickr.com/8652/15381603634_2cfab35be6_c.jpg) (https://flic.kr/p/prdJSE)2014_1212Kparts60004 (https://flic.kr/p/prdJSE) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr
Title: Re: CB750K8 Project
Post by: UK Pete on December 12, 2014, 04:13:11 PM
Slow down martin you are embarrassing us all with the speed you get things done HaHa
pete
Title: Re: CB750K8 Project
Post by: JamesH on December 12, 2014, 04:28:21 PM
Holy f**k Martin - its like Usain Bolt has just joined the forum. So who do you use for the powdercoating? Looks v nice...
Title: Re: CB750K8 Project
Post by: ka-ja on December 12, 2014, 07:09:48 PM
Hi,
     I must be a three legged tortoise compared to this man,nearly three years now on my mission, I think I must lack youth and enthusiasm!
Title: Re: CB750K8 Project
Post by: Bitsa (Ralph Wright - RIP) on December 12, 2014, 07:34:52 PM
Nice one
Powder coating worries me if, for christ sake you do scratch it how do you repair it?Does look the dogs though
Cheers
Bitsa
Title: Re: CB750K8 Project
Post by: Trigger on December 12, 2014, 07:44:36 PM
Bitsa, If you scratch powder coating you can easy repair with a blowtorch, a little tricky. I always get my frames done in satin black as i find the gloss too much.
Title: Re: CB750K8 Project
Post by: Bitsa (Ralph Wright - RIP) on December 12, 2014, 08:02:38 PM
Thanks Trig
For a way out of date has been, feeling is dont like that idea.That said I do not restore bikes to show condition or better than Honda did so I guess its down to what people want.
Cheers
Bitsa
Title: Re: CB750K8 Project
Post by: martin_uk on December 13, 2014, 01:41:17 PM
Holy f**k Martin - its like Usain Bolt has just joined the forum. So who do you use for the powdercoating? Looks v nice...

Aurora in Ash Vale, Surrey

http://www.aurorapowdercoating.co.uk/ (http://www.aurorapowdercoating.co.uk/)
Title: Re: CB750K8 Project
Post by: martin_uk on December 13, 2014, 01:43:35 PM
Nice one
Powder coating worries me if, for christ sake you do scratch it how do you repair it?Does look the dogs though
Cheers
Bitsa

I just use black car touch in paint
Title: Re: CB750K8 Project
Post by: martin_uk on December 14, 2014, 10:01:03 PM
You guys are making me feel guilty about the time I spend on the bike projects :-[

I didnt mention the CG125 I bought as a non runner and ended up rebuilding the engine, then had to do all the other bits that I didnt like, had to powder coat the rusty swinging arm, centre stand, headlight brackets and its sitting on my bike lift, stopping me frrom getting on with reassembling K8 frame >:(  Trouble is all the nice shiny bits make the rest look bad and its not worth spending the money on  :'(

I still managed to get some work done on K8, stripping front wheel, prepping fittings for plating, removed rear hub carrier bearing.

(https://farm8.staticflickr.com/7566/15403006423_693a8eb6c7_c.jpg) (https://flic.kr/p/pt7rbg)2014_1214partstosell0044 (https://flic.kr/p/pt7rbg) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm9.staticflickr.com/8603/16021952862_dfcca7d47c_c.jpg) (https://flic.kr/p/qpNGoA)2014_1214partstosell0041 (https://flic.kr/p/qpNGoA) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7504/16021960132_36903b19e5_c.jpg) (https://flic.kr/p/qpNJxW)2014_1214partstosell0042 (https://flic.kr/p/qpNJxW) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7478/15996853296_3c0b019d19_c.jpg) (https://flic.kr/p/qnA4as)2014_1214partstosell0047 (https://flic.kr/p/qnA4as) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7560/15403014033_84ef9b5a56_c.jpg) (https://flic.kr/p/pt7trt)2014_1214partstosell0048 (https://flic.kr/p/pt7trt) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7520/15835212308_56c572c5bc_c.jpg) (https://flic.kr/p/q8iAVS)2014_1214partstosell0050 (https://flic.kr/p/q8iAVS) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Rear hub carrier retainer came out easily after drilling staking, bearing was no problem after warming hub.

Will fit the 2rs bearings with 2 rubbers seals, just ordered full set of SKF wheel bearings 1x 6305 2rs  2x 6304 2rs  2x6302 2rs £21.85 on Ebay.

Tyres arrived yesterday, went for Avon AM26 Roadrider V rated  100/90/19 front and 120/90/17 rear
Title: Re: CB750K8 Project
Post by: martin_uk on December 14, 2014, 10:03:29 PM
Slow down martin you are embarrassing us all with the speed you get things done HaHa
pete

Its much easier when someone else does the painting and plating  ;D
Title: Re: CB750K8 Project
Post by: Green1 on December 14, 2014, 11:34:58 PM
What is it with Cg Honda's I to have one taking up valuable space.
Do those need replating I don't thing theirs one bolt on mine that good  :-[

Mick
Title: Re: CB750K8 Project
Post by: martin_uk on December 17, 2014, 05:13:28 PM
Thought I had better get wheels in motion to get UK registration, so wrote to Honda on 10/12 asking to confirm year of manufacture and included £30 fee.

Received a very quick response today with confirmation letter, a bit surprised they were so quick.

Just need to finish bike and get insurance and MOT before next step :D
Title: Re: CB750K8 Project
Post by: martin_uk on December 23, 2014, 09:09:25 PM
Only 3 exhausts that came with bike, 2 look OK and third is rotted.

The 2 good ones are marked IR and IL.


I see from parts list that different part numbers are listed for exhausts from 2818258, which mine is.

Anyone know what the difference is and compatability with earlier 405 pipes?

Thanks

Martin
Title: Re: CB750K8 Project
Post by: martin_uk on December 24, 2014, 04:53:42 PM
Off for plating

(https://farm9.staticflickr.com/8643/15910101457_ff582870f5_c.jpg) (https://flic.kr/p/qeVqS6)2014_1224kparts80011 (https://flic.kr/p/qeVqS6) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

and as if by magic  :o

(https://farm8.staticflickr.com/7519/15910111267_440b8237c6_c.jpg) (https://flic.kr/p/qeVtMe)2014_1224kparts80013 (https://flic.kr/p/qeVtMe) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm9.staticflickr.com/8582/15476190333_057df55a7f_c.jpg) (https://flic.kr/p/pzzwcP)2014_1224kparts80014 (https://flic.kr/p/pzzwcP) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Cam cover screws, seat latch and battery carrier bolts were black plated so did the same.

(https://farm8.staticflickr.com/7466/16095871675_5daed6e260_c.jpg) (https://flic.kr/p/qwkxST)2014_1224kparts80015 (https://flic.kr/p/qwkxST) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm9.staticflickr.com/8656/15908594070_d609efee8e_c.jpg) (https://flic.kr/p/qeMGLE)2014_1224kparts80016 (https://flic.kr/p/qeMGLE) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

The trays were from supermarket and quite handy for sorting.
Title: Re: CB750K8 Project
Post by: Bitsa (Ralph Wright - RIP) on December 24, 2014, 05:44:52 PM
Bloody lovely
Cheers
Bitsa
Title: Re: CB750K8 Project
Post by: sprinta on December 25, 2014, 11:51:03 PM
Off for plating

(https://farm9.staticflickr.com/8643/15910101457_ff582870f5_c.jpg) (https://flic.kr/p/qeVqS6)2014_1224kparts80011 (https://flic.kr/p/qeVqS6) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

and as if by magic  :o

(https://farm8.staticflickr.com/7519/15910111267_440b8237c6_c.jpg) (https://flic.kr/p/qeVtMe)2014_1224kparts80013 (https://flic.kr/p/qeVtMe) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm9.staticflickr.com/8582/15476190333_057df55a7f_c.jpg) (https://flic.kr/p/pzzwcP)2014_1224kparts80014 (https://flic.kr/p/pzzwcP) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Cam cover screws, seat latch and battery carrier bolts were black plated so did the same.

(https://farm8.staticflickr.com/7466/16095871675_5daed6e260_c.jpg) (https://flic.kr/p/qwkxST)2014_1224kparts80015 (https://flic.kr/p/qwkxST) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm9.staticflickr.com/8656/15908594070_d609efee8e_c.jpg) (https://flic.kr/p/qeMGLE)2014_1224kparts80016 (https://flic.kr/p/qeMGLE) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

The trays were from supermarket and quite handy for sorting.

How is the black finish done? What plating process is it?
Title: Re: CB750K8 Project
Post by: martin_uk on December 26, 2014, 09:58:40 AM
Off for plating



How is the black finish done? What plating process is it?

I believe it is part of passivation process, as can choose clear (silver colour) coloured (yellow) or black.

Have also had parts nickel plated, cheaper than chroming, but not same bright shine, but does suit some applications, especially older bikes where it was used before chrome became common. 
Title: Re: CB750K8 Project
Post by: martin_uk on December 26, 2014, 10:02:40 AM
Hub carrier drilled out staking to facilitate removal of retainer

(https://farm8.staticflickr.com/7511/15473549864_b611217e38_c.jpg) (https://flic.kr/p/pzkZhu)2014_1224kparts80001 (https://flic.kr/p/pzkZhu) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr
Title: Re: CB750K8 Project
Post by: martin_uk on January 03, 2015, 11:41:14 AM
Look what Santa brought- Ooh a new genuine exhaust  for Xmas  :)

(https://farm9.staticflickr.com/8643/16181391541_9e7e724781_c.jpg) (https://flic.kr/p/qDTRXk)2015_0101exhaust0003 (https://flic.kr/p/qDTRXk) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7483/15997207109_d8779ebf44_c.jpg) (https://flic.kr/p/qnBSkF)2015_0101exhaust0004 (https://flic.kr/p/qnBSkF) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Just need an upper left marked SL now.
Title: Re: CB750K8 Project
Post by: martin_uk on January 03, 2015, 08:49:36 PM
Fitted the bronze swing arm bushes purchased from

http://www.ebay.co.uk/itm/360953538938?_trksid=p2059210.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT (http://www.ebay.co.uk/itm/360953538938?_trksid=p2059210.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT)

Thanks to Triggers suggestion, also bought some taper bearing head races, cables and brake/clutch levers.

Seem to fit alot of models and good price.

CB 250 K CB250K3-5 72-75       
CJ 250 T CJ250T 77-79       
XL 250 XL250K3 77        
CB 360 G CB360G 75-77        
CJ 360 T CJ360T 76-79        
CB 400 Four CB400F 75-79        
CB 500 Four CB500F 72-77        
CB 500 T CB500T 75-79        
CB 500 Four CB550F 76-79        
CB 500 K CB550K3 77-79       
CB 750 F1/F2 CB750G 77-78       
CB 750 Four CB750K0-7 70-78       
CB 750 F RC04 80        
CB 750 KZ RC01 79-80        
CB 900 F SC01 79-80        

CBX 1000 CB1 78-80

Pleased with the way they fitted, with just the right amount of resistance.

Soaked in oil first just in case required.

I thought they might need to be reamed once pressed in (used 12mm studding with large washers to draw in), but fit with sleeve seems good.

I had already had arm powder coated so masking tape and foam for protection.

(https://farm9.staticflickr.com/8610/16001552979_e69bbb7a33_c.jpg) (https://flic.kr/p/qo19dt)2015_0103armse0028 (https://flic.kr/p/qo19dt) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7579/16000270940_d120dcfab0_c.jpg) (https://flic.kr/p/qnTz7m)2015_0103armse0029 (https://flic.kr/p/qnTz7m) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr
Title: Re: CB750K8 Project
Post by: Nurse Julie on January 03, 2015, 09:42:42 PM
Quote. I thought they might need to be reamed once pressed in (used 12mm studding with large washers to draw in), but fit with sleeve seems good.

How lovely to learn the proper way to fit these bushes. I also got mine from twowheelfrank a couple of weeks ago, but I hit mine home with a piece of 4 x 2 timber and a hammer. I also soaked mine overnight as suggested by Hairygit I think, and they fit a treat.
Title: Re: CB750K8 Project
Post by: UK Pete on January 03, 2015, 09:47:46 PM
They look like great replacements i have a set some where, what is the oil soaking about?
pete
Title: Re: CB750K8 Project
Post by: hairygit on January 03, 2015, 09:52:19 PM
Because phosphour bronze is porous, it soaks up some of the oil, meaning they are thoroughly lubricated, and with the grease as well, they dont wear quickly.
Title: Re: CB750K8 Project
Post by: Green1 on January 03, 2015, 10:16:01 PM
4 X 2 and a hammer are the 2 most used tools in my toolbox

Mick
Title: Re: CB750K8 Project
Post by: Nurse Julie on January 03, 2015, 10:28:04 PM
4 X 2 and a hammer are the 2 most used tools in my toolbox

Mick

Haha, I thought it was just me that resorted to unorthodox tools for the removal or fitting of parts. If I told you the implements I have had to use to get some of the bigger nuts and bolts undone on my 400, it would make a mechanic weep. Never mind, I get there in the end.
Julie
Title: Re: CB750K8 Project
Post by: martin_uk on January 05, 2015, 07:53:10 PM
Started to have a look at engine in detail.

