I just got my banshee but my dad had one ,and my cousin has one .my dads never had any thing go wrong that wasnt his fault (like riding it off a 20' switch back )and his had just day to day maintnence done to it. all the upgrades it had where fmf golds,a k&n air filter and jets to set it right. my cousins on the other hand was set up just for drag racing and he will ride it then put it back in the garage till next time with out checking to see if any thing was wrong.i dont think his quad lasted more than 10 hours before he had to rebuild his motor.in the last 5 years he has had it rebuilt around 8 times. what ive learned is the closer to stock u keep it the less of a problem it would be. have fun :beer: