2004-2006 Kawasaki 900 STX Jet Ski Service Manual, Page 91Get this manual
ENGINE TOP END 6-11 Engine Top End
If any of the cylinder inside diameter measurements exceeds the service limit, the cylinder will have to be replaced with new oneCylinder Inside Diameter Standard: 73.000 73.015 mm (2.874 2.875 in and less than 0.01 mm (0.0004 in difference between any two measurements Service Limit: 73.12 mm (2.88 in, or more than 0.05 mm (0.0020 in difference between any two measurements
Piston Diameter Measurement
of the piston 16.9 mm Measure the outside diameter [A] of the piston at right (0.67 in up [B] from the bottom angle to the direction of the piston pinPiston Diameter Standard: Service Limit: 72.895 72.910 mm (2.8699 2.8705 in 72.75 mm (2.86 in
If the measurement is less than the service limit, replace the piston
Abnormal wear such as marked diagonal pattern across the piston skirt may mean bent connecting rod or misaligned crankshaft