Back firing ? ? ? What is the cause?

[snrobin]

What causes a backfire and how can i fix it? I have a '96 300ex and it tends to backfire a lot when i let off the throttle. Thanks in advance for any answers.

[4TraxRider]

Sounds like you might be running a little lean.

YOUr main jet is too small..

[dariusld]

Or you have an exhaust leak.

[snrobin]

I tore my exhaust apart after work and it had a hole about the size of a quarter in it where the muffler hooks onto the header pipe so i broke out the welding torches and patched it up!!! :devil: :devil: :devil:

Thanks for all of your advice. I was hoping i wouldn't have to mess with the jetting...... No more backfireing from my good ol' 300ex :)

[markk]

u need to mess with the spark advance or try running a better quality gas

[RoadkillerRyan]

Originally posted by markk
u need to mess with the spark advance or try running a better quality gas
:rolleyes: :huh