Head had valve jammed open even with cam shaft removed.

Cylinders have corrosion markings where piston seized and rings seized in pistons.

(https://farm8.staticflickr.com/7512/16181956616_c654aebba5_c.jpg) (https://flic.kr/p/qDWKW1)2015_0105mountingbrake0044 (https://flic.kr/p/qDWKW1) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm9.staticflickr.com/8604/16207832125_b1eed16f40_c.jpg) (https://flic.kr/p/qGenPt)2015_0105mountingbrake0047 (https://flic.kr/p/qGenPt) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7571/16207828505_c8bbd9f56e_c.jpg) (https://flic.kr/p/qGemK4)2015_0105mountingbrake0048 (https://flic.kr/p/qGemK4) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Will need a rebore.

Bought a set of original NOS pistons and rings on Ebay before Xmas, but not yet arrived, seller says they are oversize but not sure yet what size. ::)
Title: Re: CB750K8 Project
Post by: martin_uk on January 07, 2015, 05:00:35 PM
Pistons arrived today pn 13105-392-000 and rings 13051-300-024

Although they are the flatter top ones.

Pistons are marked 1.00 so whilst maximum normal range, wont have worries that wont be big enough  :-[

Seems a bit of a shame going straight to max oversize as my bores are not that bad.

Also found some interesting info on oversizes on CSMNL site

"Which piston and piston ring oversize should I use?

Here is some important information on how to determine which piston oversize one should order.

With the piston ring one has to look at the 4th position in the part number. The value of the 4th position refers to the following oversizes:

1 => std.
2 => 0.25
3 => 0.50
4 => 0.75
5 => 1.00

Consider this ( fictional) part number: 123256789012345. With this example the 4th position is 2, meaning an oversize of 0.25

For pistons, the 5th position in the part number refers to the same oversize table. "

http://www.cmsnl.com/help/faq/14_honda/#f94 (http://www.cmsnl.com/help/faq/14_honda/#f94)

This means the rings match the pistons  :)
Title: Re: CB750K8 Project
Post by: martin_uk on January 07, 2015, 05:08:35 PM
Started to strip seat, but needs work on pan as well  :'(

(https://farm8.staticflickr.com/7538/15331114924_a13196eab2_c.jpg) (https://flic.kr/p/pmKYkE)CB750K8 purchased eb (https://flic.kr/p/pmKYkE) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7583/16221559391_f7f97138a7_c.jpg) (https://flic.kr/p/qHrJst)2015_0107seat0002 (https://flic.kr/p/qHrJst) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Obligatory cracks  ::)

(https://farm9.staticflickr.com/8582/16036069520_20d2fecd2b_c.jpg) (https://flic.kr/p/qr43Mf)2015_0107seat0004 (https://flic.kr/p/qr43Mf) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7474/16036073210_94ee75ca27_c.jpg) (https://flic.kr/p/qr44SS)2015_0107seat0005 (https://flic.kr/p/qr44SS) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7525/16223431965_72834dd8aa_c.jpg) (https://flic.kr/p/qHBk7e)2015_0107seat0007 (https://flic.kr/p/qHBk7e) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr
Title: Re: CB750K8 Project
Post by: UK Pete on January 07, 2015, 05:15:55 PM
Do you think you can salvage it martin
Title: Re: CB750K8 Project
Post by: martin_uk on January 07, 2015, 05:21:21 PM
Busy week for parts arriving.

Carbs from Ebay purchase arrived.

Dont look too bad.

(https://farm9.staticflickr.com/8644/16033819108_6c48d344a3_c.jpg) (https://flic.kr/p/qqRvP3)K8 carbs before$_57 (https://flic.kr/p/qqRvP3) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7510/16033818898_b080630ba4_c.jpg) (https://flic.kr/p/qqRvKq)K8 carbs before$_55 (https://flic.kr/p/qqRvKq) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7530/16220523652_d0dfea6767_c.jpg) (https://flic.kr/p/qHmqyU)2015_0107carbs0011 (https://flic.kr/p/qHmqyU) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm9.staticflickr.com/8642/15598922554_70b7b57e37_c.jpg) (https://flic.kr/p/pLqydA)2015_0107carbs0002 (https://flic.kr/p/pLqydA) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7558/16033818568_41b1389953_c.jpg) (https://flic.kr/p/qqRvDJ)2015_0107carbs0001 (https://flic.kr/p/qqRvDJ) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm9.staticflickr.com/8611/16035514147_1def8a84b4_c.jpg) (https://flic.kr/p/qr1cFR)2015_0107carbs0009 (https://flic.kr/p/qr1cFR) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr
Title: Re: CB750K8 Project
Post by: martin_uk on January 07, 2015, 05:37:35 PM
Do you think you can salvage it martin

Will give it a try  8)
Title: Re: CB750K8 Project
Post by: martin_uk on January 07, 2015, 05:47:16 PM
Big thank you to BigAl who sent through wiring loom multi connectors (on approval)  that actually match the original :)

Be aware that alot of the connector suppliers dont have the correct ones.

The original wiring was bad, the loom off Ebay a bit better,  connectors seem to crumble in the US.

May end up going for Alan's harness rebuild, just depends on state of internal wiring when I cut and strip back.

(https://farm9.staticflickr.com/8675/16036437500_f0288b1781_c.jpg) (https://flic.kr/p/qr5WaJ)2015_0107conn0001 (https://flic.kr/p/qr5WaJ) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7575/16223791475_9dd5991b43_c.jpg) (https://flic.kr/p/qHDaYF)2015_0107conn0002 (https://flic.kr/p/qHDaYF) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

I better get on and start fixing  :P
Title: Re: CB750K8 Project new arrival from DSS
Post by: martin_uk on January 07, 2015, 07:04:27 PM
Just about to go into my rather chilly garage when another parcel arrived :)

If you want to know what £102.71 worth of mostly repro parts from DSS looks like  :P

(https://farm8.staticflickr.com/7490/16223544162_001f1bd6e2_c.jpg) (https://flic.kr/p/qHBUsE)2015_0107dsparts0001 (https://flic.kr/p/qHBUsE) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Reminds me of a lucky dip  ::)

(https://farm8.staticflickr.com/7501/16198459506_8a7829d1f0_c.jpg) (https://flic.kr/p/qFpkEA)2015_0107dsparts0005 (https://flic.kr/p/qFpkEA) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

pair of mirrors

(https://farm9.staticflickr.com/8631/16036852308_242a2d1f54_c.jpg) (https://flic.kr/p/qr84tA)2015_0107dsparts0007 (https://flic.kr/p/qr84tA) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Clutch and choke cables, throttle tube, side stand rubber, choke bracket

(https://farm9.staticflickr.com/8566/16222492081_b79dff2ccb_c.jpg) (https://flic.kr/p/qHwvHk)2015_0107dsparts0008 (https://flic.kr/p/qHwvHk) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Brake pads and shoes.

(https://farm8.staticflickr.com/7494/16038251269_c524d3d14e_c.jpg) (https://flic.kr/p/qrfekB)2015_0107dsparts0009 (https://flic.kr/p/qrfekB) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

and the bill :'(
Title: Re: CB750K8 Project
Post by: Bryanj on January 08, 2015, 06:55:46 AM
You can check the ring size easily on the ring as it will have the oversize close to the ends, o/s pistons should also be marked
Title: Re: CB750K8 Project Frame reassembly
Post by: martin_uk on January 13, 2015, 08:59:20 PM
Cleared my bike lift and got the freshly powder coated frame in place.

I find the foil backed insulation board quite handy to protect frrom damage.

(https://farm9.staticflickr.com/8640/16087825009_bf8d8a4e5c_c.jpg) (https://flic.kr/p/qvCiTg)2015_0112frame0004 (https://flic.kr/p/qvCiTg) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Started by cleaning all threads with a tap.

(https://farm8.staticflickr.com/7555/15651523714_7369f13515_c.jpg) (https://flic.kr/p/pR59H9)2015_0112frame0014 (https://flic.kr/p/pR59H9) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr


I have found that unless you do this, the remnants of blasting medium and powder coat can cause threads to jam.

Fitting the centre stand is much easier before the swinging arm is fitted, as you can fit the spring tilt the stand up and slide the pin in as most of the tension is off the spring. Check the pin fits in stand and brackets first and may need a gentle tap with sofy mallet. Certainly beats the other methods of fitting spring.

(https://farm8.staticflickr.com/7571/16086455318_fb74af08a8_c.jpg) (https://flic.kr/p/qvvhHU)2015_0112frame0019 (https://flic.kr/p/qvvhHU) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Swinging arm fitted, make sure brake arm is forward of this.

(https://farm8.staticflickr.com/7548/15654053703_ece017c0a8_c.jpg) (https://flic.kr/p/pRi7MD)2015_0112frame0020 (https://flic.kr/p/pRi7MD) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Not what I wanted to find  :'(

(https://farm8.staticflickr.com/7549/16273923295_207191338e_c.jpg) (https://flic.kr/p/qN57qp)2015_0112frame0029 (https://flic.kr/p/qN57qp) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Someone has tried to force a nut with wrong thread on top shock absorber mount and damaged thread.

Honda use alot of fine M10 bolts with pitch of 1.25 instead of standard 1.5

Would have preferred to find and fix before frame was painted.

I dont have a M10 fine die and it may have been difficult to get aligned, so use a thread restorer file, didnt have a metric one but 20 tpi seems close and was able to clean up threads and fit correct nut.

(https://farm9.staticflickr.com/8607/16087791439_b44fabaf4b_c.jpg) (https://flic.kr/p/qvC8Ut)2015_0112frame0048 (https://flic.kr/p/qvC8Ut) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

 
Title: Re: CB750K8 Project
Post by: MarkCR750 on January 13, 2015, 09:41:00 PM
Martin, I have a K7 seat in pretty good condition (I think the seat pan is spot on from memory), your welcome to it for the price of postage if you want it, cheers Mark.
Title: Re: CB750K8 Project
Post by: Trigger on January 13, 2015, 10:08:53 PM
I put bolts in all the treads before it gets blasted and goes of for powder, save a ton of work later.
Title: Re: CB750K8 Project
Post by: martin_uk on January 14, 2015, 10:53:19 AM
Martin, I have a K7 seat in pretty good condition (I think the seat pan is spot on from memory), your welcome to it for the price of postage if you want it, cheers Mark.

Mark, Thats very kind of you, have sent PM
Title: Re: CB750K8 Project
Post by: martin_uk on January 14, 2015, 05:48:15 PM
The brake torque arm fixing on brake plate was a pain to remove as head of bolt turned due to wear and recessed so you cant get a spanner on it.

Bought a new bolt and hoped it would be held by back plate.

Had to centre punch plate in the end to hold in place.

(https://farm8.staticflickr.com/7480/16273088602_4529f585bb_c.jpg) (https://flic.kr/p/qMZQi9)2015_0112frame0050 (https://flic.kr/p/qMZQi9) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr
Title: Re: CB750K8 Project
Post by: martin_uk on January 14, 2015, 05:53:59 PM
Fork ears from the US.

(https://farm8.staticflickr.com/7532/15654069313_de3de97af3_c.jpg) (https://flic.kr/p/pRicqM)2015_0112frame0001 (https://flic.kr/p/pRicqM) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

There is a wear lip on indicator mounting section, as far as I am aware the indicators mount over the projection so unsure how the wear lip formed?
Title: Re: CB750K8 Project
Post by: martin_uk on January 14, 2015, 06:00:52 PM
Tank badges prepared for painting.

(https://farm8.staticflickr.com/7582/16086397708_695d435f5e_c.jpg) (https://flic.kr/p/qvuZAC)2015_0112frame0025 (https://flic.kr/p/qvuZAC) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Took a while to trim the masking tape with scalpel.

(https://farm9.staticflickr.com/8606/16273180432_be9211dfda_c.jpg) (https://flic.kr/p/qN1iAq)2015_0112frame0030 (https://flic.kr/p/qN1iAq) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Painted, but masking not removed.

Used Simoniz Tough Satin Black, which does not need primer

I have tried painting with small brush but spraying gives a more uniform finish.

