Motorcycle 77mm Engine Cylinder 250CC Kit Motor for WR250F YZ250F YZ250 F 2001-2013 Motocross Motoblock Parts This engine cylinder kit is designed for WR250F and YZ250F models from 2001 to 2013.Constructed from cast aluminum, the cylinder offers performance and efficient heat dissipation.With a 77mm bore diameter, it is engineered to improve power and torque output, suitable for motocross and off-road riding applications. The kit includes one cylinder, one set of piston rings, a piston pin, and clips, providing all necessary components for installation.It is designed for direct fitment without requiring modifications, allowing for straightforward replacement or upgrade.The included OEM part numbers 5XC-11311-20-00, 5NL-11311-00-00, 5NL-11631-20-00, 5UL-11311-00-00, 5XC-11311-00-00, 5XC-11311-01-00, and 5XC-11311-10-00 support compatibility verification with.This cylinder kit provides a functional upgrade for riders seeking improved engine performance and. Compatibility Notice: This is an aftermarket product.Mention of brands is for fitment identification only.