The 4 wheeler had a truck fuel filter on it that we bypassed as it prolly doesn't have any suckion and would prolly cause it a lack of fuel? But we took that off and it is still backfiring? Will take a look at flywheel key. What are signs of it being sheered?
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1986 TRX 250r -- .040 bore-- FMF FATTY GOLD SERIERS--FMF POWER CORE SILENCER--RACE CUT FENDERS--  |