JT. Steel Standard 1579 - 520 Gearbox output pinionRef : JTC00321A / 1077285003

For replacing a sprocket or changing the gearing, the JT SPROCKETS standard steel sprocket 1579 - 520 provides a solid and easy-to-install solution. Designed for roadster motorcycles, this compact sprocket fits on transmissions equipped with a 520 pitch chain and offers precise engagement with its 17 teeth.

• Brand: JT SPROCKETS
• Manufacturer reference: JTF1579.17
• Material: steel (high-strength alloy)
• Number of teeth: 17 — pitch: 520
• Type / version: 1579, standard version

CNC machined, this sprocket features precise finishing that limits premature wear and ensures consistent contact with the chain. Made from high-strength SMC420 steel, it prioritizes robustness against torque stresses while offering an optimized design for a good mass/strength compromise. Ideal for achieving responsive transmission on the road, it will particularly suit the models listed below but can also adapt to other machines equipped with the 520 pitch.

• Examples of compatibility: YAMAHA R9 (2025 - 900 cc), YAMAHA YZF-R1 M (2024 - 1000 cc), YZF-R1 (2024 - 1000 cc)

Before installation, check the spacing and compatibility with your rear sprocket and chain. For optimal longevity, adhere to the manufacturer's torque specifications and regularly check the condition of the chain.