You would think Yamaha would would take this out of the blaster and banshee. Its just their way of making money. I had this happend to both quads. You can replace the top of the carb with a new piece or cut the wire from the carb and connect both wires together. Also check the throttle there is a little switch inside that could be stopped with dirt.

 

I have ran that screw all the way in and back out with no change in rpm. I took the flywheel off last night to look for any broken wires and such, found nothing. After talking with a friend last night I started wondering if it was starving for air, so I decided to take a look at the reeds to make sure they were not blocked or broken and found that the gasket was crap,so now I'm wondering if it was actually sucking too much air (no doubt it was leaking), I sealed it with some black rtv and have to let sit for 24hrs I'll try it after work today and let you guys know. Do you think this could be the problem?

 

i doubt that the gasket could cause all that.
I think the tors is messed up. when you screw in that screw it should move the needle up farther, causing it to rev.
did you check the filter as well? anything blocking it from getting ALOT of air?

 

Right now I have the entire airbox off, so I don't think there's an air restriction. I jumpered both TORs switches and I've unplugged the TORS completely at times with no change.