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Messages - WestYorkshireBiker

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46
Project Board / Re: K1 full restoration begins
« on: July 13, 2020, 08:58:20 PM »
See modified post above for colour diagram
Thanks Ash. I was trying to find that but couldn't remember where it was.(the mega manual I guess!).

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47
Project Board / Re: K1 full restoration begins
« on: July 13, 2020, 08:54:48 PM »
What's the colour of the wires ? There should be a double bullet connector like that with Black/white tracer which is +12v  feed to both coils from the kill switch. If its black may be horn 12v feed. A long time since I wired a 750 though so maybe someone else can chip in.
It's black. I'll check the horn but it looked to have the earth and live wired up. As the could have been hacked at some point ( I managed to trace the wires for the live to both). I'll check again tomorrow as I'm knackered now. Onwards and upwards...

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48
Project Board / Re: K1 full restoration begins
« on: July 13, 2020, 08:20:39 PM »
Good luck with your project, do you have the spec for your engine stand? I could do with one of those for my K7 engine rebuild.

Yea nice looking project there and ...... another Yorkshireman   ;D ;D

This was one of my 'lockdown' projects. a DIY stand made with big boys Meccano ... I made brackets to suit engines from S90 up to CB750..totally adjustable and has been a absolute  boon for engine building.

(Attachment Link)


Manuals here if you dont have them (Genuine & Haynes). The MEGA downoad one is he one I use most.

HONDA CB750 SOHC FOUR

MEGA CB750K /F PARTS MANUALS SHOP MANUALS VJMC ARTICLES ETC ETC … WELL WORTH DOWNLOADING. MASSIVE DOWLOAD THOUGH!!

NOTE : This starts with the Service manual and the Parts lists are later on in the download beginning with later model Parts list K3->K5 and then K0->K2 . Please  PM me for the very early  Sandcast 4/69 Parts Manual link as it is not included in the links on here.

https://www.dropbox.com/s/anpzqn2r55f1o9k/CB750%20Mega%20Parts%20Service%20and%20More.pdf?dl=0

CB750 K0-.K8, F SHOP MANUAL

https://www.dropbox.com/s/nxt8v8xcvnvnpz0/Honda%20CB750%20SOHC%20K0-K8%20F1-F3%20Shop%20Manual.pdf?dl=0

CB750K Haynes Manual

https://www.dropbox.com/s/zxg25whp5gyr97a/CB750_HNS_Shop_Man.pdf?dl=0

CB750 F2-3 Parts Manual

https://www.dropbox.com/sh/l5oaiythibeg7dm/AAAwXNQKWFIHdDJmfRVBGRs8a?dl=0

CB750F1 PARTS MANUAL

https://www.dropbox.com/s/hwpqt3rod8m01am/Honda%20CB750%20Four%20CB%20750%20F1%20Illustrated%20Parts%20List%20Diagram%20Manual.pdf?dl=0


CB750 SERVICE BULLETINS -- Collected over many years by Bryan Jones ... MASSIVE THANKS BRYAN

https://www.dropbox.com/s/xkkwyl5lteti976/CB750%20Service%20Bulletins.pdf?dl=0

CB750K7 Dealer Setup instructions ..courtest AndyD

https://www.dropbox.com/s/7dt3z3pd5u37snh/CB750%20setup.pdf?dl=0

CB750 Sandcast Restorers Reference

https://www.dropbox.com/sh/s391rvkoylest0z/AAAhoNiIXbv8P_zxRNGS1Hvqa?dl=0


CB750K6
https://www.bike-parts-honda.com/Catalog/Honda/0750_CB750K6_Microfiches_Honda/parts_list_0750_CB750K6.html
CB750K7 K8
https://www.bike-parts-honda.com/Catalog/Honda/0750_CB750K7_K8_Microfiches_Honda/parts_list_0750_CB750K7_K8.html
CB750F2 F3



Archive of Greenbushacres site with CB750 Service Bulletins etc.

https://web.archive.org/web/20150904205939/http://greenbushacres.ca/Motorcycles/Technical/Technical.html


CB750 HISTORY AND SPECS

https://www.dropbox.com/s/bt8gpfiu2h3n2kq/Honda%20CB750%20CB%20750%20SOHC4%20History%20%26%20Specifications.pdf?dl=0


CR750 Parts List

https://www.dropbox.com/s/w128vp6hqpxgpyr/HondaCR750partslist.pdf?dl=0
CB750 1970 Test MCM

https://www.dropbox.com/s/4zwa2q1lpk3s63r/CB750%201970%20UK%20report.pdf?dl=0
Thanks Ash. Got all the links and bought the Hondaman book for a desktop reference. Awesome stand!! Just going through the wiring at the moment just to get an idea of what goes where. Bit lost where this wire goes. Looks to have been unplugged for ages as it's corroded. Coil wires look Ok (been hacked at some point).

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49
Project Board / Re: K1 full restoration begins
« on: July 13, 2020, 04:54:02 PM »
Quote
do you have the spec for your engine stand? I could do with one of those for my K7 engine rebuild.

