Yamaha Tenere 700 2020, Service Manual

Page: 201 / 472

CAMSHAFTS
5-14
EAS30257
CHECKING THE CAMSHAFTS
1. Check:
• Camshaft lobes
Blue discoloration/pitting/scratches
→
Re-
place the camshaft.
2. Measure:
• Camshaft lobe dimensions “a” and “b”
Out of specification
→
Replace the camshaft.
3. Measure:
• Camshaft runout
Out of specification
→
Replace.
4. Measure:
• Camshaft-journal-to-camshaft-cap clearance
Out of specification
→
Measure the camshaft
journal diameter.
a. Install the camshafts into the cylinder head
(without the camshaft caps).
b. Position a strip of Plastigauge® “1” onto
the camshaft journal as shown.
c. Install the dowel pins and camshaft caps.
TIP
• Tighten the camshaft cap bolts in stages and in
a crisscross pattern, working from the inner
caps out.
• Do not turn the camshaft when measuring the
camshaft journal-to-camshaft cap clearance
with the Plastigauge®.
d. Remove the camshaft caps, and then
measure the width of the Plastigauge®
“1”.
Camshaft lobe dimensions
Lobe height (Intake)
35.610–35.710 mm (1.4020–
1.4059 in)
Limit
35.510 mm (1.3980 in)
Lobe height (Exhaust)
35.710–35.810 mm (1.4059–
1.4098 in)
Limit
35.610 mm (1.4020 in)
Camshaft runout limit
0.030 mm (0.0012 in)
1
G0 88 946
Camshaft-journal-to-camshaft-
cap clearance
0.028–0.062 mm (0.0011–0.0024
in)
T
R
.
.
Exhaust camshaft cap bolt
10 N·m (1.0 kgf·m, 7.4 lb·ft)
Intake camshaft cap bolt
10 N·m (1.0 kgf·m, 7.4 lb·ft)
1
G0 88 947