no need dyno, u have to twist the button left right from low to high, while twisting u press the throttle so that u can set which rpm u want to change gear, the other button is for adjusting the shift lamp brightness
sorry eelong..did not notice all the pms i got..very sorry, i just went straight away to the forum..hehe, anyways thanks for all the replys..the item is already been sold for rm110..thanks