Yamaha YFM50S Service Manual page 100

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1
1
CYLINDER HEAD
i. If the marks are aligned, temporarily tighten
the camshaft sprocket bolt. If the marks are
not aligned, change the meshing position of
the camshaft sprocket and timing chain.
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3. Install:
• timing chain tensioner assembly
3
• timing chain tension adjuster
NOTE:
• Align the timing chain tensioner rod groove
1 with the timing chain tensioner straight
4
plug projection 2.
• The flat surface 3 of the timing chain ten-
sioner rod should face towards the adjuster
threaded hole 4.
_
Always use a new gasket.
4. Adjust:
• timing chain tensioner
Refer to "ADJUSTING THE TIMING CHAIN
TENSIONER" in chapter 3.
5. Tighten:
• camshaft sprocket bolt 1
NOTE:
_
• Use the sheave holder 2 to hold the rotor.
• Do not allow the sheave holder to touch the
projection on the rotor.
2
6. Check:
• camshaft sprocket alignment mark
• rotor "T" mark
Out of alignment → Adjust.
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18 Nm (1.8 m · kg, 13 ft · lb)
WARNING
20 Nm (2.0 m · kg, 14 ft · lb)
Sheave holder
P/N. YS-01880-A, 90890-01701
ENG
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