in simply words, different gear set engages depending on the centrifugal force of the engine shaft, clutch and push type I believe is about how exactly the gear set engage and probably not very important.
apart from two speed, there are models with 3 speed or even more. once upon a time, there were EP touring also with 2 speed
in simply words, different gear set engages depending on the centrifugal force of the engine shaft, clutch and push type I believe is about how exactly th ...