Major backfireing

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no they all do it they get over it in a while every thumpstar does it
 
No its not normal, it usually means something is loose or a gasket has blown out. Check your headder bolts, the two bolts that attatch your exhaust to the head of the motor, minor adjustment with these can fix your problem. If they are tight enough and it is still popping / cracking noise, the headder gasket may be flogged out. Only a $2-$3 part.
 
can also be caused by mixtures, but check those 2 things I mentioned above first. Alot easier than having to retune your bike!
 
Yep check the bolts where the exaughst bolts on underneath. Mine came loose, I lost one bolt and the other one was way loose.
 

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