Suzuki DF 25 Service Manual page 161

7-44 POWER UNIT
PISTON RING
Piston ring end gap
Measure piston ring end gap with piston ring in the lowest posi-
tion of cylinder bore.
09900-20803: Thickness gauge
Piston ring end gap
Standard:
1st. 0.12 – 0.27 mm (0.005 – 0.011 in.)
2nd. 0.35 – 0.50 mm (0.014 – 0.020 in.)
Service limit :
1st. 0.70 mm (0.028 in.)
2nd. 1.00 mm (0.039 in.)
If measurement exceeds service limit, replace position ring.
Piston ring free end gap
Measure piston ring free end gap using vernier calipers.
09900-20101 : Vernier calipers
Piston ring free end gap
Standard :
1st. Approx. 9.1 mm (0.36 in.)
2nd. Approx. 9.0 mm (0.35 in.)
Service limit :
1st. 7.3 mm (0.29 in.)
2nd. 7.2 mm (0.28 in.)
If measurement exceeds service limits, replace piston ring.
Cylinder
Piston ring