Yamaha YZF R1 2021 Owner's Manual page 98

Periodic maintenance and adjustment
2. With the vehicle in an upright posi-
tion, look at the coolant level in the
reservoir.
FULL
1
2
1. Maximum level mark
2. Minimum level mark
3. If the coolant is at or below the
8
minimum level mark, remove
cowling B to access the coolant
reservoir. (See page 8-10.)
4. Remove the coolant reservoir cap.
WARNING! Remove only the
coolant reservoir cap. Never at-
tempt to remove the radiator
cap when the engine is hot.
[EWA15162]
LOW
1. Coolant reservoir cap
5. Add coolant to the maximum level
mark. NOTICE: 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.
If water has been used instead
of coolant, replace it with cool-
ant as soon as possible, other-
wise the cooling system will not
be protected against frost and
corrosion. If water has been
added to the coolant, have a
Yamaha dealer check the anti-
freeze content of the coolant as
soon as possible, otherwise the
effectiveness of the coolant will
be reduced.
6. Install the coolant reservoir cap.
7. Install the cowling.
1
Changing the coolant
The coolant must be changed at the in-
tervals specified in the periodic main-
tenance and lubrication chart. Have a
Yamaha dealer change the coolant.
WARNING! Never attempt to remove
the radiator cap when the engine is
hot.
[ECA10473]
8-18
[EWA10382]
EAU33032