lotfancy go kart clutch 3/4 bore 10t with #40 41 420 chain, centrifugal clutch fit for go kart minibike mb165 & mb200, up to 6.5hp, 1pc connecting link included lotfancy assembly used on all versions of the baja mini bike, including the baja heat, mini baja, and the baja warrior.it is compatible with both the mb165 and the newer mb200 models.this item is also a perfect replacement part on many small utility 163cc 5.5 hp and 196cc 6.5 hp engines.