Honda-SOHC

SOHC.co.uk Forums => CB750 => Topic started by: JamesH on October 14, 2014, 01:46:22 PM

Title: CB750 K0 Diecast Carb Restoration
Post by: JamesH on October 14, 2014, 01:46:22 PM: Just starting to strip / refurbish a set of CB750 K0 carbs so thought I'd start documenting it here for whomever might be vaguely interested...

Firstly, a MASSIVE thanks to Bitsa (Ralph) for sourcing these for me - a true gent, thanks again Bitsa.

Have started the strip-down last night in prep for cleaning in my ultrasonic bath. Overall the set is in lovely original condition - you can even see a hint of rainbow / mother of pearl type finish on the original body castings - a nice sign of an original unrestored set.

Unfortunately the main alloy carb plate was fractured in transport - nothing to do with the way they were packaged, probably more down to Parcelforce monkeys but ho-hum. I'll either source a good used part or use on of these for the rebuild of this particular set: http://www.ebay.co.uk/itm/181312295606?_trksid=p2055119.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT

Some photos of the set and strip down:

(http://tapatalk.imageshack.com/v2/14/10/14/f4bed6500a86bbee3dece97bed0505aa.jpg)

(http://tapatalk.imageshack.com/v2/14/10/14/d0b175cbc67cae21b3e7997c202da41d.jpg)

(http://tapatalk.imageshack.com/v2/14/10/14/02986ad02d11780e8346f76c2dc0225b.jpg)

(http://tapatalk.imageshack.com/v2/14/10/14/c75761354c6e69b1b3a41e35006947eb.jpg)

(http://tapatalk.imageshack.com/v2/14/10/14/905ae4fdcb9afa48430a51c64ba4bc4a.jpg)

(http://tapatalk.imageshack.com/v2/14/10/14/e3bd650bb5a983440c026853d6ce55f2.jpg)

(http://tapatalk.imageshack.com/v2/14/10/14/17df5f07edf4c679d831a271da5f31fc.jpg)

(http://tapatalk.imageshack.com/v2/14/10/14/67cc168183dfe0b8616f2c6be2a2f307.jpg)

(http://tapatalk.imageshack.com/v2/14/10/14/c95b8ef23125847159172e64335f8cbf.jpg)

(http://tapatalk.imageshack.com/v2/14/10/14/c3a1161fb8ae375c19bccbded43edd94.jpg)

More to follow tomorrow...
Title: Re: CB750 K0 Diecast Carb Restoration
Post by: Trigger on October 14, 2014, 04:42:23 PM: James, No heavy handed on those slow jets ;)
Title: Re: CB750 K0 Diecast Carb Restoration
Post by: JamesH on October 14, 2014, 05:28:08 PM: Yep been there done that :-). Will be putting new jets (slow and main) back into these. For some reason it had 140 main jets installed...???
Title: Re: CB750 K0 Diecast Carb Restoration
Post by: AshimotoK0 on October 14, 2014, 06:17:30 PM: My alloy plate was broken too but had it welded together OK. Otherwise Yamiya sell them I believe.

Cheers ... Ash
Title: Re: CB750 K0 Diecast Carb Restoration
Post by: Bitsa (Ralph Wright - RIP) on October 14, 2014, 07:05:21 PM: Yeah
As I said by email to James mega pissed off by the post muppets.I do not like sending broken stuff gets me mad enough to slap someone but who?
Cheers
Bitsa
Title: Re: CB750 K0 Diecast Carb Restoration
Post by: UK Pete on October 14, 2014, 07:16:59 PM: Great find on them carbs , well done Bitsa, you lucky bugger James
That bracket was probably fractured anyway, they are wafer thin and very badly designed, the ones that guy makes are solid, but it depends on how original you want them, there is an original on ebay Germany at the moment James if you are looking for one
I actually used those low heat ally welding rods and a roofing torch and welded my broken one up, it seems strong enough but wont win any prizes for neatness
Will you be replating the linkages and bits James?
pete
Title: Re: CB750 K0 Diecast Carb Restoration
Post by: JamesH on October 14, 2014, 07:28:55 PM: Quote from: Bitsa on October 14, 2014, 07:05:21 PM
Yeah
As I said by email to James mega pissed off by the post muppets.I do not like sending broken stuff gets me mad enough to slap someone but who?
Cheers
Bitsa
I'll send you a blow up doll ralph - a 'slapper' for those long winter French nights ha ha...
Title: Re: CB750 K0 Diecast Carb Restoration
Post by: Bitsa (Ralph Wright - RIP) on October 14, 2014, 07:32:15 PM: James
Great just make sure its got scotch bottles in both hands ;D ;D
Cheers
Bitsa
Title: Re: CB750 K0 Diecast Carb Restoration
Post by: JamesH on October 14, 2014, 07:35:32 PM: Quote from: Bitsa on October 14, 2014, 07:32:15 PM
James
Great just make sure its got scotch bottles in both hands ;D ;D
Cheers
Bitsa
Title: Re: CB750 K0 Diecast Carb Restoration
Post by: hairygit on October 14, 2014, 07:35:33 PM: Bitsa, feel free to slap anybody who happens to be French, bound to be their fault!>:D>:D

