
B1 Standard Steel Sprocket - 420 (Manufacturer part number: JBM450S00B): a sprocket designed for the restoration of transmissions on lightweight motorcycles. Made of steel, it features a classic geometry and a finish suitable for standard mounting on swingarms. Ideal for urban users looking for a reliable and easy-to-install replacement part.
This sprocket is suitable for transmissions equipped with a 420 pitch chain and replaces the worn part during regular maintenance. Its standard design makes replacement easy during a chain-sprocket-sprocket revision. Be sure to check the alignment and condition of the sprocket and chain at the time of installation to ensure smooth and quiet operation.
Common compatibilities: