Yamaha Libero Workshop Manual page 106

R-105
ENGINE ASSEMBLY AND ADJUSTMENTS
WARNING
For Engine Assembly, replace the following
parts with new ones :
• O-Rings
• Gaskets
• Oil Seals
• Copper Washers
• Lock Washers
• Circlips
VALVES AND
INSTALLATION
1. Deburr :
• Valve Stem end ¿ Using an Oil Stone for
smoothing.
2. Apply :
• Molybdenum disulfide oil on the Valve
Stem and Oil Seal
Molybdenum Disulfide Oil
3. Install :
• Valve Spring Seat ¿
• Valve Stem Seal À
• Valve Á in the valve guide(Cylinder Head)
• Valve Spring Â
• Spring retainer Ã
NOTE :
Install the Valve Spring with the small pitch è
facing downward
ç facing upwards
è facing downward
4. Install :
• Valve Cotters ¿
NOTE :
Install the Valve Cotters while compressing the
valve spring with Valve Spring compressor À
Valve Spring Compressor :
YSST - 603
4-33
ENG
VALVE SPRINGS
New