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So i juste bought a 98 Polaris xc 600 that the carb are freshsly clean and have New plugs. When i crank IT does a Little Back fire and then start and run perfect. After its warmup its bug and sometime Do a backfire. After cooling down run great for one pull and start doing the same thing. Do you guys have some tips!
 

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if its backfiring from exhaust , normally caused by un burned fuel in the pipe, , if its carbed leaky needle seats efi , leaky injector ,bog could be too much fuel
 
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