Chain & Sprocket Kit Contents: 13T Front Sprocket - SPF211713C 48T Rear Sprocket - SPR48948C 120 Link RK Chain - RKP520XSOX120 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 48T 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 RX-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: RK's XSO series are designed for your everyday motorcycle use, providing a light acceleration feel with adamant strength. Featuring RX-rings that have X shaped seals improving the wear life up to two times longer than standard O-ring chains. Viewed in cross-section, the RK "RX-Ring" has two contact lips and one lubrication pool versus the single seal point/pool design of a regular o-ring chain. RK's XSO chains offer quality, performance and unbeatable value, for all but the most demanding high-performance application. Fits: Kawasaki KX250F 2004