2003 Polaris MSX 140 Personal Watercraft Service Manual, Page 67Get this manual
EngineCooling W120HO- DFI Engine Inspection 4Clean needle bearing in solvent and dry with compressed air5Inspect needle cage carefully for cracks or shiny spots which indicate wearReplace needle bearings if worn or cracked, and always replace them if piston damage has occurred
6Visually inspect piston pin for damage, discoloration, or wearRun your fingernail along the length of the pin and replace it if any rough spots, galling or wear is detectedMeasure piston pinPiston Pin Diameter 19.99519.998mm