
Replace the worn sprocket or simply change the gearing with this JT Sprockets sprocket reference JTR820.42. Designed for the final drive of machines equipped with a chain pitch of 520, it offers a reliable solution for motocross and roadster riders looking for a robust replacement part that meets standards.
The C49 steel composition ensures mechanical strength suitable for the demanding use of enduro and motocross, as well as the stresses of road use for roadsters. Its 42/820 tooth configuration allows for adjusting the gearing to modify engine behavior in terms of RPM and torque without resorting to complex solutions.
Compatible as a replacement for many models equipped with 520, notable machines include the GAS GAS EC 200 Racing (2020), the BETA RR 350 4T Enduro Racing (2019), and the SHERCO 250 SEF‑R Six Days (2018). Always check the exact compatibility with your model before installation.