Hello, Please HELP my 2018 yz450f has a problem, when bike is wide open it falls on its face, almost like the rev limiter kicks in extra early or extra strong, has anyone ever had this problem, ive tried checking valves, cleaning throttle body, new map sensor, cleaned fuel injector, cleaned fuel pump, everything works, as it should up to wide open, wide open bike makes a flat sound.. whats next,, could it be it needs a top end.. bike has 73 hours.. Please HELP
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