Basic instructions for replacing the boss drive: 1-Remove bolts(8mm) from clutch cover 2-Remove 17mm nut from front pulley 3-Remove outer half of drive pulley(drive pulley face) 4-Remove drive belt from shaft 5-With left your hand, hold inner half of pulley(movable drive face),and with your right hand remove the boss face drive(variator spacer). Be sure that you hold the inner pulley half securely to insure that the roller weights remain in their proper position (they could fall out) 6-Insert new spacer 7-Install belt 8-Install Pulley half and 17mm nut 9-Install cover