Yamaha T135SE Service Manual page 140

VALVES AND VALVE SPRINGS
2. Remove:
9 valve cotters 1
2
NOTE:
Remove the valve cotters by compressing the
valve spring with the valve spring compressor
2 .
1
3. Remove:
9 upper spring seat 1
9 valve spring 2
9 valve stem seal 3
9 lower spring seat 4
9 valve 5
NOTE:
Identify the position of each part very carefully
so that it can be reinstalled in its original place.
EAS00239
CHECKING THE VALVES AND VALVE
GUIDES
The following procedure applies to all of the
valves and valve guides.
1. Measure:
9 valve-stem-to-valve-guide clearance
Valve-stem-to-valve-guide clearance =
Valve guide inside diameter
Valve stem diameter
Out of specification
guide.
4-24
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ENG
Valve spring compressor
90890-04019
Valve spring compressor
attachment
90890-04108
aa
bb
→ Replace the valve
Valve-stem-to-valve-guide clear-
ance
Intake
0.010 – 0.037 mm
(0.0004 – 0.0015 in)
<Limit>: 0.08 mm (0.0032 in)
Exhaust
0.025 – 0.052 mm
(0.001 – 0.002 in)
<Limit>: 0.10 mm (0.0039 in)
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