Sent from my GT-S5839i using Tapatalk 2
Title: Re: CB750 K0 Diecast Carb Restoration
Post by: Bitsa (Ralph Wright - RIP) on October 14, 2014, 07:39:26 PM: Hairygit
Totally agree mate.Trouble is when one of them squares up to me they run a mile or in there case a kilometre
Cheers
Bitsa
Title: Re: CB750 K0 Diecast Carb Restoration
Post by: JamesH on October 15, 2014, 10:35:14 PM: Quote from: UK Pete on October 14, 2014, 07:16:59 PM
Great find on them carbs , well done Bitsa, you lucky bugger James
That bracket was probably fractured anyway, they are wafer thin and very badly designed, the ones that guy makes are solid, but it depends on how original you want them, there is an original on ebay Germany at the moment James if you are looking for one
I actually used those low heat ally welding rods and a roofing torch and welded my broken one up, it seems strong enough but wont win any prizes for neatness
Will you be replating the linkages and bits James?
pete
Plan is to gently clean this set rather than replate, refurbish and lose the original finish.

So all clean now and out of the ultrasonic tank....

(http://tapatalk.imageshack.com/v2/14/10/15/e66dcd657c2863e0d04c43e1b9c96fd2.jpg)

(http://tapatalk.imageshack.com/v2/14/10/15/c835cd9ae5bc1429bf6c5a65bd6b832a.jpg)

(http://tapatalk.imageshack.com/v2/14/10/15/584daaa1ea336d0b09663aff1e0f7a3b.jpg)

(http://tapatalk.imageshack.com/v2/14/10/15/f585dd46ee9511e6006aa5269b0e2054.jpg)

(http://tapatalk.imageshack.com/v2/14/10/15/fc71042bc36f92224cadb856dfd9a87b.jpg)

(http://tapatalk.imageshack.com/v2/14/10/15/67d0146d47842dc869192b3bf6cfd311.jpg)

Lightly assembled for storage...

(http://tapatalk.imageshack.com/v2/14/10/15/5400bd4edac28683fab7c0c560c76792.jpg)

(http://tapatalk.imageshack.com/v2/14/10/15/f7e27e2f3ed75139b86b5737891d32c9.jpg)

(http://tapatalk.imageshack.com/v2/14/10/15/c716666eae7944de88e2a94eae58c6ef.jpg)
Title: Re: CB750 K0 Diecast Carb Restoration
Post by: Trigger on October 15, 2014, 10:43:42 PM: James, Just because you have shown me yours, i am not going to show you mine ;)
Title: Re: CB750 K0 Diecast Carb Restoration
Post by: JamesH on October 15, 2014, 10:55:56 PM: Lost me there Graham...:-). Just sharing the love...
Title: Re: CB750 K0 Diecast Carb Restoration
Post by: Trigger on October 15, 2014, 11:05:42 PM: I always leave the body's as they are after the ultrasonic, polish the bowls and tops.
Love these carb's, so easy to work on.
Title: Re: CB750 K0 Diecast Carb Restoration
Post by: AshimotoK0 on October 16, 2014, 07:09:27 AM: Nice original finish to the alloy bodies James.
Title: Re: CB750 K0 Diecast Carb Restoration
Post by: UK Pete on October 16, 2014, 09:12:50 AM: Nice work james
Pete