Trust me all my wheeler has is pipes and filter, it is the second fastest wheeler in town, 1st is a more modded banshee, but i dont want it to blow up, my bros a good mechanic and he said don't touch that damn motor cuz as soon as you do that they loose reliability. The other banshee in town has blown up 3 times and its 8 years newer than mine, mines never been touched as far as the motor goes and its stayin that way unless i move somewhere where i can actually ride with some competition, some of the wheelers i ride with are 4x4s, 200x 3 wheelers, 185s 3 wheelers, tecate 250, honda 250x's, and the most competition is a 450r and I beat that when my wheeler was bone stock, they are not that impressive, i would never buy one, banshees kick ass!!