Suzuki LT-Z90 Manual page 81

PISTON PIN AND PIN BORE
Measure the piston pin bore diameter using the small bore
gauge. If the measurement is out of specifications replace the
piston.
Piston pin bore I.D.:
Service Limit: 14.030 mm (0.5523 in)
09900-20605: Dial caliper gauge (10 – 34 mm)
Measure the piston pin outside diameter at three positions using
the micrometer. If any of the measurements are out of specifica-
tion, replace the piston pin.
Piston pin O.D.:
Service Limit: 13.980 mm (0.5503 in)
09900-20205: Micrometer (0 – 25 mm)
PISTON-RING-TO-GROOVE CLEARANCE
Measure the side clearances of the 1st and 2nd piston rings
using the thickness gauge. If any of the clearances exceeds the
limit, replace both the piston and piston rings.
09900-20803: Thickness gauge
09900-20202: Micrometer (25 – 50 mm)
Piston-ring-to-groove clearance
Service Limit:
1st: 0.180 mm (0.0071 in)
2nd: 0.150 mm (0.0059 in)
Piston ring groove width
Standard:
1st: 1.01 – 1.03 mm (0.0381 – 0.389 in)
2nd: 1.01 – 1.03 mm (0.0381 – 0.0389 in)
Oil: 2.01 – 2.03 mm (0.0791 – 0.0799 in)
ENGINE 3-33