Yamaha YZ125 2019 Owner's Service Manual page 140

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 diameter into the other side of
the swingarm to support it.
ENGINE REMOVAL
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"
• Nut (pivot shaft) "3"
Nut (pivot shaft):
85 Nm (8.5 m•kg, 61 ft•lb)
• Engine mounting bolt (lower) "4"
• Nut [engine mounting bolt (lower)] "5"
Nut [engine mounting bolt (lower)]:
64Nm (6.4 m•kg, 46 ft•lb)
• Engine mounting bolt (front) "6"
• Nut [engine mounting bolt (front)] "7"
Nut [engine mounting bolt (front)]:
64 Nm (6.4 m•kg, 46 ft•lb)
• Engine bracket "8"
• Bolt (engine bracket) "9"
• Nut (engine bracket) "10"
Nut (engine bracket):
34 Nm (3.4 m•kg, 24 ft•lb)
• Engine mounting bolt (upper) "11"
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