Motorcycle Pinion Gear 15T 16T CB650F CBR650R CBR650RS Fit For CBR650F CBR650FA CB650F CB650FA 14-18 CB650RA 2019-2024 CBR650R 19-24 CBR650RS; dual option 15T 16T 525 pitch front sprocket fits engine output shaft of Honda 650 series sport motorcycles machined inner splines complete tooth profile; slides onto drive shaft smoothly meshes tightly with 525 chain without or grinding evenly distributed tooth layout balances chain pulling tension; effectively reduces chain jump surface abrasion under daily commuting speed acceleration solid blank material; fine tooth surface polishing craft; smooth tooth surface to lower chain friction loss extend life OEM matched outer diameter spline quantity; consistent tooth thickness delivers stable fit with all standard 525 size drive chains