Yamaha ULTRAMATIC KODIAK 400 YFM400FAR Owner's Manual page 310

3. Remove the reservoir cap, and then add
coolant or distilled water to raise it to the
specified level.
4. Install the panel.
Coolant reservoir capacity:
0.25 L
CAUTION:
_
Hard water or salt water is harmful to the en-
gine. You may use soft water if you can't get
distilled water.
_
NOTE:
_
G
If water is added, have a Yamaha dealer
check the antifreeze content of the coolant as
soon as possible.
G
The radiator fan operation is completely auto-
matic. It is switched on or off according to the
coolant temperature in the radiator.
_
If your ATV overheats, see page 8-132 for details.
8-53