1set 77mm Cylinder & Pistons 5XC-11311-20-00 For 2001-2013 WR250F YZ250F Standard Bore Motorcycle Parts Material: grade aluminum Compatibility: Designed for WR250F and YZ250F models from 2001 to 2013 Performance: Engineered for fit and performance, supporting consistent engine output Installation: Designed for straightforward installation without modifications Package Contents: Includes 1 cylinder, 1 set of piston rings, 1 pin, and 1 set of clips OEM: Replaces 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 This 77mm cylinder and piston set is constructed from grade aluminum to support durability under demanding riding conditions.It serves as a direct replacement for the specified OEM parts, compatibility with select WR250F and YZ250F models.The standard bore size maintains engine specifications while supporting power delivery.All necessary components are included for complete assembly, providing a practical solution for engine maintenance or rebuilds.