Retail $305.95 Kawasaki KX250F 2017-2020 Kawasaki KX450F 2016-2018 Insert Description: The Pro Circuit Carbon Fiber Chain Guide reduces the possibility of chain derailment, is durable and offers a stylish look. The chain guide includes a carbon fiber bracket as well as a block insert. The bracket extends farther towards the rear wheel than an OEM bracket, allowing for a precise feed of the chain directly from the guide to the sprocket. The block insert is CNC-machined from high-density polyethylene, providing a durable, long wearing and low friction surface for the chain to ride. The insert fits tightly within the bracket and wraps around the front face to provide wear protection. The insert can be purchased on its own as a replacement if needed.