Page 1 of 1

Fuel vapour blowing out the carb

PostPosted: Thu Feb 23, 2023 11:57 pm
by Trevor S
When I run my 1967 SX200 with the air hose off, there is fuel vapour blowing out the carb mouth when I
rev the engine. I have noticed fuel dripping out of the drain tube with the air hose in place.
The Dellorto carb has been cleaned fitted with all new gaskets, slide, and fuel cut off valve etc.
I have never had a Lambretta that did not leak fuel out the drain tube a little however I think this
is a bit much.
Anyone solved this?
Trevor S

Re: Fuel vapour blowing out the carb

PostPosted: Fri Feb 24, 2023 9:32 am
by hullygully
how old is the bore to piston to rings bud?
does the piston match any tuning work done on the barrel?
timing?
carb & jetting?

Re: Fuel vapour blowing out the carb

PostPosted: Fri Feb 24, 2023 12:54 pm
by hullygully
think you need to place this in the carb section bud ;)