Yamaha WR250FM 2021 Owner's Service Manual page 264

1
1
2
4. Install:
• Oil pump assembly "1"
• Oil pump assembly bolt "2"
Oil pump assembly bolt
5 N·m (0.5 kgf·m, 3.7 lb·ft)
LOCTITE®
LT
2 2
ECA13890
NOTICE
After tightening the bolts, make sure the oil
pump turns smoothly.
a
b
1
5-64
5. Install:
• Conical washer "1"
New
• Balancer weight gear nut "2"
Balancer weight gear nut
50 N·m (5.0 kgf·m, 37 lb·ft)
• Primary drive gear "3"
• Conical washer "4"
New
• Primary drive gear nut "5"
Primary drive gear nut
105 N·m (10.5 kgf·m, 77 lb·ft)
LOCTITE®
• Balancer "6"
• Conical washer "7"
New
• Balancer nut "8"
Balancer nut
38 N·m (3.8 kgf·m, 28 lb·ft)
TIP
• Apply engine oil to the contact surfaces of the
conical washer and the balancer nut "8".
• Place an aluminum plate "a" between the teeth
of the balancer drive gear "9" and balancer
weight gear "10".
• Install the conical washer with its convex sur-
face "b" outward.
• Align the balancer flat portion "c" with the flat
portion "d".
• Apply LOCTITE® to the primary drive gear nut
"5" within the area shown in the illustration.
1 1
9 9
a a
9 9
5 5
4 4
3 3
LT
E
OIL PUMP
10 10 10
2 2
b 2
a a
10 10
3
b
5