I just bought a ct racing exhaust system and had the dealership install it and jet the bike for me. I get it back and I had some trouble starting it but once I got it going it was revving very high, so I shut the choke off and it was still revving very high, after about 40 seconds the revs died down to a weak idol like it was threatening to die on me. But I gave it some throttle and tried it anyway. It works fine in higher revs but in the lower revs is bogs and if i give it a tiny little bit of throttle and hold it there the bike shuts off. I called the dealership and they said that it was running fine there so no help to me. They did mention something that they said Yamaha told them to do, it wads to cut a wire that connects to my carb. I think that it has something to do with my rev limiter. If anyone has any idea what is going on with my bike it would be allot of help. Thanks.