Yamaha MTN850-A 2017 Service Manual page 250

shaft faces up.
• When installing the camshaft, no need to align
the mark "b" on the camshaft sprocket.
a
2
b
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
Camshaft cap bolt
10 N·m (1.0 kgf·m, 7.2 lb·ft)
a
1
b
a
IL
EL
a
5-15
TIP
Tighten the camshaft cap bolts in the tightening
sequence as shown.
ECA17430
NOTICE
• 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.
8
5
2 3
4 1
6
7
7. Tighten:
• Camshaft cap bolts "1"
Camshaft cap bolt
10 N·m (1.0 kgf·m, 7.2 lb·ft)
TIP
Tighten the camshaft cap bolts in stages and in
a crisscross pattern, working from the inner caps
out.
ECA17430
NOTICE
• 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.
CAMSHAFTS