I recently rebuilt the motor on my blaster. It runs pretty well, butt will not operate well at high rpms. I can only run the motor in high rpms while in neutral or riding down a steep hill. I noticed that there as a hole on the right (kickstart) side of the carp that is threaded on the inside. It looks like an adjustment screw is missing. Is there suppose to be anything there? I also have not deleted the tors yet, but am not sure if that would cause this problem. Any help would be appreciated. Thanks