Yamaha 2009 VMX17YC, Service Manual

Page: 292 / 583

CAMSHAFTS
5-19
5. Install:
• Intake camshaft cap bolts
NOTICE
ECA2S31035
The camshaft cap bolts must be tightened
evenly; otherwise, the cylinder head, cam-
shaft caps, and camshaft will be damaged.
TIP
• Lubricate the camshaft cap bolt mating surface
with molybdenum disulfide oil.
• Tighten the camshaft cap bolts in stages and in
a crisscross pattern.
6. Install:
• Timing chain guide
7. Install:
• Timing chain tensioner gasket “1”
• Timing chain tensioner “2”
TIP
• Be sure to install the timing chain tensioner
gasket so that its projection “a” is protruding
from the upper left side of the timing chain ten-
sioner.
• The arrow mark “b” on the timing chain ten-
sioner should face up.
8. Rotate the crankshaft counterclockwise a few
times to release the timing chain tensioner
rod.
TIP
If the timing chain tensioner rod does not re-
lease, rotate the crankshaft clockwise.
9. Check that the timing chain is taut. If the
chain is slack, reinstall the timing chain ten-
sioner.
Front cylinders-exhaust side
1. Find:
• Front cylinders-exhaust camshaft installation
position
▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼▼▼
a. Make sure that the “F” mark on the generator
rotor is aligned with the stationary pointer on
the generator cover.
b. Turn the crankshaft about a turn and 1/3 (497
degrees) counterclockwise until the “T2”
mark “a” on the generator rotor is aligned with
the stationary pointer “b” on the generator
cover.
TIP
Piston #2 is at TDC when the “T2” mark on the
generator rotor is aligned with the stationary
pointer on the generator cover.
T
R
.
.
Intake camshaft cap bolt
10 Nm (1.0 m·kgf, 7.2 ft·lbf)
T
R
.
.
Timing chain tensioner bolt
10 Nm (1.0 m·kgf, 7.2 ft·lbf)
LOCTITE®
a
b
New
2
1
a
b
New