Alvin, You're right the detent is what makes passing gear work. It's been 25yrs. since I worked on these, but I think the linkage on the carb activated the cable before full throttle. I may be wrong and don't want to argue, was just throwing it out as a possiblity. As for the shift kit, yes they do snap gears hard, however if you put the check balls in the wrong place, it will affect when the shifts happen if they happen at all.
Roy, the govenor has a plastic gear on it's end. When the gear wears the trans won't shift out of 1st gear till 40/50mph, but as soon as you let off the gas,bangs back into 1st gear. I guess it could be stuck,but I would think it wouldn't shift 2nd to 3rd if it was.
Hope I didn't ruffle any feathers, just expressing some thoughts.
