Race-Driven Red (Non O Ring) Chain and Sprocket Kit. Fits the following models: 2004-2013 Yamaha YFM350 Raptor You will receive the following: 1 - 520-98 Red Chain (Tensile Strength Over 8200 lbs) 1 - 12 Tooth Steel Front Sprocket, 1 - 40 Tooth Steel Rear Sprocket, Race-Driven Chains have a tensile strength of over 8200 lbs.