Originally Posted by Kevlarr
We just need somebody to come up with a small 3 speed (with neutral) actual transmission that basically bolts onto the back of the engine and runs directly off the drive sprocket.
If you can get by without the neutral, the shimano tricycle transmission rules. Neutral is not needed. either manual or auto clutches work with the trike shifter. The trike shifter can run all day and is only warm to the touch.