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inspector

Help I can't get my 450 running right(backfires

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I bought a new o6 WR450 about 8 months ago. I put a new FMF pipe on , JD jet kit and a fuel mixture screw. The jet kit got rid of my low idle bog butt the bike is getting harder to start and it back fires alot. :thumbsup:

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I don't know what the pilot/fuel screw test is and yes my AIS is still hooked up. Butt will that make it start easyer with it removed?

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Thanks, disconnected the AIS and NO MORE backfire. Butt I still not sure whats up with my fuel mixture screw.

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