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Discussion Starter · #1 ·
My YFZ is still stock. I take the airbox lid off to race and then put it back on. I read in one of these posts to go with 45Pilot, 165Main, and 4th clip on the needle. I made these changes and the lowend seems pretty good but not sure it is right with the main. Anyone else change jetting with just airbox lid off?
 
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