Yamaha DT125R Owner's Manual page 51

PERIODIC MAINTENANCE AND MINOR REPAIR
4. If the coolant is at or below the
minimum level mark, open the
reservoir cap, add coolant to the
maximum level mark, and then
close the reservoir cap.
Coolant reservoir capacity:
0.35 L
6
cC
8 If coolant is not available, use
distilled water or soft tap water
instead. Do not use hard water
or salt water since it is harmful
to the engine.
8 If water has been used instead
of coolant, replace it with
coolant as soon as possible,
otherwise the engine may not
be sufficiently cooled and the
cooling system will not be pro-
tected against frost and corro-
sion.
8 If water has been added to the
coolant, have a Yamaha dealer
check the antifreeze content of
the coolant as soon as possi-
ble, otherwise the effective-
ness of the coolant will be
reduced.
6-13
EC000080
w
Never attempt to remove the radia-
tor cap when the engine is hot.
5. Install the panel.
NOTE:
If the engine overheats, see page
6-45 for further instructions.
EW000067