Chain & Sprocket Kit Contents: 16T Front Sprocket - SPF34716C 42T Rear Sprocket - SPR439942C 120 Link RK Chain - RKP530XSOX120 RK Kit Box - SPRKITBOX RK chain and sprocket kits are the perfect drive maintenance kit for your bike, including a strong and durable 16T front and 42T 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: Honda CBR1000RR Fireblade 2006-2016 CBR1000RR Fireblade ABS 2009-2016 2018