Yamaha WR450F(W) Owner's Service Manual page 210

COOLANT REPLACEMENT
CAUTION:
Take care so that coolant does not splash
on painted surfaces. If it splashes, wash it
away with water.
1. Place a container under the engine.
2. Remove:
• Seat
• Left side cover
3. Remove the catch tank hose from the catch
tank and drain the tank of its coolant.
4. Remove:
• Coolant drain bolt 1
5. Remove:
• Radiator cap
Drain the coolant completely.
6. Clean:
• Cooling system
Thoroughly flush the cooling system with
clean tap water.
7. Install:
• Copper washer
• Coolant drain bolt
3 - 6
INSP
ADJ
New
10 Nm (1.0 m · kg, 7.2 ft · lb)