should or shouldnt

[LeGaCyGiAnT124]

ok well when i have my birthday in may im inviting alot of people which equals $. i was wondering what i should buy for my 400ex. would a pipe make it run funny? im thinking about a k&n airfilter and normal stuff like that. what stuff do you guys think i really need. im probably going to get somewhere around 400 bucks.

[HiperEX]

pipe and filter would be a good choice the only way it would run funny would be without rejetting your carb and will enventually burn down your engine if you dont rejet

[LeGaCyGiAnT124]

like is it super hard to rejet???? or should i get someone to do it for me. my cuzin said it would mess up with the jetting if its not right but idk. thats probably what i will end up getting :)

[LazeR]

pipe filter and rejet, you will notice a big difference. Its really easy to rejet!