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For Mini bike 20 Series Drive Clutches, check out the stocks at OMB Warehouse. We source our inventory from the manufacturers for assured quality guarantee. Mini bike 20 Series Drive Clutches from Comet use ¾” top width belts. The belt mass lends substantially to the driving ability of the system especially in cases where added torque ability is required without danger of slipping the belt. The belt mass of ¾” top width is especially helpful in applications of low speed, added power requirements such as off road dune buggies, mini bikes, ATV’s and go-karts. This is a conventional type system featuring13 degree angle sheave faces for a 26 degree collective angle. Driven units available with either 6” or 7” diameter sheaves. Mini bike 20 Series Drive Clutches are mounted with torque sensing cam device inboard. Movable sheaves (driver and driven) operate opposite each other. The moveable sheave of the clutch is forced in as the RPM of the engine is increased. This contacts the drive belt. The drive belt will then be forced to a larger diameter within the clutch sheaves, thus pulling it to a smaller diameter within the driven unit sheaves. As this happens, the speed from the engine transferred to the final drive is increased and a mini bike gets off the mark.