um UXPW125, Service Manual, Page: 50 / 110

UXPW
125 ENGINE SERVICE MANUAL AND EFI DIAGNOSTIC
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Note:
•
Do not damage piston and piston rings during assembling.
•
Check if piston ring can rotate freely on the piston without any seizure after rings are
assembled.
•
After piston rings are assembled, the splits of piston rings must be placed away from each
to other by 120°
•
Incorrect assembly of piston rings will directly cause oil burning, abnormal wear and tear
of piston.
5.4.5 piston /cylinder block installation
When checking cylinder block and piston, place a clean
cloth at crankcase to guard against dust and stranger
bodies fall into crankcase.
Clean off paper gasket, oil and other stranger bodies
from matching surface between crankcase and cylinder
block before installing cylinder block and piston.