Fit For XJR1300 FJ1200; standard 530 pitch front sprocket for motorcycle chain drive system matching engine output shaft size machined inner splines tooth profile; slides onto drive shaft smoothly meshes tightly with 530 chain without uniform tooth structure disperses chain pulling force evenly; reduces chain slip abrasion during torque acceleration solid material; tooth polishing craft; smooth tooth surface to minimize chain friction loss OEM matched outer diameter spline quantity; consistent tooth thickness for stable fit with all standard 530 drive chains