Yamaha TT-R50E, Owner'S Service Manual

Page: 212 / 390

4 - 13
ENG
CYLINDER HEAD
4. Remove:
• Cylinder head
NOTE:
• Loosen the bolts and nuts in their proper
loosening sequence.
• Start by loosening each bolt and nut 1/2 turn
until all are loose.
1
2
5
6
4
3
ASSEMBLY AND INSTALLATION
1. Install:
• Cylinder head
2. Tighten:
• Nuts
• Bolts
NOTE:
• Apply the engine oil on the contact surfaces
of the nuts and copper washers.
• Apply the engine oil on the thread and con-
tact surface of the bolts.
• Follow the numerical order shown in the illus-
tration. Tighten the bolts and nuts in two
stages.
6
5
2
1
3
4
T
R .
.
22 Nm (2.2 m · kg, 16 ft · lb)
T
R .
.
10 Nm (1.0 m · kg, 7.2 ft · lb)
3. Install:
• Camshaft sprocket
1
Installation steps:
• Turn the crankshaft counterclockwise until
the “I” mark
a
on the rotor is aligned with
the stationary pointer
b
on the crankcase
cover.
• Align the “I” mark
c
on the camshaft
sprocket with the stationary pointer
d
on
the cylinder head.
• Fit the timing chain
2
onto camshaft
sprocket and install the camshaft sprocket
on the camshaft.
NOTE:
When installing the camshaft sprocket, keep
the timing chain as tense as possible on the
exhaust side.
b
a
1
2
c
d