SOHC.co.uk Forums > CB750
Carburettor Repair and Set up in South Yorkshire
Bryanj:
Best of luck, those should be PD carbs and 're god awful to work on
K2-K6:
--- Quote from: DavidDeb on October 28, 2022, 07:50:33 PM ---Thanks for the reply
It’s a Supersport F2 and Carbs look original
Previous owner was a friend who had it 20 years and really never used it apart from the odd run
I am just looking for a local garage that I can trust to get them serviced and set up
Bike starts on the button and ticks over but slight fuel leak from the pipe at the bottom of one of the carbs
--- End quote ---
Given the familarity to work with most of these carbs and finding someone reliable that won't make worse any difficulty currently happening, then it may be worthwhile using a fuel addative initially to see if that helps.
Something like reddex or two stroke oil added at 10ml /litre (100:1 ratio) has been viewed as helpful from forum experience in assisting reliable float closing etc to bring more reliable running.
Something you may have picked up on forum is that the original brass jets etc are highly desirable to keep if in good order. Mentioned because someone offering to work on them may advocate all new components without the experience to back up that choice.
From the description, it sounds as if there's minor sticking of float valves to give the outflow you see. If that's the case, then the above action of addative, a little tap on floatbowls with screwdriver handle could help significantly to then allow further running to assess where you are longer term.
McCabe-Thiele (Ted):
I have found you do not need to tap the fuel bowls just shaking the bike from side to side works on my 400.
If the petrol is more than 6 months old I would add some Halfords Octane reviver it worked wonders on my car that had not had new petrol in almost 17 months.
Bryanj:
The yanks swear by Seafoam which you can get in uk from amazon and elswhere, it helped both in oil and fuel on my mats 1500 wing trike
DavidDeb:
Thanks for all the advice it was in fact a sticky float
Navigation
[0] Message Index
[*] Previous page
Go to full version