5-17
CAMSHAFTS
REMOVING THE CAMSHAFT
1. Remove:
• Timing mark accessing screw "1"
• Crankshaft end accessing screw
"2"
2. Align:
• T.D.C. mark
With align mark.
Checking steps:
a. Turn the crankshaft counterclock-
wise with a wrench.
b. Align the T.D.C. mark "a" on the
rotor with the align mark "b" on the
crankcase cover when piston is at
T.D.C. on compression stroke.
In order to be sure that the piston is at
Top Dead Center, the punch mark "c"
on the exhaust camshaft and the
punch mark "d" on the intake cam-
shaft must align with the cylinder
head surface, as shown in the illustra-
tion.
3. Remove:
• Timing chain tensioner cap bolt
"1"
• Timing chain tensioner "2"
• Gasket
4. Remove:
• Bolt (camshaft cap) "1"
• Camshaft cap "2"
• Clip
Remove the bolts (camshaft cap) in a
crisscross pattern, working from the
outside in.
The bolts (camshaft cap) must be
removed evenly to prevent dam-
age to the cylinder head, cam-
shafts or camshaft caps.
5. Remove:
• Exhaust camshaft "1"
• Intake camshaft "2"
Attach a wire "3" to the timing chain to
prevent it from falling into the crank-
case.
CHECKING THE CAMSHAFT
1. Inspect:
• Cam lobe
Pitting/scratches/blue discolor-
ation
→
Replace.
2. Measure:
• Cam lobe length "a" and "b"
Out of specification
→
Replace.
Cam lobes length:
Intake "a":
30.100–30.200 mm
(1.1850–1.1890 in)
<Limit>:
30.000 mm (1.1811 in)
Intake "b":
22.450–22.550 mm
(0.8839–0.8878 in)
<Limit>:
22.350 mm (0.8799 in)
Exhaust "a":
30.200–30.300 mm
(1.1890–1.1929 in)
<Limit>:
30.100 mm (1.1850 in)
Exhaust "b":
22.450–22.550 mm
(0.8839–0.8878 in)
<Limit>:
22.350 mm (0.8799 in)
Summary of Contents for 2010 WR450FZ
Page 4: ......
Page 12: ...1 2 LOCATION OF IMPORTANT LABELS EUROPE ...
Page 13: ...1 3 LOCATION OF IMPORTANT LABELS AUS NZ ZA ...
Page 49: ...2 18 TIGHTENING TORQUES ...
Page 51: ...2 20 LUBRICATION DIAGRAMS 1 Intake camshaft 2 Exhaust camshaft A To main axle B From oil pump ...
Page 90: ...3 31 ELECTRICAL Charging method using a variable voltage charger ...
Page 91: ...3 32 ELECTRICAL Charging method using a constant voltage charger ...
Page 125: ...5 22 CYLINDER HEAD 3 Install Bolt cylinder head 1 Bolt cylinder head 10 Nm 1 0 m kg 7 2 ft lb ...
Page 144: ...5 41 OIL PUMP 15 Oil pump drive shaft 1 16 Rotor housing 1 Order Part name Q ty Remarks ...
