i have a slight hesitation on take off then it opens right up and runs like a champ... then going from full throttle in 5th gear ill down shift fast and hard for a corner and once in awhile it will backfire then run great again as soon as i put the hammer back down.. and ideas? as far as i know its only got a k&n filter nerf bars and an Dr. D aftermarket reverse switch. i bought the bike in nov 2012 for 800 bucks and have done nothing to it but change the oil and fresh fuel and battery. if anyone can tell me what it could be id appreciate it! btw this is my first quad so definatley a newbie!