Not forgetting the scews

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Title: Re: CB750K8 Project
Post by: UK Pete on January 14, 2015, 06:03:51 PM
Very intricate cutting of the masking tape martin
Title: Re: CB750K8 Project
Post by: martin_uk on January 14, 2015, 06:07:51 PM
Very intricate cutting of the masking tape martin

It was not perfect, but by angling the spray managed to cover sides and background to letters OK.

At least I could do most of it in the warm and also warmed up badges before painting.

I will take a pic after masking removed.

Title: Re: CB750K8 Project rear shock absorbers
Post by: martin_uk on January 15, 2015, 06:57:23 PM
Just stripped and cleaned shock absorbers and have added a few points I have learnt.

When taking apart it is best to take pressure off top fixing.

Ideally you would use spring clamps/compressors, but if you dont have, with great caution you can use cable ties.

First set adjuster to maximum pretension.

Use two or more cable ties to hold colis together.

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Set adjuster to minimum and the spring should be held compresed enough to remove top fixing. ( or collets)

Treat the tensioned spring with extreme caution  as there is quite a lot of built up energy which will release if cable ties fail, so leave on its side without contact with anything else. (If it was upright and tie/s failed it would take off)

It is a good idea to use penetrating fluid to soak the threads, push out the top rubber bush to access  from top.

(https://farm9.staticflickr.com/8578/16273914745_f2476cf958_c.jpg) (https://flic.kr/p/qN54SZ)2015_0112frame0041 (https://flic.kr/p/qN54SZ) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr



On CB750 there is a 17mm across flats nut that locks shaft to top and needs to be loosened using a spanner between spring coils and unscrew until reaches end of thread.

You can then hold shaft with nut and use a bar to unscrew top.

On mine one came off OK but I had to warm top part with hot air gun to expand and release.


(https://farm8.staticflickr.com/7575/15654130393_0b96fc1102_c.jpg) (https://flic.kr/p/pRivzT)2015_0112frame0043 (https://flic.kr/p/pRivzT) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr


You can now easily check the damping resistance and clean up the body before reassembly, reset adjuster to max and remove ties.
Title: Re: CB750K8 Project
Post by: Trigger on January 15, 2015, 07:01:37 PM
Be very careful as i have a nice scar on my top lip from doing this job without a press.
Title: Re: CB750K8 Project
Post by: Bitsa (Ralph Wright - RIP) on January 15, 2015, 08:39:05 PM
Well there you go let them be to get on with it
Cheers
Bitsa
Title: Re: CB750K8 Project
Post by: MarkCR750 on January 15, 2015, 08:54:31 PM
Martin I PM'd you about the seat but I'm not sure you got it, anyway I will get the seat out of the garage and send it this weekend or early next week, I got your PM so I have your address etc, cheers Mark.
Title: Re: CB750K8 Project
Post by: martin_uk on January 16, 2015, 11:24:36 AM
Shocks reinstalled

(https://farm8.staticflickr.com/7510/16105897159_228fb0a44d_c.jpg) (https://flic.kr/p/qxdW74)2015_0116frame0022 (https://flic.kr/p/qxdW74) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Not perfect but new bolt looks nice  :)

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Side stand with new rubber and plated fixings

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Ignition switch and instrument bracket, can you spot the deliberate mistake?

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Yokes fitted.

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Tail light looks OK from outside.

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Not so good inside

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Title: Re: CB750K8 Project
Post by: martin_uk on January 19, 2015, 06:03:15 PM
Finished tank badge.

(https://farm8.staticflickr.com/7515/15696666564_7b04f643e0_c.jpg) (https://flic.kr/p/pV4w79)2015_0119frame0024 (https://flic.kr/p/pV4w79) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr
Title: Re: CB750K8 Project
Post by: martin_uk on January 19, 2015, 06:17:14 PM
Removed the tyres, is it me getting old or just really old tyres, but hard work. :'(

Front rim quite rusty on inside  and most spokes seized  >:(

Have just ordered new DID rim from DSS with repro spokes.

Rear rim spokes not seized but quite rusty so ordered a new set.

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DSS dont have DID rear rims listed, almost bought a Morad alloy from another supplier, but decided against another £100 plus and the rear rim is not so visible, but the wheel is bloody heavy with the rear drum.

Rear retainer came out easly after drilling stakings.

(https://farm8.staticflickr.com/7547/16318213762_b487c35725_c.jpg) (https://flic.kr/p/qRZ7r9)2015_0119frame0047 (https://flic.kr/p/qRZ7r9) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7461/15699219463_2d7562f9b1_c.jpg) (https://flic.kr/p/pVhAZD)2015_0119frame0051 (https://flic.kr/p/pVhAZD) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Plus it helps to have the tool ;D

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Havnt seen this moulded rim tape before?

(https://farm9.staticflickr.com/8592/16132867149_e820b98630_c.jpg) (https://flic.kr/p/qzBakT)2015_0119frame0078 (https://flic.kr/p/qzBakT) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

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Prepared and painted instruments.

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Title: Re: CB750K8 Project
Post by: martin_uk on January 26, 2015, 06:06:25 PM
Made some progress on wheels.

Rebuilt rear with new spokes and bearings.

New DID rim for front with new spokes and bearings and lightly polished hub.

(https://farm9.staticflickr.com/8653/16187929009_a4d56d0f67_c.jpg) (https://flic.kr/p/qEtnji)2015_0126frame0095 (https://flic.kr/p/qEtnji) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm9.staticflickr.com/8667/16186553408_e3b3ef3ea3_c.jpg) (https://flic.kr/p/qEmjp3)2015_0126frame0097 (https://flic.kr/p/qEmjp3) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

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Hub before

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(https://farm8.staticflickr.com/7333/15751708094_fe54298f93_c.jpg) (https://flic.kr/p/pZVC33)2015_0126frame0099 (https://flic.kr/p/pZVC33) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr
Title: Re: CB750K8 Project
Post by: martin_uk on January 26, 2015, 06:09:45 PM
Soak and heat didnt work on releasing some of spokes, so................

(https://farm9.staticflickr.com/8575/16187953989_176fb53237_c.jpg) (https://flic.kr/p/qEtuJZ)2015_0126frame0087 (https://flic.kr/p/qEtuJZ) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr
Title: Re: CB750K8 Project
Post by: Bitsa (Ralph Wright - RIP) on January 26, 2015, 07:02:04 PM
Nice wheel looks good
Cheers
Bitsa
Title: Re: CB750K8 Project
Post by: martin_uk on January 26, 2015, 09:15:42 PM
Nice wheel looks good
Cheers
Bitsa

Thanks Bitsa, like to say it gets easier but still tricky, but worth doing.
Title: Re: CB750K8 Project
Post by: Trigger on January 26, 2015, 09:31:32 PM
Martin, did you receive the fork cap mate ?
Title: Re: CB750K8 Project
Post by: martin_uk on January 27, 2015, 04:36:57 PM
Martin, did you receive the fork cap mate ?

Thanks Trigger, Yes looks good, hopefully soon to fit wheel.  :)
Title: Re: CB750K8 Project
Post by: martin_uk on January 28, 2015, 06:29:32 PM
Fitted tyre, always feels as if you are making some progress when tyres go on  :)

(https://farm8.staticflickr.com/7435/16387995751_8908fd16f1_c.jpg) (https://flic.kr/p/qY9LbT)2015_0128frame0003 (https://flic.kr/p/qY9LbT) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Had to deflate tyre and reinflate at higher pressure to get seated correctly, with guide marks even.

(https://farm9.staticflickr.com/8635/16389731415_a1e5bd9f7e_c.jpg) (https://flic.kr/p/qYiE98)2015_0128frame0006 (https://flic.kr/p/qYiE98) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Title: Re: CB750K8 Project
Post by: martin_uk on January 28, 2015, 06:35:53 PM
Rear tyre fitted

(https://farm8.staticflickr.com/7405/16202097638_0a3c0b11c9_c.jpg) (https://flic.kr/p/qFHZa1)2015_0128frame0013 (https://flic.kr/p/qFHZa1) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr
Title: Re: CB750K8 Project
Post by: martin_uk on February 07, 2015, 04:28:34 PM
Dont you just hate it when you spend ages on a part to then find its the wrong one  :-[

The rear mudguard looked to be in reasonable condition, with some rust on inside.

Spent ages cleaning this off with wire brushes, emery and scouring pads, then painting inside, to find the rear mounts dont line up  :'(

(https://farm9.staticflickr.com/8664/15844731673_9b84df08ab_c.jpg) (https://flic.kr/p/q99oGR)2015_0207frame0018 (https://flic.kr/p/q99oGR) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7314/16463881842_2a12eb2bf6_c.jpg) (https://flic.kr/p/r5RGtL)2015_0207frame0012 (https://flic.kr/p/r5RGtL) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Having looked at parts diagram, seems correct one has a sort of extension piece at front mount.

Not sure what the one I have is for?

(https://farm9.staticflickr.com/8594/16463869462_8d862d63a5_c.jpg) (https://flic.kr/p/r5RCNj)2015_0207frame0020 (https://flic.kr/p/r5RCNj) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Its a US import, does anyone know what this bracket/holder is for?

(https://farm8.staticflickr.com/7449/16278911587_c4dfe278c1_c.jpg) (https://flic.kr/p/qNvFgr)2015_0207frame0021 (https://flic.kr/p/qNvFgr) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Does this mean the tail light bracket is wrong too?

(https://farm9.staticflickr.com/8634/15844744403_dca515302a_c.jpg) (https://flic.kr/p/q99suk)2015_0207frame0025 (https://flic.kr/p/q99suk) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr
Title: Re: CB750K8 Project
Post by: martin_uk on February 07, 2015, 04:33:15 PM
Made a bit more progress.

(https://farm8.staticflickr.com/7318/16464774905_f8424402c5_c.jpg) (https://flic.kr/p/r5WgXp)2015_0207frame0037 (https://flic.kr/p/r5WgXp) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

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Title: Re: CB750K8 Project
Post by: UK Pete on February 07, 2015, 04:38:24 PM
Good work martin, i just cant get any motivation lately to do anything
pete
Title: Re: CB750K8 Project
Post by: martin_uk on February 07, 2015, 04:41:47 PM
Wheels balanced

(https://farm8.staticflickr.com/7430/16278748649_baae70a6b5_c.jpg) (https://flic.kr/p/qNuQQa)2015_0207frame0031 (https://flic.kr/p/qNuQQa) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Tape is just to give self adhesive weights a bit of support until bonded.

Considered going for 530 conversion but as bought fairly cheap NOS 630 sprocket decided to keep original
(https://farm9.staticflickr.com/8592/16463243131_468d273770_c.jpg) (https://flic.kr/p/r5NqBv)2015_0207frame0033 (https://flic.kr/p/r5NqBv) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Light polish on brake plate

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Title: Re: CB750K8 Project
Post by: martin_uk on February 07, 2015, 04:50:22 PM
Good work martin, i just cant get any motivation lately to do anything
pete

I know what you mean Pete, as it can be a struggle sometimes :(

I sometimes just do a few small jobs, on the basis that its one more less job to do.  :)
Title: Re: CB750K8 Project
Post by: mickwinf on February 07, 2015, 05:11:06 PM
I had a mudguard like that with the metal box, turned out to be a cb650 US import.
Title: Re: CB750K8 Project
Post by: royhall on February 07, 2015, 05:26:28 PM
Martin. Who does your plating, looks like a top job. What sort of prices do they charge. Bikes coming on a treat, been interesting to follow with all the photos. Thanks.
Title: Re: CB750K8 Project
Post by: martin_uk on February 07, 2015, 05:44:55 PM
Martin. Who does your plating, looks like a top job. What sort of prices do they charge. Bikes coming on a treat, been interesting to follow with all the photos. Thanks.

Thanks, I  use http://mercuryelectroplating.com/ (http://mercuryelectroplating.com/) have to electric wire brush first, usually around £30 plus vat  for shoe box size batch, can do clear (silver) colour (yellow) and black
Title: Re: CB750K8 Project
Post by: martin_uk on February 09, 2015, 06:05:56 PM
One job I dislike is cleaning out petrol tanks :'(

On the K8 the inside was gummed up and looked like molasses!

Tried adding fresh fuel and soaking for a few weeks but no luck.

In meantime I had tank blasted and etch primed as this saves lots of time rubbing down rusty areas and co I use moans about it and I hope reduces their/my costs.

You do not want to be cleaning inside once painted as very easy to damage with spillage.

(https://farm9.staticflickr.com/8617/16298036939_86b67f421a_c.jpg) (https://flic.kr/p/qQcGyT)2015_0209frame0001 (https://flic.kr/p/qQcGyT) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

As petrol didnt work I used cellulose paint thinners, with some nuts to shake about.

