Yamaha YZ125X1 Owner's Service Manual page 92

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):
64Nm (6.4 m•kg, 46
ft•lb)
• Engine mounting bolt (front) "4"
Engine mounting bolt
(front):
64 Nm (6.4 m•kg, 46
ft•lb)
• Engine bracket "5"
• Bolt (engine bracket) "6"
Bolt (engine bracket):
34 Nm (3.4 m•kg, 24
ft•lb)
• Engine mounting bolt (upper) "7"
Engine mounting bolt
(upper):
34 Nm (3.4 m•kg, 24
ft•lb)
Apply the molybdenum disulfide
grease on the pivot shaft.
INSTALLING THE BRAKE PEDAL
1. Install:
4-37
ENGINE REMOVAL
• 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)
Tighten the nut while applying the
rear brake.
3. Bend the lock washer tab to lock
the nut.
4. Install:
• Drive chain sprocket guide "1"
• Drive chain sprocket cover "2"