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Old 15-04-2009, 08:00 PM   #1
0187johnny1
 
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Join Date: Jan 2009
Age: 37
Posts: 10
Bike: xsprt and trump
Pit bike backfiring!!

HI EVERYONE I HAVE GOT A THUMPSTAR PITBIKE WHICH HAS 2 PROBLEMS 1ST IS NOT RUNNING 100% AND THE SECOND WEN I REV THE BIKE IT KEEPS BACKFIRING !! I THINK IT IS SOMTHING TO DO WITH FUEL MIXTURE COZ I CLEAN THE SPARK PLUG PUT IT BACK IN THE BIKE STARTS IT UP THEN TAKE PLUG BACK OUT AND ITS BLACK AND SOOTY!! HOPE SOMONE CAN HELP?
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