(https://farm8.staticflickr.com/7302/16298036669_0137dab9e2_c.jpg) (https://flic.kr/p/qQcGue)2015_0209frame0002 (https://flic.kr/p/qQcGue) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

That worked quite well but you need to do in well ventilated area (outside) and wear protective gloves etc.

The first drain out was really dark and I probably drained and refilled (approx 2-3 litres) about 10 times, in the freezing cold  :o

I used a stainless funnel and kitchen towel as filter paper to make sure I wasnt putting grit back in and also allows you to see how much is coming out. Also best to leave sediment in the bottom of container when reusing.

(https://farm8.staticflickr.com/7301/16298036609_28bae1e7dc_c.jpg) (https://flic.kr/p/qQcGtc)2015_0209frame0004 (https://flic.kr/p/qQcGtc) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7351/16298036359_4f77a1d2b8_c.jpg) (https://flic.kr/p/qQcGoT)2015_0209frame0008 (https://flic.kr/p/qQcGoT) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

The problem is knowing when to stop.

Dropping tank, filler cover and new replica side panels off for painting tommorrow.
Title: Re: CB750K8 Project mudguard
Post by: martin_uk on February 14, 2015, 05:46:35 PM
After the annoyance of finding the wrong rear mudguard came with bike, looked at ones available.

A fairly rough one was £70, so thought about options.

The correct part looks like it is modified with a short extension piece.

It got me thinking, maybe I could make an adaptor 8)

Started with a cardboard template and an offcut of ally sheet.

Bent in vice with guide piece and rubber mallet.

(https://farm8.staticflickr.com/7354/16341112018_bd687b4cef_c.jpg) (https://flic.kr/p/qU1thE)2015_0214frame0007 (https://flic.kr/p/qU1thE) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7295/16341086178_c6510421d0_c.jpg) (https://flic.kr/p/qU1kB9)2015_0214frame0009 (https://flic.kr/p/qU1kB9) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7451/16342526619_25ae7c36a4_c.jpg) (https://flic.kr/p/qU8HNk)2015_0214frame0012 (https://flic.kr/p/qU8HNk) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Check fit, sides are different shapes.

An old stanchion came in handy

(https://farm8.staticflickr.com/7344/16502758236_f2c7b52a08_c.jpg) (https://flic.kr/p/r9hX5q)2015_0214frame0017 (https://flic.kr/p/r9hX5q) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Sprayed satin black

(https://farm8.staticflickr.com/7326/16527097301_af1fdb8a35_c.jpg) (https://flic.kr/p/rbrGet)2015_0214frame0026 (https://flic.kr/p/rbrGet) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7351/16341072818_6d805be9b6_c.jpg) (https://flic.kr/p/qU1gCN)2015_0214frame0029 (https://flic.kr/p/qU1gCN) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7344/16502744516_3b3d3321f5_c.jpg) (https://flic.kr/p/r9hSZS)2015_0214frame0036 (https://flic.kr/p/r9hSZS) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Quite pleased with the result  :D

Title: Re: CB750K8 Project indicators
Post by: martin_uk on February 14, 2015, 05:56:36 PM
Bike did not have any indicators when I bought.

Ebay purchases were not too bad , but needed a new lamp holder as rusted up.

Decided to try DSS replica ones for front.

Seem quite good for price at £7.95 plus vat and del.

(https://farm8.staticflickr.com/7311/16341105308_ba87332af4_c.jpg) (https://flic.kr/p/qU1rhY)2015_0214frame0002 (https://flic.kr/p/qU1rhY) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7396/15908611503_109c7dc646_c.jpg) (https://flic.kr/p/qeMMXe)2015_0214frame0003 (https://flic.kr/p/qeMMXe) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Wondered if originals lens would fit.

Original on left, note longer original screws.

(https://farm8.staticflickr.com/7370/15908607053_f5ef320b55_c.jpg) (https://flic.kr/p/qeMLCv)2015_0214frame0005 (https://flic.kr/p/qeMLCv) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

They do fit but need care to avoid cracking and you need to use original screws.

My tip for fitting light cover screws without breaking, is just use fingers on screwdriver and no wrist action  :P
Title: Re: CB750K8 Project
Post by: martin_uk on February 14, 2015, 06:04:33 PM
A bit more progress

Front wheel and caliper fitted.

(https://farm9.staticflickr.com/8595/16527788452_fece6cdf4f_c.jpg) (https://flic.kr/p/rbveFS)2015_0214frame0042 (https://flic.kr/p/rbveFS) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Rear wheel, mudguard, indicators and grab rail

(https://farm8.staticflickr.com/7288/16342916017_5811da6f71_c.jpg) (https://flic.kr/p/qUaHy6)2015_0214frame0041 (https://flic.kr/p/qUaHy6) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm9.staticflickr.com/8627/16527779832_c7dbda4f4c_c.jpg) (https://flic.kr/p/rbvc8f)2015_0214frame0040 (https://flic.kr/p/rbvc8f) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Title: Re: CB750K8 Project
Post by: Bitsa (Ralph Wright - RIP) on February 14, 2015, 06:10:52 PM
Nice work
Cheers
Bitsa
Title: Re: CB750K8 Project
Post by: martin_uk on February 15, 2015, 09:51:16 AM
Decided on colour

Its going to be the red pearl 3 stage finish as used on Clio.

Looking forward to seeing how it turns out and will decide whether to use original style decals.



(http://www.honestjohn.co.uk/media/5686094/renault_clio_renaultsport__8__630x416.jpg)
Title: Re: CB750K8 Project
Post by: JamesH on February 15, 2015, 10:16:07 AM
That's a great colour in the flesh Martin. Very vibrant an in-keeping with the 70's flake colour schemes. Nice choice...
Title: Re: CB750K8 Project
Post by: martin_uk on February 15, 2015, 10:57:55 AM
That's a great colour in the flesh Martin. Very vibrant an in-keeping with the 70's flake colour schemes. Nice choice...

Thanks James, Im  always a bit nervous about choosing non standard colours as its expensive to change!  Will post some pics when I get back.
Title: Re: CB750K8 Project
Post by: AshimotoK0 on February 15, 2015, 11:21:16 AM
I saw that colour on a Clio abroad greaming in the sunshine and it looked awesome. Thought to myself if I ever do a non-standard colour that would  be the one.

Ash
Title: Re: CB750K8 Project
Post by: UK Pete on February 15, 2015, 12:18:20 PM
Agreed with others , a stunning colour
pete
Title: Re: CB750K8 Project
Post by: Bitsa (Ralph Wright - RIP) on February 15, 2015, 06:30:31 PM
Yeah horny ;)
Cheers
Bitsa
Title: Re: CB750K8 Project
Post by: hairygit on February 15, 2015, 07:25:08 PM
Yeah horny ;)
Cheers
Bitsa
Getting worried about you Bitsa, you're describing the colour of a FRENCH car as horny? You'll be leaving your wife for some frog tart next!:o
Title: Re: CB750K8 Project
Post by: martin_uk on February 15, 2015, 08:23:03 PM
Thought I had better make a start on the oily bits.

Parts of engine are pretty grungy with caked on dirt.

(https://farm9.staticflickr.com/8640/16540069372_01ea3212b5_c.jpg) (https://flic.kr/p/rcAbnS)2015_0215engine0023 (https://flic.kr/p/rcAbnS) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Looks like someone tried to spray part of front section
(https://farm8.staticflickr.com/7457/15921086043_51d519fa4f_c.jpg) (https://flic.kr/p/qfTJcv)2015_0215engine0021 (https://flic.kr/p/qfTJcv) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Position of alternator lead clamp

(https://farm8.staticflickr.com/7360/16539460361_894d6c6247_c.jpg) (https://flic.kr/p/rcx4kF)2015_0215engine0034 (https://flic.kr/p/rcx4kF) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Oil filter housing looks quite clean

(https://farm8.staticflickr.com/7319/16355003489_bf0bdd1baf_c.jpg) (https://flic.kr/p/qVeEJM)2015_0215engine0025 (https://flic.kr/p/qVeEJM) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

No nasties in filter

(https://farm9.staticflickr.com/8655/15920953343_6879e89045_c.jpg) (https://flic.kr/p/qfT3Kz)2015_0215engine0027 (https://flic.kr/p/qfT3Kz) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Even the filter washer is present

(https://farm8.staticflickr.com/7398/16354998379_481063d3f1_c.jpg) (https://flic.kr/p/qVeDdF)2015_0215engine0026 (https://flic.kr/p/qVeDdF) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr
Title: Re: CB750K8 Project
Post by: martin_uk on February 15, 2015, 08:30:26 PM
Looks OK in sump

(https://farm9.staticflickr.com/8611/16541175475_b743f680ee_c.jpg) (https://flic.kr/p/rcFRbB)2015_0215engine0030 (https://flic.kr/p/rcFRbB) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Pick up gauze clear

(https://farm9.staticflickr.com/8664/16355263407_249fc54cf7_c.jpg) (https://flic.kr/p/qVg118)2015_0215engine0031 (https://flic.kr/p/qVg118) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Brown dust gets everywhere

(https://farm8.staticflickr.com/7284/16515104146_85d11c7c1e_c.jpg) (https://flic.kr/p/raoe5W)2015_0215engine0006 (https://flic.kr/p/raoe5W) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm9.staticflickr.com/8622/16515098336_0f99cf85c3_c.jpg) (https://flic.kr/p/raocmL)2015_0215engine0002 (https://flic.kr/p/raocmL) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Points plate

(https://farm8.staticflickr.com/7393/16515295016_67af95e941_c.jpg) (https://flic.kr/p/rapcPN)2015_0215engine0003 (https://flic.kr/p/rapcPN) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Position of overflow pipe guide
(https://farm8.staticflickr.com/7384/16539597711_9f700acf71_c.jpg) (https://flic.kr/p/rcxLaM)2015_0215engine0008 (https://flic.kr/p/rcxLaM) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr
Title: Re: CB750K8 Project
Post by: martin_uk on February 15, 2015, 08:43:04 PM
Looks to be pretty standard and not been split before

Points harness route

(https://farm8.staticflickr.com/7340/16353651050_2ed349269b_c.jpg) (https://flic.kr/p/qV7JGS)2015_0215engine0010 (https://flic.kr/p/qV7JGS) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Bolts will need attention

(https://farm9.staticflickr.com/8631/15918727084_94b49634c8_c.jpg) (https://flic.kr/p/qfFCXN)2015_0215engine0012 (https://flic.kr/p/qfFCXN) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Clutch looks reasonable

(https://farm8.staticflickr.com/7427/16540053882_b4aeebb515_c.jpg) (https://flic.kr/p/rcA6LN)2015_0215engine0013 (https://flic.kr/p/rcA6LN) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7402/16355398277_8e0a1feb4e_c.jpg) (https://flic.kr/p/qVgG6t)2015_0215engine0014 (https://flic.kr/p/qVgG6t) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

You can see they were originally assemble up side down

(https://farm8.staticflickr.com/7410/16539427421_b0f6b3f6bf_c.jpg) (https://flic.kr/p/rcwTxK)2015_0215engine0016 (https://flic.kr/p/rcwTxK) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Inside casing look good

(https://farm8.staticflickr.com/7316/15920941883_5198432e08_c.jpg) (https://flic.kr/p/qfSZkZ)2015_0215engine0019 (https://flic.kr/p/qfSZkZ) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Some of cover screws tight, but impact driver removed OK

(https://farm8.staticflickr.com/7389/15921070993_c80cb02df0_c.jpg) (https://flic.kr/p/qfTDJ2)2015_0215engine0037 (https://flic.kr/p/qfTDJ2) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Starter reduction gear, spindle  and washer

(https://farm8.staticflickr.com/7432/16541282685_806b9548ac_c.jpg) (https://flic.kr/p/rcGp44)2015_0215engine0044 (https://flic.kr/p/rcGp44) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7317/15918617884_e98972fb65_c.jpg) (https://flic.kr/p/qfF5v3)2015_0215engine0046 (https://flic.kr/p/qfF5v3) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Lifted out starter motor using one of the long M6 bolts

(https://farm9.staticflickr.com/8647/16540118282_53662fec8c_c.jpg) (https://flic.kr/p/rcAqV9)2015_0215engine0049 (https://flic.kr/p/rcAqV9) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Front sprocket pretty worn

(https://farm8.staticflickr.com/7407/16539496591_3868fd8c32_c.jpg) (https://flic.kr/p/rcxf7k)2015_0215engine0058 (https://flic.kr/p/rcxf7k) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Lots more gunge

(https://farm8.staticflickr.com/7299/15921000003_a722586492_c.jpg) (https://flic.kr/p/qfThC4)2015_0215engine0053 (https://flic.kr/p/qfThC4) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Title: Re: CB750K8 Project
Post by: martin_uk on February 15, 2015, 08:58:32 PM
Last CB750 I did selector mechanism had been partially dismantled and took a while to work out where all the bits go.