Trigger may be along soon to offer to flog you one - I can recommend them, weirdly, as well as my CB750 mine also fit my CL450 engine.
Yeah sorry it's Trigger who makes them. Very well built. Will save me a ton of hassle I reckon

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50
Project Board / Re: K1 full restoration begins
« on: July 13, 2020, 04:37:36 PM »
I got it from @Nurse Julie on this very forum. Thanks.

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51
Project Board / Re: K1 full restoration begins
« on: July 12, 2020, 08:12:43 PM »
Now looks more like a 'naked' bike after a few choice words with the carbs and oil filter!!!! Bloody bolt was rounded and wouldn't budge without a chisel!

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52
Project Board / Re: K1 full restoration begins
« on: July 11, 2020, 08:25:28 PM »
Nice looking K1, Airbox is easy on a 750 sohc. Comes out the left side and if you take the bottom part off, comes out even easier  ;)
I have never read that book, or any other book  :o
Thanks. I got the bottom bit off so I'll do the top from the left (as I did the bottom on the right!!) tomorrow. I do like reading a good manual before doing work (nerd alert). Also your engine stand is finally being used!! I'll probably be in touch over the next few weeks as I'll be needing some engine work doing I suspect. The bike has a K6 with the K1 in bits (no idea why tbh at the moment).! So I'm looking to rebuild the K1 and get her back to her former glory (and have matching engine/frame etc).  Cheers.

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53
Project Board / Re: K1 full restoration begins
« on: July 11, 2020, 06:06:54 PM »
Brute force, ignorance and a big box of esastoplast, prefer fabric ones they soalk up the oil and hide the blood
Yeah that's what I thought. Have to get the hairdryer out to warm the rubber inlets I guess.

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54
Project Board / K1 full restoration begins
« on: July 11, 2020, 06:02:45 PM »
Just starting on my first ever restoration. Following the excellent Hondaman book as I go. Going Ok so far. Any tips on getting the air filter and carbs off as that's tomorrows job!!

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55
Anorak's Corner / Re: Tap n die set recommendations
« on: June 30, 2020, 08:32:28 PM »
Thanks. Brilliant info.

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56
Anorak's Corner / Re: Tap n die set recommendations
« on: June 30, 2020, 11:15:14 AM »
If you want a selection of taps and dies Tracy Tools have some for £20. You can also call them for a chat to discuss exactly what you need. They have been around for years and are a reccomended source of quality engineering taps and dies. I've used them many times and never had a problem with the quality of their tools.
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&cad=rja&uact=8&ved=2ahUKEwikiOqIpanqAhUsQhUIHc5LDjQQFjAAegQIARAD&url=https%3A%2F%2Fwww.tracytools.com%2F&usg=AOvVaw0SKoLqgxcwMYaqtZpNffdU
Perfect. Thanks Dave.

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57
Anorak's Corner / Re: Tap n die set recommendations
« on: June 30, 2020, 11:10:11 AM »
Honda used some non prefered pitch threads, but still standard, in some places.
In all honesty i would buy just the sizes you need as some will need repair so you need helicoil kits anyway.

Most used size would be 6 x 1 and if its just a repair a plug tap will do but to tap a blind hole you need a taper first.

Tell me what you want to repair and ill tell you what sizes you need
Thanks. I don't have the bike yet but I'm getting some tools etc bought so I'll probably just get a standard set and buy what I need when I need it I guess. It's more what decent makes to look for tbh. Amazon and eBay recommendations seem to vary on whatever I look at.

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58
Anorak's Corner / Tap n die set recommendations
« on: June 30, 2020, 10:55:00 AM »
Looking for a good quality tap n die set and don't want to get cheap eBay crap. Also what sets are needed for Honda's as I've read there's some JIS threads which have a different pitch to normal metric? The bike I'm getting I know for a fact has a broken head bolt so need help getting the right gear chaps. Thanks.

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59
CB750 / Re: Engine shop recommendations West Yorkshire
« on: June 19, 2020, 08:01:02 AM »
Sounds like I'll get in touch with Trigger if needed then. Thanks for all the info guys/gals. Now all I need to do is buy the bloody bike!

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60
CB750 / Re: Engine shop recommendations West Yorkshire
« on: June 19, 2020, 05:04:58 AM »
I agree with Ash, be very careful of engineering firms who undertake rebores on Jap bikes. I had an engine rebored and advised the engineer of the Honda specification for the piston to bore clearance. The engineer rebored the barrel oversize. When I asked why he told me the piston would sieze if he bored the barrel to the Honda spec! Result: the engine used so much oil so quickly it siezed! I had to find another barrel, a new piston, rebuild the crank, new con-rod and regrind of the cam as a result. I went to another company to get the rebore the second time! A very expensive lesson.
I have never personally used Trigger but I would have no hesitation to do so in the future, he knows these engines better than anyone else.
Good luck with your quest to buy a sohc, you won't be disappointed .
Thanks Dave. Very useful to know all this. Sounds like you had a nightmare with yours !!

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