BDL's chain drive comes complete with their Competitor Clutch for absolute transfer of power to the rear wheel. The 7-plate Aramid fibers clutch provides at least 60% more clutch surface than stock. The 9-spring pressure plate provides varying spring pressure needed for stock to seriously tuned Big Bore and strokers. Kit includes front compensating sprocket, complete rear basket with Competitor Clutch, Diamond primary chain, primary chain adjuster, installed 66 tooth starter ring gear as found on 1990-1993 models and the matching 9 tooth starter motor pinion gear that also works in later models.