Yamaha WR250F 2021 - Page 264

OIL PUMP
5-64
4. Install:
• Oil pump assembly “1”
• Oil pump assembly bolt “2”
NOTICE
ECA13890
After tightening the bolts, make sure the oil
pump turns smoothly.
5. Install:
• Conical washer “1”
• Balancer weight gear nut “2”
• Primary drive gear “3”
• Conical washer “4”
• Primary drive gear nut “5”
• Balancer “6”
• Conical washer “7”
• Balancer nut “8”
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.
Oil pump assembly bolt
5 N·m (0.5 kgf·m, 3.7 lb·ft)
LOCTITE®
a
b
1
1
2
T
R
.
.
LT
1
2
2
Balancer weight gear nut
50 N·m (5.0 kgf·m, 37 lb·ft)
Primary drive gear nut
105 N·m (10.5 kgf·m, 77 lb·ft)
LOCTITE®
Balancer nut
38 N·m (3.8 kgf·m, 28 lb·ft)
New
T
R
.
.
New
T
R
.
.
New
T
R
.
.
b
2
a
a
2
10
10
9
1
2
10
9
1
b
5
3
a
a
4
4
10
10
5
5
9
9
3
3
E
LT