RK chain and sprocket kits are the perfect drive maintenance kit for your bike including a strong and durable 15T front and 45T rear steel sprocket constructed from SCM420 chromoly steel alloy (front) and C45 high carbon steel with a. electroplated Zinc finish (rear) paired with a high-quality Heavy Duty 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 reliable non-sealed economical chain for heavy-duty use manufactured from carbon alloy steel heat-treated and shot-peened for maximum strength and durability compared to standard chains. All RK chains are pre-stressed and pre-stretched for superior performance and to minimize elongation throughout the life of the chain. The best quality and cost performance combination for heavy-duty motorcycle applications. Fits: Honda CRF125F 2013-2022