
B1 Standard Steel Sprocket - 420 (Manufacturer part number: JBFR10S00B) designed for 420 transmissions. Made for urban motorcycles requiring a reliable replacement part, this steel sprocket offers a simple and robust solution to restore your transmission.
The steel construction makes this sprocket suitable for the daily demands of the road and city. It installs as a direct replacement on systems designed for the 420 pitch; be sure to pair it with the correct chain and corresponding pinion to maintain alignment and even wear. A simple and functional product, it is suitable for routine maintenance or restoration of the transmission.
Main compatibilities (examples): APRILIA RS 50 (2003, 2004, 2005) - 50 cc. Before installation, check the exact compatibility with your model and the required number of teeth.