[bamm]

i just bought a 2003 crf 450 r from my step dad he removed the spark arrestor the day before i bought it now it sputters upon releasing the throttle. any help?

[450xdirt]

any other mods that you know of that the bike has?

AIR BOX CUT?
JETTING?

[bamm]

yeah i actually found the problem to be an exhaust leak where the pipe joins with the header. got it fixed.thx