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  1. Engine/EFI/Drivetrain
    I'm trying to mess with my procom and get rid of this mid-rpm stutter. From 5-7k rpm it bogs, stutters and pops and idk what to do to tune it out. Little history... Last year around October i sent my quad to a guy to work on it- port & polish, stage 2 hot cams, JE 12.8 piston. Soon as he has...
  2. Engine/EFI/Drivetrain
    For some time now I've been getting a violent popping from my chain/sprocket. It only happens in heavy, rutted sand. Friends tell me that it is time for a new chain and/or sprocket. That's fine by me but I want to know what exactly is happening? My initial thought was something along the lines...
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