



JT Sprockets JTF1120.13 Sprocket — standard steel 1120 sprocket for 420 chain, designed for urban motorcycles and roadsters. Ideal for original replacement or for modifying the gearing, this 13-tooth sprocket offers a robust and straightforward solution for the primary transmission of your machine. Its design focuses on everyday reliability, whether in the city or on small roads.
JT Sprockets are precisely machined to ensure a good fit with compatible chains and sprockets. The 13-tooth design allows you to adjust the gearing according to your use: more urban cruising or optimization for responsive acceleration on a roadster. Before installation, check the pitch, number of teeth, and compatibility with your output support for a secure fit.
Frequently compatible motorcycles (examples): RIEJU MRT 50 SM (2025), FANTIC XM 50 PERFORMANCE (2025), BETA RR 50 MOTARD (2025). Always confirm compatibility with your nameplate or manufacturer’s specifications.