JT. Steel Standard 521 - 630 Gearbox output pinionRef : JTC01132A / 1077417001

The JT Sprockets JTF521.15 sprocket is a steel front sprocket designed for torque boosting and gearing modifications on roadsters. Designed for final drive, it allows for a clean replacement of the original component or for changing the ratio to adapt the engine response to your urban or touring riding style.

• Manufacturer reference: JTF521.15
• Brand: JT SPROCKETS
• Material: steel (high-strength alloy SMC420)
• Number of teeth: 15 teeth
• Chain pitch: 630
• Type: 521 – standard version
• CNC machining for precise tooth profile and optimal fit

This standard JT sprocket is suitable for setups where reference 521 and pitch 630 are required. Its machined teeth minimize catching points and facilitate engagement with the chain for smoother transmission. Ideal for owners of Kawasaki Z 1000 (models KZT00H, KZ1000A - years 1979/1980) and other compatible roadsters, it installs as a direct replacement for the original sprocket.

Make sure to check compatibility with your model and the installation direction before installation. For reliable transmission, also check the condition of the chain and the rear sprocket during replacement.