2003 Kawasaki KLF250 Service Manual., Page 94Get this manual
ENGINE TOP END 4-35 Cylinder and Piston
Piston Ring Thickness
the ringring thickness Measure the pistonto measure at several points around Use micrometer
Piston Ring Thickness Standard Top: Second: 0.77 0.79 mm (0.0303 0.0311 in 1.17 1.19 mm (0.0461 0.0469 in
Service Limit 0.70 mm (0.028 in 1.10 mm (0.043 in
If any of the measurements is less than the service limit on either of the rings, replace all the rings
When using new rings in used piston, check for unPiston Ring End Gap Measurement