Yamaha YZ250FM 2021 Owner's Service Manual page 126

3. Install:
• Left drive chain puller "1"
• Rear wheel axle "2"
TIP
• Install the left drive chain puller, and insert the
rear wheel axle from the left side.
• Apply the lithium-soap-based grease to the
rear wheel axle.
LS
4. Install:
• Right drive chain puller "1"
• Washer "2"
• Rear wheel axle nut "3"
TIP
Temporarily tighten the nut (rear wheel axle) at
this point.
2 2
3 3
5. Adjust:
• Drive chain slack "a"
Drive chain slack (Maintenance
stand)
50.0–60.0 mm (1.97–2.36 in)
1 1
2
1 1 1
Refer to "DRIVE CHAIN SLACK" on page
3-26.
6. Tighten:
• Rear wheel axle nut "1"
Wheel axle nut
135 N·m (13.5 kgf·m, 100 lb·ft)
• Locknut "2"
Locknut
21 N·m (2.1 kgf·m, 15 lb·ft)
1 1
4-12
REAR WHEEL
a a
2 2 2