I have a busa in a dirt bike hillclimber. It will redline at 1/4throttle or less. If you give it over 1/4 it will stumble and drop to 7200 rpm. I have cheked tps and fuel psi both are good. It has stock electronics and fuel stystem. I have never had it running good just built, may have a underlying problem. any help would be appreciated have race three weeks.
wont tach
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