Yamaha YZ450FP 2023, Owner'S Service Manual

Page: 258 / 388

STARTER CLUTCH
5-62
2. Install:
•
Balancer drive gear “1”
TIP
• Align the punched mark “a” on the balancer
drive gear with the punched mark “b” on the
balancer driven gear.
•
Install the balancer drive gear and crankshaft
with the lower splines “c” aligning with each
other.
3. Install:
• Lock washer “1”
•
Balancer driven gear nut “2”
• Starter clutch assembly “3”
•
Circlip “4”
• Starter reduction gear “5”
•
Collar “6”
• Primary drive gear “7”
•
Washer “8”
• Primary drive gear nut “9”
TIP
•
Apply engine oil to the starter clutch assembly.
• Install the starter clutch assembly with its man-
ufacturer’s mark facing outward.
• Apply engine oil to the inner surface and the
contact surfaces of the starter reduction gear.
• Apply engine oil to the contact surface of the
washer.
• Apply engine oil to the contact surface and
threaded portion of the primary drive gear nut.
• Place an aluminum plate “a” between the teeth
of the balancer drive gear “10” and balancer
driven gear “11”.
4. Bend the lock washer tab.
Balancer driven gear nut
50 N·m (5.0 kgf·m, 37 lb·ft)
Primary drive gear nut
120 N·m (12 kgf·m, 89 lb·ft)
1 1
1
c a
1 1 1
b
a
c
b
a
Ne w
T
R
.
.
T
R
.
.
1
2
3
4
5
6
8
9
7
10 10 10
2
a a
11 11 11
9 9
a a a
2
10 10 10
11
9 9 9