Yamaha XMAX Owner's Manual page 98

Wait until the Check the coolant level in the
engine has cooled. reservoir and radiator.
If coolant is not available, tap water can be temporarily used instead, provided that it is changed to the recommended cool-
ant as soon as possible.
There is
leakage.
The coolant level is low.
Check the cooling system
for leakage.
There is
no leakage.
Start the engine. If the engine overheats again, have a
The coolant level
Yamaha dealer check and repair the cooling system.
is OK.
8-36
EWAT1041
Have a Yamaha dealer check
and repair the cooling system.
Add coolant. (See TIP.)