JT. Steel Standard Rear Sprocket 1857 - 520 SprocketRef : JTC01243A / 1074963003

Manufacturer Ref: JTR1857.39 — JT SPROCKETS standard steel sprocket 1857 - 520, designed for chain transmissions of quads and roadsters. This steel sprocket (carbon C49) is intended for replacement or modification of gearing on 520 transmissions. It fits into maintenance and preparation operations to restore a reliable rolling chassis.

• Material: carbon steel C49
• Number of teeth: 39
• Chain pitch: 520
• Type: standard (sprocket type 1857)

Engineered to withstand torque demands and common usage conditions, this JT Sprockets sprocket is aimed at riders looking for a robust replacement part for their pinion and chain. It allows for gearing adjustments as needed — more acceleration or better stability at speed — without complicated modifications to the final drive.

Typical applications: quad and roadster. Examples of models often equipped with this reference: YAMAHA YFZ 450 R (2020), YAMAHA YFZ 450 R SPECIAL EDITION (2020), and YAMAHA YFM 700 RAPTOR SPECIAL EDITION (2018). Please check compatibility with your vehicle before ordering.