JT SPROCKETS Sprocket - Rear - Yamaha - 40-Tooth JTR853.40

A properly matched rear sprocket is fundamental to your bike's acceleration, top speed, and overall driveability—and cheap alternatives will cost you in wear rates and reliability. The JT Sprockets 40-tooth rear sprocket delivers the precision engineering and material quality that serious riders depend on, whether you're fine-tuning gearing for track conditions or building a dependable street machine. JT's computer-aided design process and rigorous heat-treatment process ensure you're getting a sprocket that meets or exceeds OEM standards without the OEM price.

• Fits: Yamaha (model-specific)
• Tooth count: 40T
• Material: C45 high-carbon steel
• Heat-treated for durability
• Bead-blasted finish
• Computer-optimized design
• Reduced surface tension
• Bolt-on installation
• MPN: JTR853.40