Cable tied in order to save time on reassembly

(https://farm8.staticflickr.com/7399/15918637954_4d759ed8e0_c.jpg) (https://flic.kr/p/qfFbt5)2015_0215engine0061 (https://flic.kr/p/qfFbt5) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Put a nut on bolt to hold in correct position
(https://farm9.staticflickr.com/8634/16353526568_0674b033bf_c.jpg) (https://flic.kr/p/qV76GC)2015_0215engine0064 (https://flic.kr/p/qV76GC) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7331/16353569498_33910a8bd1_c.jpg) (https://flic.kr/p/qV7jsN)2015_0215engine0067 (https://flic.kr/p/qV7jsN) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Bearing end cover screws were very tight but came out with impact driver

(https://farm8.staticflickr.com/7442/16539544051_8603630566_c.jpg) (https://flic.kr/p/rcxudB)2015_0215engine0072 (https://flic.kr/p/rcxudB) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Alternator rotor bolt was very tight, had to turn air pressure right up using impact wrench to remove.

Bolt to pull rotor off

(https://farm8.staticflickr.com/7397/15921021153_5c03a4168f_c.jpg) (https://flic.kr/p/qfToUH)2015_0215engine0074 (https://flic.kr/p/qfToUH) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Cable tied starter drive gear to rotor as one way clutch plungers and springs have a tendency to pop out

(https://farm9.staticflickr.com/8584/16354970919_c38bb7b5b8_c.jpg) (https://flic.kr/p/qVev4e)2015_0215engine0076 (https://flic.kr/p/qVev4e) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Very strange, as I removed this bolt there was a hissing, I guess thge corrosion process had created pressure.

(https://farm9.staticflickr.com/8634/16355326267_cc6ef189b8_c.jpg) (https://flic.kr/p/qVgjFV)2015_0215engine0078 (https://flic.kr/p/qVgjFV) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Casing looks quite clean and bearings good

(https://farm8.staticflickr.com/7373/16539533521_8ab5f4b977_c.jpg) (https://flic.kr/p/rcxr64)2015_0215engine0079 (https://flic.kr/p/rcxr64) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7460/15918658934_988fa2c45c_c.jpg) (https://flic.kr/p/qfFhGN)2015_0215engine0081 (https://flic.kr/p/qfFhGN) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Main bearing journals look good

(https://farm8.staticflickr.com/7394/16540160142_39204fa3ce_c.jpg) (https://flic.kr/p/rcADmS)2015_0215engine0082 (https://flic.kr/p/rcADmS) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Overall quite pleased so far as no nasty surprises :)
Title: Re: CB750K8 Project
Post by: martin_uk on February 19, 2015, 05:41:00 PM
Got to grips with the switches.

Left hand was sun bleached and dip switch would not move.

(https://farm8.staticflickr.com/7563/15765999128_b65ace377d_c.jpg) (https://flic.kr/p/q2bSgb)004 (https://flic.kr/p/q2bSgb) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm9.staticflickr.com/8568/16580570631_284185574a_c.jpg) (https://flic.kr/p/rgaKZr)2015_0210frame0017 (https://flic.kr/p/rgaKZr) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Had to take horn switch apart to clean contact to get a good resistance reading.

Cleaned the dip switch contacts in situ to avoid problems reassembling

The insides of switches are full of brown dust like the rest of bike.

(https://farm8.staticflickr.com/7366/16395922579_1fefd7e53b_c.jpg) (https://flic.kr/p/qYRoyk)2015_0210frame0040 (https://flic.kr/p/qYRoyk) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

I took apart the indicator switch and cleaned contacts with wet and dry, contact cleaner and ACF50

(https://farm9.staticflickr.com/8683/16580537351_3efc5cdfd0_c.jpg) (https://flic.kr/p/rgaA6D)2015_0210frame0015 (https://flic.kr/p/rgaA6D) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7349/16395930619_27c8bf59cf_c.jpg) (https://flic.kr/p/qYRqWX)2015_0210frame0021 (https://flic.kr/p/qYRqWX) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm9.staticflickr.com/8676/16395906779_b0e97a2da8_c.jpg) (https://flic.kr/p/qYRiRV)2015_0210frame0022 (https://flic.kr/p/qYRiRV) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

US bikes have extra wiring for marker lights in indicators

Mechanism is fairly simple as U shaped contacts just slide left or right to join together various wires.

(https://farm8.staticflickr.com/7289/16555779476_6e455939b0_c.jpg) (https://flic.kr/p/rdYGrJ)2015_0210frame0025 (https://flic.kr/p/rdYGrJ) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Vaseline is great for holding contacts, balls and springs in place when reassembling.

Found an old switch with good condition kill switch to replace original

(https://farm8.staticflickr.com/7289/16395889629_234e53161e_c.jpg) (https://flic.kr/p/qYRdLe)2015_0210frame0001 (https://flic.kr/p/qYRdLe) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm9.staticflickr.com/8661/16394580258_3f148fc9fe_c.jpg) (https://flic.kr/p/qYJvwS)2015_0210frame0006 (https://flic.kr/p/qYJvwS) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7338/16581763385_fce21c038c_c.jpg) (https://flic.kr/p/rggSya)2015_0210frame0007 (https://flic.kr/p/rggSya) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Thought about converting from US spec with lights on all the time to UK spec, but decided to leave original.

Start switch was fiddly as it cuts power to lights on start and switch came apart without me seeing exactly how it went together.

(https://farm8.staticflickr.com/7459/16394559808_2e9c13fcd7_c.jpg) (https://flic.kr/p/qYJpsh)2015_0210frame0037 (https://flic.kr/p/qYJpsh) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7365/16581082782_53df5331c9_c.jpg) (https://flic.kr/p/rgdoeC)2015_0210frame0038 (https://flic.kr/p/rgdoeC) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Cleaned up cases and painted with Simoniz tough black satin.

(https://farm8.staticflickr.com/7328/16581539665_ca44194952_c.jpg) (https://flic.kr/p/rgfJ3V)2015_0219switch0015 (https://flic.kr/p/rgfJ3V) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Touched in writing in Humbrol red model paint, fine brush, leave a few minutes then dab off excess with folded kitchen towel.

(https://farm8.staticflickr.com/7300/16555574016_c39b3290fb_c.jpg) (https://flic.kr/p/rdXDnj)2015_0219switch0017 (https://flic.kr/p/rdXDnj) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7379/16581535595_6ab711e0d6_c.jpg) (https://flic.kr/p/rgfGQK)2015_0219switch0018 (https://flic.kr/p/rgfGQK) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

I will clean off smudges when dry

(https://farm8.staticflickr.com/7360/16394327588_a814c40695_c.jpg) (https://flic.kr/p/qYHdqu)2015_0219switch0014 (https://flic.kr/p/qYHdqu) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

And finally new PVC harness covers.

Checked all resistances and seems good, next job is to fit to bike :)
Title: Re: CB750K8 Project
Post by: UK Pete on February 19, 2015, 07:38:53 PM
Great work on the switch martin, good observation on the fact they sealed the cases upside down as well
pete
Title: Re: CB750K8 Project
Post by: martin_uk on February 19, 2015, 10:36:02 PM
Ordered up a made to measure stainless  braided black covered front brake hose £20.

On the K8 there is no splitter/brake switch union and switch is fitted to master cylinder.

Old one measured at 800mm with 30 degree bent on banjo end.

(https://farm9.staticflickr.com/8657/16395677629_241db16bf9_c.jpg) (https://flic.kr/p/qYQ8K4)2015_0219switch0001 (https://flic.kr/p/qYQ8K4) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Supplier (furoreproducts.co.uk) advises female bulkhead fitting suitable for concave and convex flare.

(https://farm8.staticflickr.com/7362/16394512340_7096f98f43_c.jpg) (https://flic.kr/p/qYJakS)2015_0219switch0003 (https://flic.kr/p/qYJakS) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

I am not fully convinced, but worst case will make up new metal pipe with convex flare.

DSS pattern pipe

(https://farm8.staticflickr.com/7350/16581563215_db717b8d8b_c.jpg) (https://flic.kr/p/rgfR3X)2015_0219switch0007 (https://flic.kr/p/rgfR3X) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7419/15959402014_f31daa9ce1_c.jpg) (https://flic.kr/p/qjh7cG)2015_0219switch0005 (https://flic.kr/p/qjh7cG) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr
Title: Re: CB750K8 Project
Post by: martin_uk on February 26, 2015, 08:50:45 PM
Cleaning up engine parts

(https://farm9.staticflickr.com/8641/16470344689_8a0bcf4b01_c.jpg) (https://flic.kr/p/r6qPEa)2015_0225eng0003 (https://flic.kr/p/r6qPEa) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm9.staticflickr.com/8676/16655117601_96be08aa7f_c.jpg) (https://flic.kr/p/rnKQd2)2015_0225eng0001 (https://flic.kr/p/rnKQd2) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Front mudguard is not too pretty, but dont want to pay for repro one at moment

(https://farm9.staticflickr.com/8605/16469123010_31e1a6d063_c.jpg) (https://flic.kr/p/r6jyuJ)2015_0225eng0007 (https://flic.kr/p/r6jyuJ) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr
Title: Re: CB750K8 Project
Post by: martin_uk on February 27, 2015, 10:33:48 AM
Reassembly of crank cases stalled as I found the drive sprocket shaft seal in kit I had did not fit later larger shaft on K8, so had to order one up from DSS.

It may be possible to fit seal after crank cases together but decided to wait
Title: Re: CB750K8 Project
Post by: Bitsa (Ralph Wright - RIP) on February 27, 2015, 07:10:33 PM
Wise man Martin have it all ready mate
Cheers
Bitsa
Title: Re: CB750K8 Project
Post by: martin_uk on February 27, 2015, 07:36:58 PM
Crank cases now together, just waiting for rebored cylinders.

On my last install, I left fitting of starter motor, oil filter, oil pump, sump, alternator/ rotor and cover, clutch and selector parts until engine in and will probably do same again.

My rationale is it makes engine quite a bit lighter and easier to handle and as I have a bike lift it is not difficult to fit these after.
Title: Re: CB750K8 Project
Post by: Bitsa (Ralph Wright - RIP) on February 27, 2015, 08:04:23 PM
Like your other post well impressed wish you all the best you deserve it for all your efforts brilliant
Cheers
Bitsa
Title: Re: CB750K8 Project
Post by: martin_uk on February 27, 2015, 08:26:54 PM
Like your other post well impressed wish you all the best you deserve it for all your efforts brilliant
Cheers
Bitsa

Thanks Bitsa, it is nice when you get to reassembly stage
Title: Re: CB750K8 Project
Post by: UK Pete on February 28, 2015, 08:42:00 AM
Crank cases now together, just waiting for rebored cylinders.

On my last install, I left fitting of starter motor, oil filter, oil pump, sump, alternator/ rotor and cover, clutch and selector parts until engine in and will probably do same again.

My rationale is it makes engine quite a bit lighter and easier to handle and as I have a bike lift it is not difficult to fit these after.

quite agree the less on it the easier it gets, you do some really good work martin and really show us up for being so slow keep it up fella its great to see your progress
pete

pete
Title: Re: CB750K8 Project
Post by: martin_uk on February 28, 2015, 12:56:04 PM
Crank cases now together, just waiting for rebored cylinders.

On my last install, I left fitting of starter motor, oil filter, oil pump, sump, alternator/ rotor and cover, clutch and selector parts until engine in and will probably do same again.

My rationale is it makes engine quite a bit lighter and easier to handle and as I have a bike lift it is not difficult to fit these after.

quite agree the less on it the easier it gets, you do some really good work martin and really show us up for being so slow keep it up fella its great to see your progress
pete

pete

I hope my updates help inspire/motivate others, but it is difficult to keep motivated in the cold weather.

The K8 tank is finished but as it is over 100 miles away I wont be able to collect until week after next :'(
Title: Re: CB750K8 Project
Post by: Bitsa (Ralph Wright - RIP) on February 28, 2015, 07:17:57 PM
With you there Martin its so cold here and the moment I get an urge I open the garage door and in seconds all and sunder is wet.Shut door and not touch a thing.Does iss me off big time
Cheers
Bitsa
Title: Re: CB750K8 Project
Post by: martin_uk on February 28, 2015, 09:45:39 PM
Started on the head.

Most of valves semi seized and had to be tapped out of head.

