Yamaha YZ250F 2016 Owner's Service Manual page 250

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.
1
9
a
9
5
4
3
d
10
2
b 2
a
10
3
E
c
8
7
6 b
6
OIL PUMP AND BALANCER GEAR
b 5
8
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