Installing The Camshafts - Yamaha R1 Series 2015 Service Manual

EAS30269

INSTALLING THE CAMSHAFTS

1. Remove:
• Timing mark accessing bolt "1"
• Crankshaft end cover "2"
2
2. Align:
• Mark "a" on the generator rotor
(with the generator rotor cover slot "b")
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a. Turn the crankshaft counterclockwise.
b. When piston #1 is at BTDC105 , align the
BTDC105 mark "a" on the generator rotor
with the generator rotor cover slot "b".
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3. Install:
• Exhaust camshaft "1"
• Intake camshaft "2"
TIP
• Hang the timing chain on the sprocket from the
exhaust camshaft to the intake camshaft.
• The intake camshaft sprocket timing mark "a"
and exhaust camshaft sprocket timing mark "b"
should align with the cylinder head surface "c".
• Check the timing mark position of the camshaft
sprocket using a mirror.
• The timing chain (exhaust side) should be
stretched and the timing chain (intake side)
should be sagged.
c a
1
4. Install:
• Camshaft cap
TIP
Make sure each camshaft cap is installed in its
original place. Refer to the identification marks
as follows:
"1": camshaft cap mark for cylinder #1
"2": camshaft cap mark for cylinder #2
"3": camshaft cap mark for cylinder #3
"4": camshaft cap mark for cylinder #4
4
b
a
5. Tighten:
• Camshaft cap bolts
TIP
• If the camshaft cap bolt is a new one, it is not
necessary to apply engine oil onto the mating
surface and threads of the bolt.
• If the camshaft cap bolt is a new one, tighten it
to 10 Nm (1.0 m·kgf, 7.2 ft·lbf).
• 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
5-19
CAMSHAFTS
2 1
3 2
Camshaft cap bolt
8 Nm (0.8 m·kgf, 5.8 ft·lbf)
Camshaft cap bolt (new)
10 Nm (1.0 m·kgf, 7.2 ft·lbf)
b c
1