2003 Kawasaki JetSki 800 SX-R Factory service manual, Page 97Get this manual
ENGINE TOP END 5-13 Engine Top End
Piston Ring End Gap
Place the piston ring inside the cylinder, using the piston to locate the ring squarely in placeSet it close to the bottom of the cylinder, where cylinder wear is lowMeasure the gap [A] between the ends of the ring [B] with thickness gaugeIf the gap is wider than the service limit, the ring is worn excessively and must be replacedPiston Ring End Gap