(https://farm9.staticflickr.com/8677/16055701943_fbd5a07a59_c.jpg) (https://flic.kr/p/qsMEPi)2015_0228eng0018 (https://flic.kr/p/qsMEPi) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm9.staticflickr.com/8596/16674261081_791d00d3d5_c.jpg) (https://flic.kr/p/rprWU2)2015_0228eng0011 (https://flic.kr/p/rprWU2) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm9.staticflickr.com/8602/16674266221_19ea54c9f1_c.jpg) (https://flic.kr/p/rprYqD)2015_0228eng0012 (https://flic.kr/p/rprYqD) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Cleaned up, I use a bench electric wire brush and finish with emery cloth with valve in pillar drill.

(https://farm9.staticflickr.com/8586/16674279331_40cf6a756d_c.jpg) (https://flic.kr/p/rps3jF)2015_0228eng0023 (https://flic.kr/p/rps3jF) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm9.staticflickr.com/8580/16468342887_9fccdf74c2_c.jpg) (https://flic.kr/p/r6fyAk)2015_0228eng0021 (https://flic.kr/p/r6fyAk) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm9.staticflickr.com/8641/16674246351_80354c22d4_c.jpg) (https://flic.kr/p/rprSw4)2015_0228eng0027 (https://flic.kr/p/rprSw4) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

I will see if valves lap in OK
Title: Re: CB750K8 Project
Post by: martin_uk on March 01, 2015, 02:30:23 PM
A couple of the exhaust seats will need recutting.

(https://farm9.staticflickr.com/8645/16656979766_acd26374cf_c.jpg) (https://flic.kr/p/rnVnLj)2015_0301eng0003 (https://flic.kr/p/rnVnLj) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Others OK

4 of valves have worn or pittedstem tops.

(https://farm9.staticflickr.com/8584/16496764649_5477cae795_c.jpg) (https://flic.kr/p/r8LeoH)2015_0301eng0009 (https://flic.kr/p/r8LeoH) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Hopefully can find some used spare ones in my stash in shed ;)
Title: Re: CB750K8 Project
Post by: martin_uk on March 01, 2015, 07:34:50 PM
Found some spare valves but all the earlier type with wide collet groove :(

Dont realy want to mix different collets
Title: Re: CB750K8 Project
Post by: martin_uk on March 03, 2015, 06:11:15 PM
DSS is £35 for exhaust valve and £27.20 for inlet, CSMNL is E54 and E49 !

 Found 1 exhaust on Ebay UK for £15 inc and 1 exhaust and 2 inlet from Ebay France for £45.

Current spend including purchase is £3500 and still need to sort seat and 1 exhaust!!
Title: Re: CB750K8 Project
Post by: martin_uk on March 03, 2015, 06:20:18 PM
Stripped carbs yesterday and on reassembly found one of the float bowl screw thread in body was stripped  ::)

I have helicoils for M5 and M6, but not M4 :'(

For some reason the M4 kit is 3x the cost of M5 one  ???

Does anyone know what size tap is used for M4 helicoil or is it a special size/pitch?
Title: Re: CB750K8 Project
Post by: ka-ja on March 03, 2015, 07:10:06 PM
Hi,
    Helicoil taps are a specific size to suit the helicoil, and most helicoil sets include the appropriate tap and fitting tool for each size of coils in the set!---ken
Title: Re: CB750K8 Project
Post by: royhall on March 04, 2015, 07:39:24 AM
Best deal on valves I found were Kibblewhite valves from CycleX in the states. Good valves and still cheap even after postage and the dreaded import duty.
Title: Re: CB750K8 Project
Post by: martin_uk on March 04, 2015, 09:05:39 AM
Hi,
    Helicoil taps are a specific size to suit the helicoil, and most helicoil sets include the appropriate tap and fitting tool for each size of coils in the set!---ken

Thanks Ken
I suspected that was case but try to be an optimist  :D
Title: Re: CB750K8 Project
Post by: martin_uk on March 06, 2015, 05:27:43 PM
Helicoil/ V coil inserts and tap arrived today for M4 thread on carb float bowl screw.

(https://farm9.staticflickr.com/8650/16548613849_857b67d566.jpg) (https://flic.kr/p/rdkYmr)2015_0306seat0018 (https://flic.kr/p/rdkYmr) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm9.staticflickr.com/8676/16547295720_51a9a2c4c2.jpg) (https://flic.kr/p/rdedw5)2015_0306seat0015 (https://flic.kr/p/rdedw5) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Thread cut

(https://farm9.staticflickr.com/8571/16547307970_bd40dc011d.jpg) (https://flic.kr/p/rdehah)2015_0306seat0012 (https://flic.kr/p/rdehah) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Made up inserter tool using ally roofing nail with slot cut in end

(https://farm9.staticflickr.com/8567/16708834196_14e544fd79.jpg) (https://flic.kr/p/rsv9hd)2015_0306seat0019 (https://flic.kr/p/rsv9hd) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm9.staticflickr.com/8607/16527431557_9b08e481ce.jpg) (https://flic.kr/p/rbtpAv)2015_0306seat0020 (https://flic.kr/p/rbtpAv) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Title: Re: CB750K8 Project
Post by: martin_uk on March 06, 2015, 05:30:57 PM
Fitted multi block connectors to handle bar switch looms

(https://farm9.staticflickr.com/8647/16527459997_2d5565032d.jpg) (https://flic.kr/p/rbty3R)2015_0306seat0022 (https://flic.kr/p/rbty3R) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Decided to go with new DSS replica headlamp bowl

Title: Re: CB750K8 Project
Post by: martin_uk on March 11, 2015, 05:19:10 PM
Finished cleaning up the head and found a nasty surprise in exhaust ports :'(

(https://farm8.staticflickr.com/7586/16166351133_84f9b694f0.jpg) (https://flic.kr/p/qCyLXX)2015_0311eng0007 (https://flic.kr/p/qCyLXX) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm9.staticflickr.com/8714/16166355443_f3ffe66771.jpg) (https://flic.kr/p/qCyNfg)2015_0311eng0008 (https://flic.kr/p/qCyNfg) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Very deep pitting, Im guessing caused by resting water over a long period of storage?

The head on K8 has F type exhaust fitting, but is not marked like a F1 with 392 cast mark,  but has K8 hand stamped.

(https://farm8.staticflickr.com/7650/16598700938_d7aec847f7.jpg) (https://flic.kr/p/rhLFuW)2015_0311eng0009 (https://flic.kr/p/rhLFuW) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7639/16163962374_ef405d67e7.jpg) (https://flic.kr/p/qCmwSs)2015_0311eng0011 (https://flic.kr/p/qCmwSs) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Looks like I need to find another K8 or F1 head, as its going to be alot of work to weld up unless anyone knows of a fix to seal pitting and can cope with heat?
Title: Re: CB750K8 Project
Post by: Trigger on March 11, 2015, 07:12:05 PM
Martin, I cant really see from your pictures on how bad the ex ports are. If they are pitted, try to gas flow the ports.
Title: Re: CB750K8 Project
Post by: martin_uk on March 12, 2015, 05:45:18 PM
Picked up tank, petrol flap and side covers today ;D

Images dont fully show how good the colour is, as it really sparkles.

(https://farm9.staticflickr.com/8685/16794294552_39fdfb8a0a.jpg) (https://flic.kr/p/rA49EC)2015_0312tank0006 (https://flic.kr/p/rA49EC) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm9.staticflickr.com/8652/16175485103_03a1f5e5f5.jpg) (https://flic.kr/p/qDnAbc)2015_0312tank0001 (https://flic.kr/p/qDnAbc) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm9.staticflickr.com/8606/16588126517_6c2375dd95.jpg) (https://flic.kr/p/rgQu6k)2015_0312tank0004 (https://flic.kr/p/rgQu6k) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm9.staticflickr.com/8754/16794311012_ecf81c9dc5.jpg) (https://flic.kr/p/rA4eyq)2015_0312tank0007 (https://flic.kr/p/rA4eyq) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr
Title: Re: CB750K8 Project
Post by: martin_uk on March 12, 2015, 05:53:24 PM
Martin, I cant really see from your pictures on how bad the ex ports are. If they are pitted, try to gas flow the ports.

I may try grinding back to see how deep they are, could be welded and reground and sealing faces definately need attention.

Considered exhaust paste,  probably would work on the sealing face.

Will ponder ???

Due to get my original F1 crankcase that had broken top right engine mounting back from welders, which will need fettling as well.
Title: Re: CB750K8 Project
Post by: JamesH on March 12, 2015, 06:19:49 PM
Paint's looking lovely martin. Great colour that....
Title: Re: CB750K8 Project
Post by: martin_uk on March 19, 2015, 06:57:28 PM
Paint's looking lovely martin. Great colour that....

Thanks James, I now keep seeing similar colours on new cars  and thinking it was the right decision:)
Title: Re: CB750K8 Project
Post by: martin_uk on March 19, 2015, 07:13:55 PM
Picked up the cylinders after rebore and asked the opinion of guy who is a very experienced engine restorer on exhaust port pitting and after viewing was not concerned, so I just cleaned up with die cutter.

Ended up fitting 2 ex and 2 in valves due to wear at stem top

(https://farm8.staticflickr.com/7622/16678153908_dd235d64c9.jpg) (https://flic.kr/p/rpMU6J)2015_0318eng0013 (https://flic.kr/p/rpMU6J) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

I went to +1mm, because I managed to find original Honda pistons and rings and thought it was overkill, but a shadow of the bore corrosion remains.

The specialist didnt feel it would be a problem so have fitted as they are.

(https://farm8.staticflickr.com/7653/16864618502_f18de8bdf4.jpg) (https://flic.kr/p/rGgzww)2015_0318eng0008 (https://flic.kr/p/rGgzww) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Last CB750 I did found cylinders dropped suddenly whilst assembling so took precaution of using some plastic paper binder cut down to limit travel.

(https://farm9.staticflickr.com/8561/16245794053_3e8307511f.jpg) (https://flic.kr/p/qKzWzt)2015_0318eng0003 (https://flic.kr/p/qKzWzt) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

I used standard piston ring clamps which are a fiddle to remove after piston engaged, so have ordered the Honda part from DSS as I have 2 more engines to do ::)

(https://farm9.staticflickr.com/8638/16678145868_cf1030234a.jpg) (https://flic.kr/p/rpMRH7)2015_0318eng0004 (https://flic.kr/p/rpMRH7) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm9.staticflickr.com/8656/16243407524_0c89cdfeec.jpg) (https://flic.kr/p/qKnH9q)2015_0318eng0019 (https://flic.kr/p/qKnH9q) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr
Title: Re: CB750K8 Project
Post by: bytio on March 19, 2015, 11:28:48 PM
What piston to bore clearance did he do on REBORE?
Title: Re: CB750K8 Project
Post by: martin_uk on March 20, 2015, 09:26:07 AM
What piston to bore clearance did he do on REBORE?

He said Honda clearance very tight, but as he has been doing the Honda engines since the 70's and worked with Dixons racing, left it to him.

I can find out if you need info.
Title: Re: CB750K8 Project
Post by: JamesH on March 20, 2015, 10:05:24 AM
Martin - did you sort a set of  pipes in the end? I came a cross as set of 4 HM405 Original Sankei pipes lurking in the back of my garage last night (don't ask). I bought them to cut-down / modify the silencers for mock-megaphone 4-4 setup but looking at them it would be sacrilege to cut them up.

If interested I'll try and get some pics taken. They owe me a bit mind..

James.
Title: Re: CB750K8 Project
Post by: martin_uk on March 20, 2015, 04:52:46 PM
Martin - did you sort a set of  pipes in the end? I came a cross as set of 4 HM405 Original Sankei pipes lurking in the back of my garage last night (don't ask). I bought them to cut-down / modify the silencers for mock-megaphone 4-4 setup but looking at them it would be sacrilege to cut them up.

If interested I'll try and get some pics taken. They owe me a bit mind..

James.

Hi James
I am 3/4 there  ::)

Just need a HM405  No1 cyl  Left upper marked SL plus exhaust mounting brackets.
Title: Re: CB750K8 Project
Post by: JamesH on March 20, 2015, 05:16:12 PM
That's pretty good. We'll I'll probably photograph them next week and stick them up on evilbay. James.
Title: Re: CB750K8 Project
Post by: SteveD CB500K0 on March 20, 2015, 08:04:57 PM
Every time I see this thread, it reminds me of one of the guys on sohc4.net who rebuilt a K8.

He called it "Kate" (geddit?)

So, are you going to name your bike Martin?
Title: Re: CB750K8 Project
Post by: martin_uk on March 20, 2015, 09:33:46 PM
Every time I see this thread, it reminds me of one of the guys on sohc4.net who rebuilt a K8.

