Renthal – Rear Sprockets - Honda Street - 520 Pitch, including hard anodized 520 rear sprockets in 42 and 43 tooth for the CBR 600F, CB 600F, CB 650F, CB 650R, CBR 1000RR and CBR 900RR, converting a Honda road bike to a lighter 520 drive set is one of the most effective handling and response upgrades available, and these rear sprockets are built for exactly that job. All are hard anodized for surface hardness and corrosion resistance, cut in 520 pitch at 42 and 43 tooth, with fitments spanning the 97-98 and 07-13 CB 600F and CBR 600F, the 14-23 CB 650F and CB 650R, the 96-99 CBR 900RR and the 2021 and 2024 CBR 1000RR. A lighter rear sprocket reduces unsprung and rotating mass at the wheel, which sharpens acceleration, makes the bike easier to turn and lets suspension work with less inertia fighting it. Choosing 43 tooth over 42 shortens final drive slightly for stronger roll-on and quicker corner exits, while the taller option keeps highway rpm lower. Precise tooth spacing keeps chain engagement smooth, which removes the snatchy part-throttle feel of a worn drivetrain and helps the chain and front sprocket last.