1999 Yammy 350 4X4 high speed problems

[ChristianWarrior4]

My Quad, starts fine, takes off fine, but when I get 3/4 to full throttle it spits and sputters. The carb has been rebuilt, stage 1 carb kit with filter, and RCM steel exhaust. I have a manual for this model, and I'm fixing to go down the long list of ELEC. tests. ANY SUGGESTIONS???????

[hangingon]

Is it spitting & sputtering out the exhuast or the carb. Do you here it popping back thru the carb? Have you checked the spark plug.

[ChristianWarrior4]

Spark plug is good, I believe it was both carb and exhaust, it almost sounds like a rev limiter. My rpm gauge reads roughly 3000 rpm's when it starts, acting up.

[hangingon]

I'm not sure on the Yamahas but my Kawasaki has a cvt belt and it can go into limp mode. I have not had this to happen but I have read up on it and the Kawasaki will run as if the reverse rev. limiter is on. But they can be reset. It may be worth checking into. I would also go back and recheck he carb.

[Ajmboy]

Sounds like a carb setting or incorrect jetting.