airbox cover

[realbeef]

Hey all im new to this forum, just thought id say hi. anyway I was wondering if running without the airbox cover is a bad idea, and second if I keep the cover and just drill a bunch of 1/16 size holes around the cover would that increase the intake? would the power be notacable and would that be a bad idea also if I drilled the holes, or should I just leave it as is and get a different air filter. I believe I have a white bros air filter. thanks

[Rip_Tear]

it might help your throttle responce, it won't be any huge difference in power, it will let more air in of course, it may even require a carb adjustment to allow more gas in, depending on how close your jetting was before.

[CarGuy7a]

i have an EHS racing airbox lid on mine. and i noticed quite a bit in throttle response. of course i had to go to a bigger pilot jet #40 for cold starting.

we went riding this weekend and we ran through mud and water splashes and the lid didn't have a speck of dirt on it. it had a little dust inside the box but nothing major.

[realbeef]

well the thing is I already have a white bros jet kit so my throttle response is spot on. but if I remove the cover would there be and performance boost or would it just be a smoother running machine. Im kind of weary about modifiying my airbox but im sure it would be fine if I took it off. Just thought id let you know that I ride in sandy and grimy enviroments.

[CarGuy7a]

what i did is i kept my stock lid and just ordered the complete set up from ehs racing $80. that way if the conditions got really soupy i can pop the stock lid back on. really the only thing on jetting i had to do was change the pilot. of course my main jet was just a bit rich so it was just right with the open lid.

yeah you'll notice a bit in performance. it'll pull harder from the bottom all the way to the top.

i used to be able to climb long hills in only second gear and now i'm hitting 3rd about 2/3's the way up.

check em out www.ehsracing.com

[realbeef]

ok thanks for the help. I will probably be placing an order very soon then, thanks everybody.

[drag101]

what is the stock pilot size on the 400ex

[AZSCTACO]

Originally posted by drag101
what is the stock pilot size on the 400ex

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