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04 crf450 running issues

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I have a 2004 crf450 flat tracker and it will periodically when hard on the throttle start running like it's against the rev limiter, now when it does this it runs like this at any rpm, sounds like it only goes half throttle but against rev limiter, however once I shut it down and restart right away it will run fine until it feels like doing it again. I've changed coil, plug, stator, wiring harness, cdi. Tps reads perfect on meter. Once again it doesn't do this all the time, most of the time it does it during a main race lol. Any help would be appreciated.

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Sounds like the electrical has been gone through, so maybe it's a fuel delivery and/or carburetion issue. Plugged gas cap venting system perhaps? Plugged up jets or flow circuits?

Edited by Eddie8v

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