This 4-5/8" stroke 8-1/2" diameter flywheel assembly fits 1999-'06 HD® big twin engines (except Dyna models) and S&S® T124 engines. May be used to replace the flywheel assembly in an S&S® 124" Hot Set Up Kit®. Sprocket shaft does not have a stock style bearing race pressed on. This three piece design flywheel assembly is for crankcases with Timken® sprocket shaft bearing. Assembly is trued to less than .0005" runout on pinion and sprocket shaft bearing surfaces, making them capable of higher rpm and fully compatible with gear drive cams.
