CYLINDER WORKS offers you the same cylinder as the original one for your motocross YAMAHA YZ250F, YZF 250cc 4 stroke from 2014 to 2015 and YAMAHA WR250F, WRF 250cc 4 stroke from 2015 to 2017. This Ø77mm aluminum kit has the same characteristics as your original cylinder, it is however less expensive than the one you can get in a dealership. This complete top engine is of a very high quality and finish. The coating is made of nickel and silicon carbide to guarantee a minimal friction surface and to increase the reliability and duration of your cylinder. But it also allows you to have more torque and performance than the original engine. Let's talk about the piston. It is manufactured by VERTEX which is one of the largest manufacturers of high-end pistons in the world. The head of the piston is worked to allow an excellent engine compression. It is moreover graphite to have a better lubrication during are passage. You will have understood that this kit is a quality cylinder, more powerful than your original kit and that will be more reliable has long therm. This cylinder is of course sold complete. It includes the cylinder, piston, ring, axle, clips as well as the complete seal pack. You will not need anything else to reassemble this product. A list of vehicle adaptable on this kit is below. Contractual photo to come.