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The Mini bike Comet 20 series torque converter clutch driver is one f the top selling products at OMB Warehouse. This item is a perfect fit as an OEM replacement part. Check out our Comet 20 Series Torque Converter Clutch Driver / Driven Unit 3/4" Bore w/Belt good as a 20 series torque converter system. The model is 20 series, Type symmetrical 26 in, Recommended max and min 8 HP 2 cycle or 4 cycle engines. The drive belt is the symmetrical type with ¾ in top width. The drive clutch boxes sizes are ¾ in and 1 in (3/16 to ¼ key. The drive clutch engagement range is between 1200 RPM to 3100 RPM. The driven unit 5/8 in or ¾ in diameter 6 in or 7 in bore with key 3/16 in. The model 20 uses a 3/4" top width belt. 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 the 3/4" top width is especially helpful in applications of low speed, added power requirements such as tractor mowers, off the road mini bikes and go-karts.