Had the carbs rebuilt last year ran perfect first time out full throttle and everything now runs fine until you pass the 45 MPH point then it starts to surge and bog it will go full throttle then back down then back up then back down etc. Just replaced the grey fuel lines all but a few that i cant get to, and cleaned the fuel filter above the gas tank, but no difference still runs the same. Any Idea on what is wrong? and is there a fix that i can do on my own? this is really starting to PISS me OFF im thinking that the XP stands for xtra problems!!!
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