1998-2004 Yamaha WaveRunner XL700 XL760 XL1200 Factory Service Manual, Page 94Get this manual
'''''''''''''''''' '''''' SERVICE POINTS
Piston pin clip removal and installation 1Remove and install: Piston pin clip
NOTE:Before removing and installing piston pin clip, cover crankcase with clean rag to prevent piston pin clip from falling into crankcase cavityPiston inspection 1Eliminate: Carbon deposits From the piston crown and ring groove
2Inspect: Piston wall Score marks Repair or replaceUse #600800 grit wet sandpaper