Author Topic: K1 full restoration begins  (Read 7274 times)

Offline WestYorkshireBiker

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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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Offline Bryanj

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Re: K1 full restoration begins
« Reply #1 on: July 11, 2020, 06:05:33 PM »
Brute force, ignorance and a big box of esastoplast, prefer fabric ones they soalk up the oil and hide the blood

Offline Johnwebley

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Re: K1 full restoration begins
« Reply #2 on: July 11, 2020, 06:06:16 PM »
Use a hot air gun to warm the rubbers.



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Offline WestYorkshireBiker

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Re: K1 full restoration begins
« Reply #3 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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Offline Trigger

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Re: K1 full restoration begins
« Reply #4 on: July 11, 2020, 08:06:24 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

Offline WestYorkshireBiker

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Re: K1 full restoration begins
« Reply #5 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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Offline WestYorkshireBiker

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Re: K1 full restoration begins
« Reply #6 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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Offline leadnavel

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Re: K1 full restoration begins
« Reply #7 on: July 13, 2020, 04:27:51 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.


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Offline WestYorkshireBiker

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Re: K1 full restoration begins
« Reply #8 on: July 13, 2020, 04:37:36 PM »
I got it from @Nurse Julie on this very forum. Thanks.

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Offline MrDavo

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Re: K1 full restoration begins
« Reply #9 on: July 13, 2020, 04:43:34 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.

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Offline WestYorkshireBiker

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Re: K1 full restoration begins
« Reply #10 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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Offline AshimotoK0

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Re: K1 full restoration begins
« Reply #11 on: July 13, 2020, 07:23:12 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.

[ Guests cannot view attachments ]


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
« Last Edit: July 13, 2020, 07:28:13 PM by AshimotoK0 »
“Alright friends, you have seen the heavy groups, now you will see morning maniac music. Believe me, yeah. It’s a new dawn.” Grace Slick, Woodstock '69 .. In the year of the Sandcast.

Offline WestYorkshireBiker

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Re: K1 full restoration begins
« Reply #12 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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« Last Edit: July 13, 2020, 08:23:34 PM by WestYorkshireBiker »
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Offline AshimotoK0

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Re: K1 full restoration begins
« Reply #13 on: July 13, 2020, 08:47:46 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.

This may help

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« Last Edit: July 13, 2020, 08:54:21 PM by AshimotoK0 »
“Alright friends, you have seen the heavy groups, now you will see morning maniac music. Believe me, yeah. It’s a new dawn.” Grace Slick, Woodstock '69 .. In the year of the Sandcast.

Offline WestYorkshireBiker

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Re: K1 full restoration begins
« Reply #14 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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