when does it backfire?? and technically a backfire comes out the carb.... is that the case or do you have popping and explosions in the exhaust..... does it do it under acceleration, at cruise, or on decell......

if it popping in the exhaust and it does it on the throttle, it's probably jetted too lean.... if it pops at cruise, probably a vacuum leak and if it pops on decell, probably an exhaust leak at the head.

Ww

I switched the cdi box...and it is more of a popping noise and the bike will barely start or run ....any more advice?