Hello! I have an 86 250r with an ESR 310 kit. When I’m on the throttle in the lower gears like 1st-3rd the bike seems to pull fine but in the higher gears when on the throttle it seems the motor free winds and doesn’t hardly pull. I have the clutch adjusted all the way so that there are no threads left to adjust. Don’t know what to replace or look for. Thanks for the help!