Description
Yamaha Blaster Rear Sprocket
Replace a worn Yamaha Blaster rear sprocket with this JT 40-tooth steel sprocket. Designed for a 520 chain, it provides the standard rear tooth count listed by JT for the Yamaha Blaster.
Specifications and Fitment
- Brand: JT Sprockets
- Part number: JTR853.40
- Position: Rear
- Tooth count: 40
- Chain size: 520
- Material: Heat-induction-hardened high-carbon steel
- Finish: Black
- Application: Yamaha Blaster YFS200, 1988–2006
- Quantity: One sprocket
JT’s catalog identifies JTR853 as its steel rear sprocket and lists the 40-tooth version for both 1988–1998 and 1999–2006 Blasters. jtsprockets.com
Gearing and Installation
Rear tooth count works together with the front sprocket to determine final gearing. Check your current setup before ordering.
Inspect the chain and front sprocket when replacing the rear sprocket. Follow Yamaha’s mounting, torque and chain-adjustment procedures.
Shop more Yamaha Blaster parts at The Blaster Store.
Questions about fitment? Contact KOR or call (860) 230-5003.











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