Chain & Sprocket Kit Contents: 13T Front Sprocket - SPF213313C 50T Rear Sprocket - SPR80850C 114 Link RK Chain - RKP520EXWX114 RK Kit Box - SPRKITBOX RK chain and sprocket kits are the perfect drive maintenance kit for your bike, including a strong and durable 13T front and 50T rear steel sprocket, constructed from SCM420 chromoly steel alloy (front) & C45 high carbon steel with a electroplated Zinc finish (rear) paired with a high-quality XW-ring RK chain this kit has everything you need to replace your old warped and stretched chain and sprockets. The perfect alternative to expensive OEM replacements while designed to meet and exceed OEM specifications. Supplied in presentable packaging with a carry handle for convenient transportation. About the Chain: 520EXW is specifically designed for ATV/Quads and off-road vehicles and is the best high-speed, extreme heat, off-road performance chain available today. EXW chains were developed to survive the abrasive conditions that exist in hostile off-road environments, with special heat treatment for thermal fatigue resistance. EXW Series features XW-Rings which extremely improve the chain life and lower friction, providing high performance under extreme conditions. With a maximum tensile strength rated at 10,430 Nm and suitable up to 750cc ATV / Quads and Off-Road bikes, 520EXW can handle anything you dish out! Fits: Suzuki RMX450Z 2009-2018