Complete Buller Drive Jackshaft Assembly, belt style. Includes 20mm 57 tooth primary pulley, 20mm belt and all mounting hardware. To fit 1 1/8" frame rails. 20mm size is used with all stock 2 cycle engine applications. The jackshaft assembly replaces your existing motor mount and requires an adaptor plate to attach your engine to the jackshaft base plate. (Adaptor plate is not included.)
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