Engine Cylinder Kits Piston for YZ85 2002-2020 YZ80 1993-2001 5PA-11311-20-00 This piston kit is designed for use with YZ85 models from 2002 to 2020 and YZ80 models from 1993 to 2001.It includes a cylinder, piston, piston rings, wrist pin, circlips, and gasket set.The components are engineered to meet specifications for proper fit and function.The piston is machined to standard size with precise tolerances to engine performance.This kit supports engine rebuilds and replacements for the specified models.5PA-11311-20-00.