ApplicationCompatible for Yamaha YZ85 2002-2018 compatible for Yamaha YZ80 1993 - 2001Part Number43K-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,SizeCylinder Bore and Stroke 47.50mm x 47.80mmFeaturesSize: Cylinder Bore and Stroke 47.50mm x 47.80mm100% Brand New Complete Standard Sized Replacement Cylinder Kit Cylinder Bore and Stroke 47.50mm x 47.80mm Cylinder Displacement 85cc / Compression 8.2:1 Professional Installation is Highly Recommended (No Instruction Included)Package IncludesCylinder, Piston, Piston Ring, Wristpin, Circlips (2), Needle Bearing, Base Gasket, O-Ring #1, O-Ring #2, Just as the picture shown