um UXPW125 - Page 49

UXPW 125 ENGINE SERVICE MANUAL AND EFI DIAGNOSTIC
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5.4.4.8. Check gap of piston ring.
Install piston ring into cylinder block, and press
them down with piston. Check gap of each piston
ring with feeler gauge.
Limit value
Top ring
0.40mm
Second ring
0.40mm
Oil ring
0.85mm
5.4.4.9. Check for clearance between piston ring and ring
groove
Limit value
Top ring
0.10mm
Second ring
0.10mm
5.4.4.10. Assembly schematic diagram of piston rings