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    Suzui DT140 EFI Runs great up to 4000/4100 RPM then but won't maintain full throttle

    I have a Suzuki DT140 with the Throttle Body EFI (not carbureted) It will run great up to the 4000/4100 RPMs, but if I try to open it up it will run at about 5000 RPMs for a minute then it starts running rough and won't maintain steady RPMs. I can back off the throttle and it will continue to...
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