Wondering if anyone has played with qiye 125cc auto with reverse. And changed it out to a 4 speed semi auto with reverse useing the same motor just swapping gears out. Would love some input on the subject or idea. Trying to bring the Rpms down a little see that helps with vibration from higher rpm or any engine mods too for the vibration.
Plus any ideas for making motor mounts with rubber or urathan or any other ideas thanks

 

It is almost impossible to find details about the auto version's gearbox, but I doubt if the cases are the same as the manual one. It is probably as cheap, and a lot easier, to buy a complete manual gearbox engine. If you want to fetch the revs down, alter the sprocket sizes on the engine and/or rear axle. I guess the "pit bike" racers will have some mods for balancing the engine.