Checking The Camshafts - Yamaha Tenere 700 2020 Service Manual

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.
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)
G088946
3. Measure:
• Camshaft runout
Out of specification → Replace.
Camshaft runout limit
0.030 mm (0.0012 in)
1
4. Measure:
• Camshaft-journal-to-camshaft-cap clearance
Out of specification → Measure the camshaft
journal diameter.
Camshaft-journal-to-camshaft-
cap clearance
0.028–0.062 mm (0.0011–0.0024
in)
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.
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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®.
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)
d. Remove the camshaft caps, and then
measure the width of the Plastigauge®
"1".
5-14
CAMSHAFTS
1