2004 Polaris Freedom, Virage, Genesis and MSX-140 Service Manual., Page 101Get this manual
ENGINECOOLING SYSTEMS Engine AssemblyAll Engines 14Install each piston with arrow facing exhaust sideRing locating pins should be facing intake side
15Install remaining circlips into pistons using circlip installation toolAgain verify that gap is either upward or downward and clip is fully seated
16Install new base gaskets on upper crankcaseVerify that gaskets matches contour of upper crankcase opening before proceeding