Yamaha MTN850-A 2017, Service Manual, Page: 250 / 560

CAMSHAFTS
5-15
shaft faces up.
•
When installing the camshaft, no need to align
the mark “b” on the camshaft sprocket.
5. Install:
•
Camshaft cap
• Intake camshaft cap
•
Exhaust camshaft cap
TIP
• Make sure each camshaft cap is installed in its
original place. Refer to the identification marks
as follows:
“IL”: Intake left side camshaft cap mark
“EL”: Exhaust left side camshaft cap mark
•
Make sure the arrow mark “a” on each cam-
shaft points toward the right side of the engine.
6. Tighten:
• Camshaft cap bolts
TIP
Tighten the camshaft cap bolts in the tightening
sequence as shown.
NOTICE
ECA17430
• Lubricate the camshaft cap bolts with the
engine oil.
• The camshaft cap bolts must be tightened
evenly or damage to the cylinder head,
camshaft caps, and camshafts will result.
• Do not turn the crankshaft when installing
the camshaft to avoid damage or improper
valve timing.
7. Tighten:
•
Camshaft cap bolts “1”
TIP
Tighten the camshaft cap bolts in stages and in
a crisscross pattern, working from the inner caps
out.
NOTICE
ECA17430
• Lubricate the camshaft cap bolts with the
engine oil.
• The camshaft cap bolts must be tightened
evenly or damage to the cylinder head,
camshaft caps, and camshafts will result.
• Do not turn the crankshaft when installing
the camshaft to avoid damage or improper
valve timing.
Camshaft cap bolt
10 N·m (1.0 kgf·m, 7.2 lb·ft)
1
2
a
a
b
b
a
a
IL
EL
T
R
.
.
Camshaft cap bolt
10 N·m (1.0 kgf·m, 7.2 lb·ft)
1
2
3
4
5
6 7
8
T
R
.
.