It will fit 1936-2006 Big Twins, 1999-2006 Twin Cam, except 06 Dyna. 1936-2006 Big Twins. Main Shaft Sprocket Wrench Tool is for 1 7/8"nut. 1999-2006 Twin Cam. Be sure to change the Large Output shaft, behind the pulley and shifter and main gear seal, otherwise when it goes later on you will have to redo whole job again!
