Installing The Oil Pump And Balancer Gear - Yamaha WR250F 2016 Owner's Service Manual

INSTALLING THE OIL PUMP AND BALANC-
EAS2GB7304
ER GEAR
1. Install:
• Oil pump assembly "1"
• Oil pump assembly bolt "2"
Oil pump assembly bolt
5 Nm (0.5 m·kgf, 3.6 ft·lbf)
LOCTITE®
LT
2
ECA
NOTICE
After tightening the bolts, make sure that
the oil pump turns smoothly.
2. Install:
• Collar "1"
• Balancer weight gear "2"
TIP
Install the balancer weight gear and balancer
shaft with their lower splines "a" aligning with
each other.
1
2
3. Install:
• Balancer drive gear "1"
• Collar "2"
TIP
• Align the punched mark "a" on the balancer
drive gear with the punched mark "b" on the
balancer weight gear.
• Install the balancer drive gear and crankshaft
with the lower splines "c" aligning with each
other.
OIL PUMP AND BALANCER GEAR
1
1
4. 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 surface and
threaded portion of the primary drive gear nut.
• Place an aluminum plate "a" between the
teeth of the balancer drive gear "9" and bal-
ancer 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 the engine oil to the contact surface and
threaded portion of the balancer nut.
6-60
2
New
Balancer weight gear nut
50 Nm (5.0 m·kgf, 36 ft·lbf)
New
Primary drive gear nut
75 Nm (7.5 m·kgf, 54 ft·lbf)
New
Balancer nut
38 Nm (3.8 m·kgf, 27 ft·lbf)