um UXPW125 - Page 36

UXPW 125 ENGINE SERVICE MANUAL AND EFI DIAGNOSTIC
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4.4.2. Check of cylinder head assembly
4.4.2.1. Check the cylinder Head combustion chamber,
clean the carbon deposit;
4.4.2.2. Check valve spring for free length.
In: 38.5 – 39.5 mm
Outer: 41.5 – 42.5 mm
4.4.2.3. Inspection flatness on end face of cylinder
head
4.4.2.4. Wear inspection of Valve stem