General description The Cylinder Kit for Yamaha YZ85 and YZ80 is a complete standard-sized replacement kit designed for optimal performance. It includes all necessary components for installation, ensuring your motorcycle runs smoothly. Technical specifications Cylinder Bore: 47.50 mm Cylinder Stroke: 47.80 mm Cylinder Displacement: 85 cc Compression Ratio: 8.2:1 OEM Part Numbers: 43K-11611-00-00, 4ES-11311-20-00, 4ES-11311-30, 4ES-11311-30-00, 4ES-11351-00-00, 4ES-11631-01-A0, 4ES-11633-00-00, 5PA-11311-20-00, 5PA-11311-30-00, 5PA-11631-00-D0, 93210-56459-00, 93210-84724-00, 93450-16115-00 Compatibility and accessories Compatible with Yamaha YZ85 (2002-2018) Compatible with Yamaha YZ80 (1993-2001) Includes: 1x Cylinder, 1x Gasket, 1x Piston, 1x Piston Clip, 2x Piston Circlips, 1x Piston Ring, 2x O-rings, 2x Dowel Pins, 1x Needle Bearing Installation Professional installation is highly recommended. Instructions are included with the kit.