I actually haven't done anything yet, my daughter has been busy and hasn't had time to ride it. She did ride it last night but is tired of getting smoked by her sister on the Polaris 90 so I'm gonna have to do something. I called the dealer today and checked the screw tonight. I was able to loosen the screw so the throttle could move more but that didn't help at all. It still seems restricted somewhere else, possibly where you all mentioned. I put the screw back to where it was though, just on the chance it could over rev.