air box questions

[300ex boy 22]

what are the benfits of removing air box lid and what are the bad parts. what is better for mx air box lid on or off

[EXevan91]

for mx it would be better to run with out the lid on if u want.

the advange of taking the air box lid off is to get more air into the engine.

disagvange is it would be easyer to get water into the engine