JT. Steel Noise-Free 1591 - 525 Output sprocketRef : JTC01147A / 1126793001

JT Sprockets JTF1591.15RB — 15-tooth steel sprocket designed for the transmission of roadsters equipped with a 525 chain. This JT SPROCKETS sprocket combines a high-strength SMC420 steel alloy and CNC machining for a precise and consistent chain part. The profile incorporates a noise-reducing treatment to minimize transmission noise and provide a smoother ride without compromising durability.

• Manufacturer part number: JTF1591.15RB
• Type: sprocket 159 – 15 teeth
• Chain pitch: 525
• Material: steel (SMC420 alloy), steel finish
• CNC machining for precise geometry and reliable chain engagement
• Noise-reducing profile to limit transmission resonance

Ideal for replacement or gearing modification operations, this sprocket is aimed at riders who want a solid and well-finished drive component. Compatible with the roadster universe, it fits many modern models while maintaining a lightweight design optimized to reduce unsprung mass.

Compatibility examples (to be verified according to installation and year):

• YAMAHA R9 (2025 - 900 cc)
• YAMAHA MT-09 Y-AMT (2025 - 850 cc)
• YAMAHA MT-09 SP (2025 - 850 cc)