



Manufacturer's Ref: 600M 12 18NC
The PBR standard steel sprocket 600M - 420 is a drive component designed for urban riders and small displacement roadsters. Made from 18NCD5 steel alloy, this 12-tooth sprocket fits a 420 pitch transmission to provide a robust connection between the engine and rear wheel. Its standard design adheres to original dimensions for a simple and reliable replacement.
Ideal for regular maintenance or refurbishment after wear, this sprocket is suitable for daily urban use as well as quick outings on a roadster. Be sure to check the condition of the chain and the crown during replacement to preserve the lifespan of the chain/sprocket assembly. Particularly suitable for the 50 cc models listed by the manufacturer, including RIEJU MRT 50 SM (2025), FANTIC XM 50 PERFORMANCE (2025), and BETA RR 50 MOTARD (2025).