Checking The Decompression System; Installing The Cylinder Head - Yamaha YZF-R15 Service Manual

CHECKING THE DECOMPRESSION SYSTEM

1. Check:
• Decompression system
a. Check the decompression system with the
camshaft sprocket and the decompression
cam installed to the camshaft.
b. Check that the decompression lever "1"
moves smoothly.
c. Without operating the decompression lever,
check that the decompression cam "2"
projects from the camshaft (exhaust cam) as
shown in the illustration "A".
d. Move the decompression lever "1" in the di-
rection of the arrow shown and check that the
decompression cam does not project from
the camshaft (exhaust cam) as shown in the
illustration "B".
1
A
2
5-10
CYLINDER HEAD
B

INSTALLING THE CYLINDER HEAD

1. Install:
• Cylinder head
NOTE:
Pass the timing chain through the timing chain
cavity.
2. Tighten:
• Cylinder head bolts "1"
Cylinder head bolt
22 Nm (2.2 m·kg, 16 ft·lb)
• Cylinder head bolts "2"
Cylinder head bolt
10 Nm (1.0 m·kg, 7.2 ft·lb)
NOTE:
• Lubricate the cylinder head bolts with engine
oil.
• Tighten the cylinder head bolts in the proper
tightening sequence as shown and torque
them in two stages.
1
1
4
3. Install:
• Camshaft sprocket
a. Turn the crankshaft counterclockwise.
b. Align the "I" mark "a" on the magneto rotor
with the stationary pointer "b" on the magneto
cover.
2
2
3
5
6
2
2