1998-2004 Yamaha WaveRunner XL700 XL760 XL1200 Factory Service Manual, Page 227Get this manual
SERVICE POINT Piston inspection 1Eliminate: Carbon deposits Fro the piston cro and ring groove
2Inspect: Piston all Score arksRepair or replaceUse #600 800 grit et sandpaperNOTE: Sand in criss-cross patternDo not sand excessively3M easure: Piston skirt dia eter Use micro eterO ut of specificationReplacePiston diameter 80.925 80.950 mm (3.186 3.187 in) Distance 10 mm (0.39 in)