2003 Polaris MSX 140 Personal Watercraft Service Manual, Page 65Get this manual
EngineCooling W120HO- DFI Engine Disassembly 19Carefully remove each cylinder from the engine
20Using small screwdriver, pry the circlips out of each pistonCAUTION: The circlip is under tensionWear eye protectionKeep your thumb on the edge of the clip to prevent it from springing out21Using piston pin puller, remove the pins from each piston