Replace or update your MX and offroad motorcycle's drivetrain components with an Acerbis Chain Guide and Slider Kit. Greater impact resistance thanks to the high-strength plastic material used The controlled elasticity structure of the chain guide absorbs shocks and minimizes damage to the chain and sprocket Two-piece kit: chain guide body and chain slide. No chain disassembly needed to fit either component Replacement parts available Fits: Honda CRF250R 2010-2013 CRF450R 2009-2012