Yamaha 2007 XP500 Service Manual page 236

3. Install:
Valve "1"
G
Lower spring seat "2"
G
Valve stem seal "3"
G
Valve spring "4"
G
Upper spring seat "5"
G
(into the cylinder head)
NOTE:
Make sure each valve is installed in its original
G
place.
Install the valve springs with the larger pitch "a"
G
facing up.
a. Smaller pitch
4. Install:
Valve cotters "1"
G
NOTE:
Install the valve cotters by compressing the
valve spring with the valve spring compressor
"2" and the valve spring compressor attachment
"3".
VALVES AND VALVE SPRINGS
Valve spring compressor
90890-04019
YM-04019
Valve spring compressor attach-
ment
90890-04114
Valve spring compressor adapter
19.5 mm
YM-04114
5. To secure the valve cotters onto the valve
stem, lightly tap the valve tip with a soft-face
hammer.
ECA13800
CAUTION:
Hitting the valve tip with excessive force
could damage the valve.
6. Lubricate:
Valve pad
G
Valve lifter
G
(with the recommended lubricant)
Recommended lubricant
Molybdenum disulfide oil
7. Install:
Valve pad
G
Valve lifter
G
ECA15B1026
CAUTION:
After making sure that the valve pads are ful-
ly inserted, install the valve lifter taking care
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