With a rigid motor sprocket. This BDL chain drive kit comes complete with everything you need and comes with a classic rigid motor sprocket without a damper as used on 55-69 Big Twin models. Kit consist of a primary chain, primary chain adjuster, the motor sprocket, and a complete rear clutch shell/sprocket assembly. The clutch shell includes a starter ring gear for electric start options and contains the BDL competitor clutch for positive shifts and no clutch drag. This chain drive kit will fit inside the stock primary housing.