hey guys i posted this in the polaris forum but nobody answered as expected. my friend wants to jet his trailblazer and were going to take off the airbox lid. the stock main is 110 mikuni and 40 pilot... im guessing it would be best to change the pilot when taking off the airbox lid but i could be wrong. so i was just wondering what the right jet sizes would be. i was thinking 130 main and maybe 42 pilot but im prolly way off.

 

I just took my whole airbox off on my modded 250, just went to a 290 from 270 so a 130 sounds fine on a stock 250