JT. Steel Standard 857 - 520 SprocketRef : JTC00265A / 1075522001

Replace the worn sprocket or modify the gearing with this JT Sprockets sprocket reference JTR857.39. Designed for the final drive of motorcycles and quads equipped with a 520 pitch chain, it embodies JT's expertise in a simple and robust form: steel sprocket, black finish, 39 teeth.

• Brand: JT SPROCKETS
• Reference: JTR857.39
• Material: steel (C49 grade)
• Color: black
• Number of teeth: 39
• Chain pitch: 520
• Type: standard (sprocket)

The C49 grade is commonly used for transmission components: it offers the appropriate strength for the demands of the sprocket and chain. The choice of 39 teeth directly affects the gearing and behavior of the drivetrain — useful for adjusting acceleration or top speed according to your needs.

Compatible universes: Quad, Cross, Roadster. Examples of compatible motorcycles (non-exhaustive list):

• YAMAHA TT 600 RE (DJ01) — 2004
• MZ 660 MASTIFF — 2000
• YAMAHA XT 600 E (DJ02) — 2002

Check the bolt pattern and the number of holes before installation to ensure compatibility with your model. This standard replacement part is ideal for maintenance or gearing modification.