Yamaha T135SE Service Manual page 141

VALVES AND VALVE SPRINGS
2. Replace:
9 valve guide
NOTE:
To ease valve guide removal and installation,
and to maintain the correct fit, heat the cylinder
head to 100 ° C in an oven.
a. Remove the valve guide with the valve
guide remover 1 .
b. Install the new valve guide with the valve
guide installer 2 and valve guide remover
1 .
c. After installing the valve guide, bore the
valve guide with the valve guide reamer
to obtain the proper valve-stem-to-valve-
guide clearance.
NOTE:
After replacing the valve guide, reface the valve
seat.
3. Eliminate:
9 carbon deposits
(from the valve face and valve seat)
4. Check:
9 valve face
Pitting/wear → Grind the valve face.
9 valve stem end
Mushroom shape or diameter larger than
the body of the valve stem
valve.
5.Measure:
9 valve margin thickness a
Out of specification Replace the valve.
4-25
http://www.motorcycle.in.th
ENG
Valve guide remover (4.5 mm)
90890-04116
Valve guide installer (4.5 mm)
90890-04117
Valve guide reamer (4.5 mm)
90890-04118
→ Replace the
Valve margin thickness
Intake: 0.5 – 0.9 mm
(0.0197 – 0.0433 in)
Exhaust: 0.5 – 0.9 mm
(0.0197 – 0.0433 in)
3