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440 big bore jetting

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  1. New Member Introductions
    I just got a Niche 440 Big Bore Kit for my 2001 TRX 400EX. I'm having some trouble getting it to idle correctly after jetting. I'll start with modifications made and then go into what I've already done for jetting. Modifications: 440 Big Bore Kit by Niche (the only new part, everything else has...
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