He called it "Kate" (geddit?)

So, are you going to name your bike Martin?

Well I had Norman the Norton, Tommy the Triumph and  Harry the Honda and as I already had a Katy the Caterham,  thought I would call the K8 that f....ing thing I spend all my time and money on  :P
Title: Re: CB750K8 Project
Post by: martin_uk on March 20, 2015, 10:04:03 PM
Cleaned up the cam cover and breather cover and fitted.

Engine is ready to reinstall pending final assembly.

(https://farm9.staticflickr.com/8570/16254141494_56845fbf4d.jpg) (https://flic.kr/p/qLjHYS)2015_0320eng0005 (https://flic.kr/p/qLjHYS) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm9.staticflickr.com/8738/16875508171_a55af1c59b.jpg) (https://flic.kr/p/rHeoDr)2015_0320eng0004 (https://flic.kr/p/rHeoDr) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm9.staticflickr.com/8663/16875504761_f8f0a89362.jpg) (https://flic.kr/p/rHenCD)2015_0320eng0003 (https://flic.kr/p/rHenCD) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm9.staticflickr.com/8684/16669192857_c0b27d1765.jpg) (https://flic.kr/p/roZYhR)2015_0320eng0001 (https://flic.kr/p/roZYhR) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr
Title: Re: CB750K8 Project
Post by: royhall on March 21, 2015, 09:07:58 AM
Martin. Must have missed it in the thread somewhere. Looks from your last picture set that you repainted the insides of the cases for porosity. Am I correct, and if so what paint did you use. Bikes looking superb by the way. Cheers Roy.
Title: Re: CB750K8 Project
Post by: martin_uk on March 21, 2015, 09:47:54 AM
Martin. Must have missed it in the thread somewhere. Looks from your last picture set that you repainted the insides of the cases for porosity. Am I correct, and if so what paint did you use. Bikes looking superb by the way. Cheers Roy.

Hi Roy
Not paint, but as the cases were not vapor blasted, some staining remains that did not come off with solvents.
Title: Re: CB750K8 Project
Post by: martin_uk on March 21, 2015, 07:41:51 PM
Finished the part assembly of engine and ready to fit.

(https://farm8.staticflickr.com/7633/16265272723_0ce6ca55b6.jpg) (https://flic.kr/p/qMiLUB)2015_0321eng0015 (https://flic.kr/p/qMiLUB) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm9.staticflickr.com/8736/16884265431_82e180102a.jpg) (https://flic.kr/p/rJ1gSF)2015_0321eng0014 (https://flic.kr/p/rJ1gSF) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Frame prepped with pipe insulation and plastic waste pipe split and fitted to right bottom rail to protect

(https://farm9.staticflickr.com/8704/16697818900_68060f3c31.jpg) (https://flic.kr/p/rrwFPj)2015_0321eng0016 (https://flic.kr/p/rrwFPj) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Engine went in OK with help of friend on other end of lifting bar, but seem to have lost images ???
Title: Re: CB750K8 Project
Post by: martin_uk on March 21, 2015, 07:45:49 PM
Dismantled oil pump.

It doesnt look as if dismantled before, but dot on rotors on opposite sides for first rotor then on same side for second by drive gear?

(https://farm9.staticflickr.com/8737/16677920317_319a8c7d5a.jpg) (https://flic.kr/p/rpLGEi)2015_0321eng0001 (https://flic.kr/p/rpLGEi) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7649/16859333686_5c5d4ccd89.jpg) (https://flic.kr/p/rFNux1)2015_0321eng0009 (https://flic.kr/p/rFNux1) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7597/16697829180_8d2b9573a0.jpg) (https://flic.kr/p/rrwJSy)2015_0321eng0011 (https://flic.kr/p/rrwJSy) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr
Title: Re: CB750K8 Project
Post by: Trigger on March 21, 2015, 07:46:01 PM
That is a very strange way to fit a engine Martin  ;D
Title: Re: CB750K8 Project
Post by: martin_uk on March 21, 2015, 07:50:42 PM
I bought a K7 brake master cylinder and new genuine stop switch, but no provision for fitting  :-[

Decided to go with replica DSS unit and banjo bolt switch from China, with made up wiring loom.

(https://farm9.staticflickr.com/8755/16265248953_4fb57f6fa2.jpg) (https://flic.kr/p/qMiDQM)2015_0321eng0004 (https://flic.kr/p/qMiDQM) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Seems to work OK
Title: Re: CB750K8 Project
Post by: martin_uk on March 21, 2015, 07:53:12 PM
That is a very strange way to fit a engine Martin  ;D

I know, but its a lot lighter and just means I fit the alternator, clutch and covers once its in.
Title: Re: CB750K8 Project
Post by: martin_uk on March 22, 2015, 09:28:12 AM
That is a very strange way to fit a engine Martin  ;D

I know, but its a lot lighter and just means I fit the alternator, clutch and covers once its in.

I would add, that I would not do this way without a bike lift that means you can work at bench height when fitting the remainder of parts.
Title: Re: CB750K8 Project
Post by: martin_uk on March 28, 2015, 09:49:54 PM
Made quite a bit of progress, but seem to have problem importing images from my camera.

Engine fitted up apart from carbs, as just realised the K7/8 had differentent rubber mounts which are on back order :(

Managed to clear blockage on accelerator jets.

Clutch assembly slightly caught me out as the rear ally plate with the spring pillars had not engaged in outer splines.

So if you find spring bolts seem too short to engage with pillars, may be the problem.

I stripped oil pump and found rotor lobe damage so swapped with a good used one (thanks Bryanj)

Put in engine oil, initial  3 ltrs of running in oil, which should help the rings bed in.

Tried spinning up engine  with plugs out, but no drop in oil level and oil light still on.

Dont like starting without pressure present, but having  prlmed pump, may have to, athough may try pressuring oil tank via beather pipe,  which worked on last bike.
Title: Re: CB750K8 Project
Post by: martin_uk on March 28, 2015, 09:55:22 PM
Decided to try the method used before to fully prime oil system, I used a car tubeless tyre valve with end cut off and fitted into end of tube same size as breather tube on oil tank  clamped with Jubilee clip.

After pressurising with air line and a few spins of engine the oil light went out.

Removed pressure and oil light goes out each time engine spun ;D

Plugs in and just waiting on DSS supplying the carb mounting rubbers.

As I am missing one standard exhaust, started to fit a new  Motad I bought. but numbering of pipes seems wrong ie 1 is not left front?
Title: Re: CB750K8 Project
Post by: Waggles on March 30, 2015, 02:01:04 PM
I am afraid I binned the MOTAD instructions so can't confirm but I THINK the numbering was more about where the tube fits into the collector.
Title: Re: CB750K8 Project
Post by: martin_uk on March 30, 2015, 02:36:32 PM
Extra earth points, which connect to battery earth terminal.

(https://farm8.staticflickr.com/7286/16770868177_c6382b68e4.jpg) (https://flic.kr/p/rxZ5PB)2015_0330eng0009 (https://flic.kr/p/rxZ5PB) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7592/16977316441_4e0c7ce237.jpg) (https://flic.kr/p/rSebGr)2015_0330eng0010 (https://flic.kr/p/rSebGr) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

I considered replacing the original green heat shrink , but would have meant cutting off ring terminal.

Black sheath covering extra earth lead.

The double sided velcro holding loom is just temporary until all the cable runs finalised :D

(https://farm9.staticflickr.com/8707/16952227986_b0d6bc05c8.jpg) (https://flic.kr/p/rQ1ALS)2015_0330eng0011 (https://flic.kr/p/rQ1ALS) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr
Title: Re: CB750K8 Project
Post by: martin_uk on March 30, 2015, 02:42:08 PM
Looking better

(https://farm8.staticflickr.com/7650/16952232706_a1a5cb8ee3.jpg) (https://flic.kr/p/rQ1Cbf)2015_0330eng0013 (https://flic.kr/p/rQ1Cbf) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7604/16792021069_7fd2ca5a42.jpg) (https://flic.kr/p/rzRuQD)2015_0330eng0016 (https://flic.kr/p/rzRuQD) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7282/16952242356_505e4b7d40.jpg) (https://flic.kr/p/rQ1F3C)2015_0330eng0017 (https://flic.kr/p/rQ1F3C) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm9.staticflickr.com/8699/16790512098_8d8b0b960b.jpg) (https://flic.kr/p/rzHLgU)2015_0330eng0018 (https://flic.kr/p/rzHLgU) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7630/16355824954_ca34e81c9b.jpg) (https://flic.kr/p/qViSVY)2015_0330eng0020 (https://flic.kr/p/qViSVY) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm9.staticflickr.com/8754/16978207015_5ea6b2db64.jpg) (https://flic.kr/p/rSiKra)2015_0330eng0023 (https://flic.kr/p/rSiKra) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

I think these cables may be too short with K8 bars

Title: Re: CB750K8 Project
Post by: Bitsa (Ralph Wright - RIP) on March 30, 2015, 07:15:32 PM
me thinks so too
Cheers
Bitsa
Title: Re: CB750K8 Project
Post by: Trigger on March 30, 2015, 08:14:46 PM
me thinks so too
Cheers
Bitsa

Bitsa keeps doing that as well  ;D ;D ;D
Title: Re: CB750K8 Project
Post by: martin_uk on March 31, 2015, 04:40:25 PM
Found the Motad instructions, but the flared tube spacer (head rings) used instead of collets is too long to use the aluminium collars/clamps supplied.

Motad recommend fitting No 1 and 4 pipes to head then installing the silencer and finally 2 and 3 to silencer/head.

Looking from front to rear the tubes are numbered.

4 1
 3 2

I bought the Motad as being suitable for F1 and as the K8 has same type exhaust fitting thought might fit, but with change to silencer mount and centre stand stop.

Any close up images of Motad fitted to K7/8 appreciated.

Title: Re: CB750K8 Project
Post by: martin_uk on April 01, 2015, 05:12:21 PM
me thinks so too
Cheers
Bitsa

Bitsa keeps doing that as well  ;D ;D ;D

Just checked with DSS and advise same cables on K8 as European bars, but only genuine quoted at around £60 plus not  stocked  :o

Any recommended supplier for longer cables for high bars on PD carbs?
Title: Re: CB750K8 Project
Post by: Drew400 on April 02, 2015, 01:22:19 PM
Hi Martin,

I have no expertise to add, but just wanted to acknowledge your good work and the great pictorial story you are creating.

Makes my recent work on a 400 look rather easy!

Cheers, D.
Title: Re: CB750K8 Project
Post by: martin_uk on April 05, 2015, 04:16:47 PM
Hi Martin,

I have no expertise to add, but just wanted to acknowledge your good work and the great pictorial story you are creating.

Makes my recent work on a 400 look rather easy!

Cheers, D.

Thanks Drew
Title: Re: CB750K8 Project
Post by: martin_uk on April 05, 2015, 04:23:31 PM
Bike did not come with carbs so had to buy some.

They were in pretty good condition, but cleaned out and debating whether to remove the press fit idle jets on PD carb.

Glad I did as came out easier than expected, using parallel pliers. Quite a build up of crud and would have meant carbs would not run right, pics to follow.

Cruisin Image float bowl seals expanded after testing the accelerator jets/float valves, but hopefully will shrink after leaving for a day or two.

Hopefully carb mounting rubbers will arrive this week and can try firing up ;D
Title: Re: CB750K8 Project
Post by: martin_uk on April 07, 2015, 10:08:39 PM
Started fitting the Motad 4 into 1 but found the collars too long to fit with clamps supplied  :(



(https://farm9.staticflickr.com/8734/17070629945_7442c04615.jpg) (https://flic.kr/p/s1trxX)2015_0407eng0001 (https://flic.kr/p/s1trxX) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Ended up using split collars from an F1 with the Motad clamps.

(https://farm9.staticflickr.com/8806/16863268377_ed7c813273.jpg) (https://flic.kr/p/rG9Ebv)2015_0407eng0013 (https://flic.kr/p/rG9Ebv) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Carb insulators arrived today so fiited carbs,

(https://farm8.staticflickr.com/7631/17044695476_4d14efd3ea.jpg) (https://flic.kr/p/rYbw8W)2015_0407eng0010 (https://flic.kr/p/rYbw8W) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm9.staticflickr.com/8786/16450539033_a790934285.jpg) (https://flic.kr/p/r4Fj8k)2015_0407eng0008 (https://flic.kr/p/r4Fj8k) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Engine fired up straight away and sounds good  ;D

Its always a relief, now need to adjust the carbs.

