I have a 1999 bayou 300 4x4 that is constantly backfiring if you go above idle...I have rebuilt the carburetor, cleaned the fuel system and replaced the stator and pickup coil due to an electrical charging issue. Has anyone else had this problem with their bayou? Could it be the CDI box? The coil tested OK and I pulled the carb and checked all the settings again to make sure as well as checking the timing.