Motorcycle Pinion Gear CB600F CBF600 CBR600F F4i Fit For CB1000S Hornet SP CB600F CBF600N CBF600S CBR600F CBR600FS CBR600RA CBR60F4 F4i CBR600RR; standard 525 pitch front sprocket engine output shaft specs for Honda sport street motorcycles machined inner splines full tooth profile; mounts smoothly to drive shaft meshes with 525 chain with no grinding or needed even tooth layout evenly spreads chain tension; minimizes chain skip surface abrasion during torque acceleration highway riding solid base with tooth polishing; smooth tooth faces cut friction loss prolong drive chain life OEM matching outer diameter spline count; uniform tooth thickness creates secure stable fit for all standard 525 motorcycle drive chains