Another backfire, popping question

Halfway through a ride last week my bike would backfire, and pop on deceleration. It is weird because it ran fine the first half of the day. I am thinking it is the fmf factory 4 silencer ( air might be leaking where the midpipe meets the header)but I have had the silencer on for about 3 months now and I think the sealant( silicone )might have burnt off where the pipe meets the silencer. I just cleaned the carb, adjusted the air screw and tightened the air boot where it meets the carb, other than that I dont know what else to look for. Could the valves need adjusted? :thumbsup: I forgot to mention it was about 85 degrees and humid so I dont know how it would have gotten lean??

check and make sure that all your exhaust connections are air tight, generally you are right; back firing on decelleration is caused from leaky exhaust, dont be alarmed. :thumbsup:

Did you try adjusting the fuel screw during the day? Did it help or did it still pop?

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now