I just sold my sons Raptor 90, he raced it for 4 years in MX. He did real well with it. We put on a full Big Gun Exhaust, took a lot of the extra crap off to save weight, a kehin carb, and reworked the clutch. It worked ok, but never went into the motor. We just recently moved up to a 125, but prior to that I was going to do some heavy mods to it and this guy was very helpful! Here I a link to his site. The Raptor 90 is a Eton. Good luck!