The RK 4067-990EX OEM Replacement Chain and Sprocket Kit is designed for the Yamaha YZF-R6 model years 1999 through 2002. This complete drivetrain replacement kit includes OE gearing to help preserve the motorcycle’s original performance characteristics, acceleration response, and overall fitment. RK manufactures this kit for riders and technicians seeking a dependable, high-mileage solution for routine chain and sprocket replacement.
The kit includes a premium Driven® C45 steel alloy rear sprocket with a black case-hardened finish, paired with a Driven® C45 steel front sprocket that is case hardened and quenched for improved durability. These materials are selected to withstand the demands of street riding while supporting consistent power transfer between the engine and rear wheel. The natural chain finish provides a practical appearance suited to OEM-style service and replacement applications.
Fitment: This RK OEM Replacement kit is intended for Yamaha YZF-R6 motorcycles from 1999–2002. Verify the motorcycle model year and original gearing before installation to ensure compatibility. The manufacturer part number is 4067-990EX, and the vendor part number is also 4067-990EX. Install the chain and sprockets according to the motorcycle manufacturer’s service procedures, and inspect related drivetrain components during installation for wear or damage.
Features:
- Application: OEM replacement chain and sprocket kit for Yamaha YZF-R6 motorcycles from 1999–2002
- Brand: RK
- Part Number: 4067-990EX
- Manufacturer Part Number: 4067-990EX
- Vendor Part Number: 4067-990EX
- Gearing: OE gearing designed to maintain original fitment and performance characteristics
- Rear Sprocket: Premium Driven® C45 steel alloy construction with a black case-hardened finish
- Front Sprocket: Driven® C45 steel construction with case hardening and quenching
- Performance: High-mileage replacement design for dependable street use and consistent power transfer
- Finish: Natural chain finish with OEM-style replacement appeal