Yamaha WR250F Owner's Service Manual page 148

HANDLING NOTE
Support the machine securely so
there is no danger of it falling over.
REMOVING THE DRIVE
SPROCKET
1. Remove:
• Nut (drive sprocket) "1"
• Lock washer "2"
• Straighten the lock washer tab.
• Loosen the nut while applying the
rear brake.
2. Remove:
• Drive sprocket "1"
• Drive chain "2"
Remove the drive sprocket together
with the drive chain.
REMOVING THE ENGINE
1. Remove:
• Pivot shaft "1"
If the pivot shaft is pulled all the way
out, the swingarm will come loose. If
possible, insert a shaft of similar di-
ameter into the other side of the swin-
garm to support it.
2. Remove:
• Engine "1"
From right side.
Make sure that the couplers, hoses
and cables are disconnected.
INSTALLING THE ENGINE
1. Install:
• Engine "1"
Install the engine from right side.
• Pivot shaft "2"
Pivot shaft:
85 Nm (8.5 m•kg, 61
ft•lb)
• Engine mounting bolt (lower) "3"
Engine mounting bolt
(lower):
53Nm (5.3 m•kg, 38
ft•lb)
• Lower engine bracket "4"
• Bolt (lower engine bracket) "5"
Bolt (lower engine brack-
et):
34 Nm (3.4 m•kg, 24
ft•lb)
• Patch "6"
• Engine mounting bolt (front) "7"
Engine mounting bolt
(front):
53 Nm (5.3 m•kg, 38
ft•lb)
• Upper engine bracket "8"
• Bolt (upper engine bracket) "9"
Bolt (upper engine brack-
et):
34 Nm (3.4 m•kg, 24
ft•lb)
• Engine mounting bolt (upper) "10"
Engine mounting bolt
(upper):
55 Nm (5.5 m•kg, 40
ft•lb)
• Lower engine guard "11"
• Bolt (lower engine guard) "12"
Bolt (lower engine
guard):
7 Nm (0.7 m•kg, 5.1
ft•lb)
• Apply the molybdenum disulfide
grease on the pivot shaft.
• Install the patch with the claw "a"
facing outside the chassis.
5-54
ENGINE REMOVAL
INSTALLING THE BRAKE PEDAL
1. Install:
• Spring "1"
• Brake pedal "2"
• O-ring "3"
• Bolt (brake pedal) "4"
Bolt (brake pedal):
26 Nm (2.6 m•kg, 19
ft•lb)
• Clip "5"
Apply the lithium soap base grease
on the bolt, O-rings and brake pedal
bracket.
INSTALLING THE DRIVE
SPROCKET
1. Install:
• Drive sprocket "1"
• Drive chain "2"
Install the drive sprocket together
with the drive chain.
2. Install:
• Lock washer "1"
• Nut (drive sprocket) "2"
Nut (drive sprocket):
75 Nm (7.5 m•kg, 54
ft•lb)