I have a problem with my 2000 Yamaha blaster. When i start it up its fine. But when i but the chocke on it revs high then it stalls. Is it suppost to do that because all my other dirtbikes and quads dont do that. Its just suppost to help it start right? :-/ Then it runs fine. I:I After a couple of hours riding it. When i turn it off i turn the carb switch from on to off and i leave it running until it dies out. Then suddenly It was revving the highest it could be. I took the key out it was still going. Then the red switch to off and its still going so I hit the throttle and it stalled. It scared the sh*t out of me. Any suggestions? Thanks