Removing The Camshaft - Yamaha YZ450FX 2019 Owner's Service Manual

EAM30080

REMOVING THE CAMSHAFT

1. Remove:
• Timing mark accessing screw "1"
• Crankshaft end accessing screw "2"
2. Align:
• Alignment mark
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a. Turn the crankshaft counterclockwise with a
wrench.
b. Align the top dead center (TDC) mark "a" on
the rotor with the alignment mark "b" on the
crankcase cover.
TIP
Align the alignment mark "c" on the exhaust
camshaft sprocket and the alignment mark "d"
on the intake camshaft sprocket with the edge of
the cylinder head.
d
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3. Remove:
• Timing chain tensioner cap bolt "1"
• Timing chain tensioner "2"
• Gasket
1
4. Remove:
2
• Bolt (camshaft cap) "1"
• Camshaft cap "2"
• Clip "3"
TIP
• Remove the bolts (camshaft cap) in a criss-
cross pattern, working from the outside in.
• In order to prevent the clip from falling into the
crankcase, remove the camshaft cap.
ECA24610
NOTICE
The bolts (camshaft cap) must be removed
evenly to prevent damage to the cylinder
head, camshafts or camshaft caps.
b
a
c
5. Remove:
• Exhaust camshaft "1"
• Intake camshaft "2"
TIP
Attach a wire "3" to the timing chain to prevent it
5-13
2 2 2
2 2 2
3
CAMSHAFT
1 1
1 1