Backfire on decel? Cant figure it out

I have a 150cc Chinese scooter. It ran great tell my exhaust broke. I drove it less than 25 miles without an exhaust. Winter has passed so now im trying to get it in good shape. Ive done valve adjustments, bought a new exhaust and made sure it had no leaks. Ive fucked with my air fuel mixture screw as much as possible as still having backfire on deceleration. Could i have blown a valve or something? Or any ideas?

It runs great has no other issues other than backfires on decel and flames shoot out. And how bad is it to run my moped like that?

Re: Backfire on decel? Cant figure it out

Why a new thread for some discussed just 3 days ago ?

Re: Backfire on decel? Cant figure it out

I think your valve adjustment isn't right. did you do that after it started backfiring? or before.

losing an exhaust shouldn't really care.

Re: Backfire on decel? Cant figure it out

Your idle jet is partially clogged. Clean the carb.

« Go to Topics — end of thread

Want to post in this forum? We'd love to have you join the discussion, but first:

Login or Create Account