UXPW 125 ENGINE SERVICE MANUAL AND EFI DIAGNOSTIC
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4.2.5 Detecting oil passage and clean it using air gun
4.2.6 Assemble bolts and washers after the head cover
is checked (Need to be replaced old washer by a new
one)
4.2.7 Assembly location pin and a new O-ring
4.2.8 Clean the sealing ring groove and mount a new
cover sealing gasket, after that, assemble to the
cylinder head together.