(https://farm8.staticflickr.com/7717/17070680495_d12dd6431c.jpg) (https://flic.kr/p/s1tGzv)2015_0407eng0009 (https://flic.kr/p/s1tGzv) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr
 
Title: Re: CB750K8 Project
Post by: martin_uk on April 07, 2015, 10:11:47 PM
Bike did not come with carbs so had to buy some.

They were in pretty good condition, but cleaned out and debating whether to remove the press fit idle jets on PD carb.

Glad I did as came out easier than expected, using parallel pliers. Quite a build up of crud and would have meant carbs would not run right, pics to follow.

Cruisin Image float bowl seals expanded after testing the accelerator jets/float valves, but hopefully will shrink after leaving for a day or two.

Hopefully carb mounting rubbers will arrive this week and can try firing up ;D

(https://farm9.staticflickr.com/8806/16883113570_c19ebf3ec4.jpg) (https://flic.kr/p/rHUnt1)2015_0407eng0007 (https://flic.kr/p/rHUnt1) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm9.staticflickr.com/8808/17069174092_3ee4b9e179.jpg) (https://flic.kr/p/s1kYM3)2015_0407eng0006 (https://flic.kr/p/s1kYM3) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Marks are where I tried ordinary pliers

(https://farm9.staticflickr.com/8746/17044733876_01764aa620.jpg) (https://flic.kr/p/rYbHy1)2015_0407eng0003 (https://flic.kr/p/rYbHy1) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Title: Re: CB750K8 Project
Post by: martin_uk on April 19, 2015, 11:35:53 AM
Spoke to Motad about exhaust and they have sent me 4 shorter head rings/collars and an F1 silencer mount as I had a K6 supplied.

In the end decided to fit the Marshals system I bought from Pete and looks and fits much nicer, with more access to oil filter.

Will use Motad on one of F1's.

(https://farm8.staticflickr.com/7627/17195785522_de4220f406.jpg) (https://flic.kr/p/scwTWJ)2015_0418eng0032 (https://flic.kr/p/scwTWJ) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7646/17009951040_33fe3b5f9c.jpg) (https://flic.kr/p/rV7rPW)2015_0418eng0007 (https://flic.kr/p/rV7rPW) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7681/16990054027_248c2af84c.jpg) (https://flic.kr/p/rTmt8Z)2015_0418eng0009 (https://flic.kr/p/rTmt8Z) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

The stand stop.

(https://farm9.staticflickr.com/8731/17009733348_22d292197f.jpg) (https://flic.kr/p/rV6k7C)2015_0418eng0010 (https://flic.kr/p/rV6k7C) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7640/16575013684_be74a7d58f.jpg) (https://flic.kr/p/rfFh71)2015_0418eng0029 (https://flic.kr/p/rfFh71) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr



Title: Re: CB750K8 Project
Post by: martin_uk on April 19, 2015, 11:51:07 AM
Not too much to do now, but cant easily get the correct length throttle cables in UK and have it booked in for MOT on Friday, to enable me to register here.

Have used shortest route, with cables I have but may be a problem with tanks fitted.

(https://farm8.staticflickr.com/7655/17011278519_bb72897662.jpg) (https://flic.kr/p/rVefrv)2015_0418eng0019 (https://flic.kr/p/rVefrv) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr


(https://farm8.staticflickr.com/7612/17011314639_1a61c4eb06.jpg) (https://flic.kr/p/rVerbg)2015_0418eng0018 (https://flic.kr/p/rVerbg) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7635/17195759882_931ffae6ae.jpg) (https://flic.kr/p/scwLjE)2015_0418eng0016 (https://flic.kr/p/scwLjE) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm9.staticflickr.com/8794/17011274309_489391b081.jpg) (https://flic.kr/p/rVeebV)2015_0418eng0017 (https://flic.kr/p/rVeebV) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr
Title: Re: CB750K8 Project
Post by: martin_uk on April 19, 2015, 11:58:13 AM
Bike has PD carbs which I have not worked on before and were missing from bike!

Had a problem with choke as not fully closing butterflies and no fast idle.

Found the problem was with jamming linkage as this swivels, so after carefully bending it now works with fast idle of 3k

(https://farm8.staticflickr.com/7611/17009669928_795bc29f3c.jpg) (https://flic.kr/p/rV61gb)2015_0418eng0013 (https://flic.kr/p/rV61gb) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7616/17011318749_bef2aedc3a.jpg) (https://flic.kr/p/rVesp8)2015_0418eng0015 (https://flic.kr/p/rVesp8) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Also decided to splash out on a new front mudguard as DSS seem to have reduced genuine price to £125 plus vat

(https://farm8.staticflickr.com/7682/17197449335_1347782d45.jpg) (https://flic.kr/p/scFqxa)2015_0418eng0026 (https://flic.kr/p/scFqxa) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr
Title: Re: CB750K8 Project
Post by: martin_uk on April 19, 2015, 11:59:10 AM
Bike has PD carbs which I have not worked on before and were missing from bike!

Had a problem with choke as not fully closing butterflies and no fast idle.

Found the problem was with jamming linkage as this swivels, so after carefully bending it now works with fast idle of 3k

(https://farm8.staticflickr.com/7611/17009669928_795bc29f3c.jpg) (https://flic.kr/p/rV61gb)2015_0418eng0013 (https://flic.kr/p/rV61gb) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7616/17011318749_bef2aedc3a.jpg) (https://flic.kr/p/rVesp8)2015_0418eng0015 (https://flic.kr/p/rVesp8) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Also decided to splash out on a new front mudguard as DSS seem to have reduced genuine price to £125 plus vat

(https://farm8.staticflickr.com/7682/17197449335_1347782d45.jpg) (https://flic.kr/p/scFqxa)2015_0418eng0026 (https://flic.kr/p/scFqxa) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr
Title: Re: CB750K8 Project
Post by: martin_uk on April 19, 2015, 12:04:56 PM
My oil gallery cap was damaged and originals are quite expensive, so tried this ally sump plug (Subaru aftermarket) which has a built in magnet to catch stray metal particals.

Used a dowty washer to seal.

(https://farm8.staticflickr.com/7651/16990033347_3f5d511a73.jpg) (https://flic.kr/p/rTmmZr)2015_0418eng0022 (https://flic.kr/p/rTmmZr) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr
Title: Re: CB750K8 Project
Post by: martin_uk on April 19, 2015, 08:41:18 PM
I get paranoid about damaging new paint :-X

(https://farm9.staticflickr.com/8745/17176923506_9679c34a1a.jpg) (https://flic.kr/p/saSdVy)2015_0419tank0001 (https://flic.kr/p/saSdVy) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7705/17201237892_3f22584bbd.jpg) (https://flic.kr/p/sd1QK7)2015_0419tank0002 (https://flic.kr/p/sd1QK7) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7648/17202283701_4f5a6af197.jpg) (https://flic.kr/p/sd7cCi)2015_0419tank0004 (https://flic.kr/p/sd7cCi) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm9.staticflickr.com/8799/16995463007_b321ec506d.jpg) (https://flic.kr/p/rTQc3g)2015_0419tank0007 (https://flic.kr/p/rTQc3g) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

(https://farm8.staticflickr.com/7683/17202878545_80b40f519f.jpg) (https://flic.kr/p/sdafse)2015_0419tank0006 (https://flic.kr/p/sdafse) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Early CG125 Honda emblem  :o

(https://farm9.staticflickr.com/8733/16582674713_8b6e9ee7f3.jpg) (https://flic.kr/p/rgmxsH)2015_0419tank0013 (https://flic.kr/p/rgmxsH) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Throttle cables not ideal but dont catch lock to lock.

Title: Re: CB750K8 Project
Post by: Bryanj on April 20, 2015, 07:49:48 AM
Careful they don't pull tight on one lock and cause the revs to rise as that is a failure as well
Title: Re: CB750K8 Project
Post by: martin_uk on April 20, 2015, 03:46:55 PM
Careful they don't pull tight on one lock and cause the revs to rise as that is a failure as well

That was my concern, but seem OK.
Title: Re: CB750K8 Project
Post by: martin_uk on April 20, 2015, 05:24:57 PM
Cable run

(https://farm8.staticflickr.com/7698/16593247513_f9db7199bb.jpg) (https://flic.kr/p/rhhJon)2015_04202final0005 (https://flic.kr/p/rhhJon) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

Finishing touches

(https://farm8.staticflickr.com/7646/17213467045_efbfe655b5.jpg) (https://flic.kr/p/se6w3z)2015_04202final0001 (https://flic.kr/p/se6w3z) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

I had to keep them seperate, but now the brothers can meet  ???

(https://farm9.staticflickr.com/8700/17025702768_89464eeffc.jpg) (https://flic.kr/p/rWvbgs)2015_04202final0003 (https://flic.kr/p/rWvbgs) by nitram2010 (https://www.flickr.com/people/46578358@N07/), on Flickr

I am using a temporary seat and have a replica one on order at DSS, but may see if old one can be repaired.

Have left side panel badges and tank decal for the moment and am still on look out for an original No1 (left upper) exhaust, but quite like the Marshal.

Its insured on VIN and MOT Friday, hopefully OK then run the gauntlet of DVLA registration ::)

On to the next one  ;D
Title: Re: CB750K8 Project
Post by: UK Pete on April 20, 2015, 06:01:33 PM
Great work Martin, they look perfect, i would love to get some of your motivation, it seems to come to me in spurts, right now i have no interest whatsoever in bikes,
pete
Title: Re: CB750K8 Project
Post by: martin_uk on April 20, 2015, 06:14:24 PM
Great work Martin, they look perfect, i would love to get some of your motivation, it seems to come to me in spurts, right now i have no interest whatsoever in bikes,
pete

Thanks Pete, good to hear from you and thanks for the exhaust, looks great.

I know what you mean, as I stopped rebuilding bikes when I had back problems and thought that was the end of it, but now I dont work so much or do the 40k miles pa, plus bought a bike lift and Im raring to go ;D

Title: Re: CB750K8 Project
Post by: Green1 on April 20, 2015, 07:38:26 PM
Bikes look great Martin the red really suits the later K's

Mick
Title: Re: CB750K8 Project
Post by: martin_uk on April 21, 2015, 04:15:02 PM
Bikes look great Martin the red really suits the later K's

Mick

Thanks Mick, by coincidence a colleague at work showed me his recent purchase, a Honda Pan european about 20 years old and almost same colour as mine.
Title: Re: CB750K8 Project
Post by: royhall on April 23, 2015, 02:23:41 PM
What a fabulous pair of bikes. And finished soooo quick. Nice one Martin.
Title: Re: CB750K8 Project
Post by: martin_uk on April 23, 2015, 05:02:31 PM
What a fabulous pair of bikes. And finished soooo quick. Nice one Martin.

Hope to add a Cafe Racer F1 in about 3 months ;D

Hope the first MOT goes OK Friday  ::)
Title: Re: CB750K8 Project
Post by: Trigger on April 23, 2015, 05:49:38 PM
Nice Job Martin.
Title: Re: CB750K8 Project
Post by: Bitsa (Ralph Wright - RIP) on April 24, 2015, 09:53:46 AM
Agree with Roy lovely jubbly
Cheers
Bitsa
Title: Re: CB750K8 Project
Post by: JamesH on April 24, 2015, 10:07:37 AM
Superb work on these Martin, well done mate. If you're ever down in Brighton on a ride-out give me shout. James.
Title: Re: CB750K8 Project
Post by: martin_uk on April 24, 2015, 10:57:36 AM
Thanks guys for all the positive comments and encouragement ;D

MOT went fine although had a anxious moment on the way.

Got about 2 miles and engine spluttered to a halt, I thought shit!

I had put in a gallon of petrol and was already on reserve, so tipped bike over to left to try to get more fuel to tap side,

This did the trick and was able to get to petrol station  ;D

Title: Re: CB750K8 Project
Post by: martin_uk on May 07, 2015, 02:21:38 PM
New V5 came through today, not bad, just under 2 weeks, with a Bank Holiday in between!

Have updated insurance to new T reg, just waiting for number plate to come through.
Title: Re: CB750K8 Project
Post by: haynes66 on May 19, 2015, 05:03:05 PM
could i ask who did your cadmium plating? thanks.
Title: Re: CB750K8 Project
Post by: martin_uk on May 19, 2015, 05:27:58 PM
could i ask who did your cadmium plating? thanks.

Its Zinc, as I believe Cadnium was stopped due to environmental/H&S issues.

http://www.mercuryelectroplating.com/ (http://www.mercuryelectroplating.com/)

Around £30 for a shoe box size batch.
Title: Re: CB750K8 Project
Post by: haynes66 on May 19, 2015, 05:47:03 PM
brilliant, thanks.
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