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07 yz 450 jetting

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Hey guys I have an 07 yz 450 runs awesome just got it and dialing it in to where i want it. i put a mega bomb header and fmf pipe on it also i just ordered a heavier flywheel to tractor me through the technical stuff i ride mostly hills and woods. what jetting should i go with trying to stay on a budget but are the aftermarket kits worth it i found one where you drill the main has anyone done that also i ride between 800' and 2000' above sea level thanks for all your input.

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