The EVB drive is one of BDL’s original closed primary belt drives. 52 tooth front pulley. 69 tooth rear pulley. 1-1/2″ wide 142-tooth belt. Starter ring gear. Designed for bolt in application. Clutch basket features 12 cylindrical replaceable clutch dogs, which allows clutch plates to maintain constant contact. Clutch plates give the maximum performance combined with ball bearing pressure plate. Includes BDL’s patented Ball Bearing Lock Up Clutch. Includes a sealed bearing for the inner primary.