JT. Steel Standard 1907 - 428 Gearbox output pinionRef : JTC00332A / 1077303001

JT Sprockets Standard Steel Sprocket 1907 - 428 (13 Teeth) — manufacturer reference JTF1907.13. Designed for motocross use, this steel sprocket offers a reliable solution for replacing or adjusting your gearing. Its design meets the demands of muddy terrains and repeated jumps: a simple, robust transmission element tailored to the needs of riders.

• Material: steel (high-strength SMC420)
• Number of teeth: 13 (sprocket)
• Chain pitch: 428
• CNC machining for precise notching and good fit with the chain
• Version: standard (type 1907), lightweight design optimized to reduce unsprung mass

Replacing the sprocket allows for adjustments in acceleration and motorcycle behavior based on the track: more torque at low RPM or a higher top speed depending on the gearing choice. The JT sprocket, known for its fine finish, installs easily and integrates with 428 chain kits.

Suitable for 85cc motocross models, for example:

• KTM 85 SX STD WHEELS 17/14 (2020)
• HUSQVARNA TC 85 STD WHEELS 17/14 (2017)
• KTM 85 SX BIG WHEELS 19/16 (2020)

Reference: JTF1907.13 — sprocket 1907 13 teeth, pitch 428.