1set Motorcycle Engine Bore 77mm JUG Cylinder Stock OE# 5XC-11311-20-00 Fits For WR250F YZ250F 2001-2013 Motorcycle Parts Material: cast aluminum Compatibility: designed for WR250F and YZ250F models from 2001 to 2013 Performance: engineered for precise fit and engine Package Contents: 1 piece cylinder, 1 set piston rings, pin, and clips Installation: designed for direct installation without modifications OEM 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, 5XC-11311-10-00 The 77mm bore cylinder is constructed from cast aluminum to provide a balanced combination of durability and reduced weight.It is built to match the specifications of for consistent performance and fitment on compatible models.The included components—piston rings, pin, and clips—allow for a complete assembly setup.This unit is intended to support efficient engine function and deliver dependable results under regular operating conditions. This product is not manufactured by the brand.Model and brand mentions are for compatibility guidance only.