2001-2005 Yamaha WaveRunner GP800R Factory Service Manual, Page 106Get this manual
CYLINDERS
SERVICE POINTS
Cylinder inspection 1Eliminate:Carbon deposits (with rounded scraper )
2Inspect:Cylinder ater jacket Corrosionmineral depositsClean or replace! Cylinder inner surface Score arksReplace
3M easure:Cylinder bore" (with cylinder gauge) ut of specificationReplace cylinder and piston as setNOTE: easure the cylinder bore in parallel and at right angle to the crankshaftThen, average the easure ents