Yamaha YZF-R1 2020, Service Manual

Page: 311 / 822

CAMSHAFTS
5-28
f. Install the oil pipe bolts “4” and tighten
them temporarily.
TIP
Apply locking agent (LOCTITE®) onto the oil
pipe bolts.
g. Tighten the oil pipe bolts to the specified
torque following the tightening order
shown in the illustration.
EAS30269
INSTALLING THE CAMSHAFTS
1. Remove:
• Timing mark accessing bolt
• Crankshaft end cover
Refer to “GENERATOR” on page 5-43.
2. Align:
• Mark “a” on the generator rotor
(with the generator rotor cover slot “b”)
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”.
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.
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
T
R
.
.
Oil pipe 3 bolt
10 N·m (1.0 kgf·m, 7.4 lb·ft)
LOCTITE®
2
1
4
3
5
4
2 1
4
3
a
b
1 2
a b c c