[mmade22]

Take the carb off (two phiilps) keep the throttle cable hooked up. Disconnect and shut off the line. Now looking in the carb, Press the throttle and look at the slider inside. You will see it is opening half way. There are four screws that hold the throttle cable in. Unscrew those and the cable, pull up the cover and mark the slider on the bottom . Take it out slowely, take a dremil tool and lightley cut a circle (dont cut the cable) and clean it off good. Put it back in. Only slides in one way, replace the cover.

Now take the four screws off the thumb throttle. Press the throttle open and look at the slider in the carb. It still only opens half way. Cut the inside of the side of the lever on the set-screw side, so the thumb opens up all the way. Look at the slider to make sure it opens all the way, install it, and test it out.