i've heard that removing the airbox lid helps a lot, i guess the engine could use a lot more air, and i know i'd have to rejet, but my question is, if i ride in mud every once in a while, so would that hurt anything?
Only if you get dirt in the box...You could get just put like an outwears over the top of the lid...Ive seen pictures of 400exs where guys to that...or take some 1" plugs that you can buy to put in the top of the lid...put like 18 in the top...LOL...
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