Yamaha Tenere 700 2020, Service Manual

Page: 216 / 472

VALVES AND VALVE SPRINGS
5-29
2. Replace:
• Valve guide
TIP
To ease valve guide removal and installation,
and to maintain the correct fit, heat the cylinder
head to 100 °C (212 °F) 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 remov-
er “1”.
c. After installing the valve guide, bore the
valve guide with the valve guide reamer
“3” to obtain the proper valve-stem-to-
valve-guide clearance.
TIP
After replacing the valve guide, reface the valve
seat.
3. Eliminate:
• Carbon deposits
(from the valve face and valve seat)
Valve-stem-to-valve-guide clear-
ance (intake)
0.010–0.037 mm (0.0004–0.0015
in)
Limit
0.080 mm (0.0032 in)
Valve-stem-to-valve-guide clear-
ance (exhaust)
0.025–0.052 mm (0.0010–0.0020
in)
Limit
0.100 mm (0.0039 in)
G0 88 960
G0 88 961
G0 88 962
Valve guide position
14.8–15.2 mm (0.58–0.60 in)
a. Valve guide position
Valve guide remover (ø4.5)
90890-04116
Valve guide remover (4.5 mm)
YM-04116
Valve guide installer (ø4.5)
90890-04117
Valve guide installer (4.5 mm)
YM-04117
Valve guide reamer (ø4.5)
90890-04118
Valve guide reamer (4.5 mm)
YM-04118
G0 88 96 3
G0 88 964