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Posted

if you were running the lid before and then put the filter on then yes you would need too. you still might need too

anyways. i took my lid off and ported my stock reed cages and had too go from a 210 too a 250 main and im going too trya 260 and see what it does. good luck man

Posted (edited)

im at sea level and when i switched to the k&n filter with no lid (and added pro circuit pipes) i used 290 mains. If you dont run the lid and you have stock jets it wont run right at all.

Edited by yfz350rider

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