2003 Polaris 3 PRO X Factory Service Manual, Page 49Get this manual
ENGINE Engine AssemblyContinued
9Install pistons with arrow (") on piston facing flywheel, with locating pins to intake sideInstall C-clips securely in piston grooveNOTE: CClip should be facing with the open end up10Lubricate rings and pistons with two stroke oilInstall rings with letter, mark, or beveled side facing upward