SOHC.co.uk Forums > CB500/550
Advice on re seating a float valve and needle
simonster:
I would prefer to re seat or lap what looks to be an original 1.8 float valve and needle opposed to replacement. It may seat perfectly well, I'm not sure as the bike hasn't even seen fuel before today (whilst in my ownership). So while the carb is split it could be a wasted opportunity esp if it drains fuel once hooked up. Has anyone got any thoughts or words of wisdom?
Sent from my iPhone using Tapatalk
mickwinf:
I did polish mine with solvol autosol and they don't leak.
simonster:
I've polished the seat and needle on carbs one and two with a cotton bud and autosol and now testing it on the bench with clear fuel line to measure fuel loss, but at the moment the level is dropping about 10 mm in the pipe per 30 mins. Fuel is obviously breaching the needle contact but minutely. Is this expected on these carbs or should I expect a 100% seal?
Sent from my iPhone using Tapatalk
Bitsa (Ralph Wright - RIP):
If your test pipe is open to the air allow for evaporation
Cheers
Bitsa
simonster:
This is the set up, carbs 1 and 2 have had the seats polished and 3, 4 haven't. 1 and 2 are dropping fuel approx twice the amount per 30 mins to 3 and 4. Polishing had clearly reduced the loss but not fully sealed. I'm not sure of the evap rate but 10mm per 30 mins in a 6 mm inner diameter pipe seems excessive??
Sent from my iPhone using Tapatalk
Navigation
[0] Message Index
[#] Next page
Go to full version