2020 YAMAHA YZF-R6 engine overheat

Instrument and control functions
4-6
4
on, or if the light remains on after con-
firming that the oil level is correct (see
page 7-15), have a Yamaha dealer
check the vehicle.
EAU11369
Fuel level warnin
g li ght “ ”
This warning light comes on when you
are low on fuel. When the fuel level
drops below approximately 3.4 L (0.90
US gal, 0.75 Imp.gal), the light will
come on to remind you to refuel as
soon as possible.
When the vehicle is turned on, the light
will perform a circuit check (come on
for a few seconds and then go off).
If the warning light does not come on
during the circuit check, or if the warn-
ing light remains on after refueling,
have a Yamaha dealer check the vehi-
cle.TIPIf a malfunction is detected, the fuel
level warning light will flash repeatedly.
Have a Yamaha dealer check the vehi-
cle.
EAU72931
Coolant temperature warnin g
li g ht “ ”
This warning light comes on if the en-
gine overheats. If this occurs, reduce
the load on the engine immediately. If
message “HI” flashes in the coolant
temperature display, stop the vehicle,
then stop the engine and let the engine
cool.
The electrical circuit of the warning
light can be checked by turning the ve-
hicle on. The warning light should
come on for a few seconds, and then
go off.
If the warning light does not come on
initially when the vehicle is turned on,
or if the warning light remains on, have
a Yamaha dealer check the electrical
circuit.NOTICE
ECA10022
Do not continue to operate the en-
g ine if it is overheatin g.
TIP For radiator-fan-equipped vehi-
cles, the radiator fan(s) automati-
cally switch on or off according to
the coolant temperature in the ra-
diator.
 If the engine overheats, see page
7-42 for further instructions.
EAU73172
Engine trou ble warnin g li ght “ ”
This warning light comes on if a prob-
lem is detected in the engine or other
vehicle control system. If this occurs,
have a Yamaha dealer check the on-
board diagnostic system.TIPWhen the vehicle is turned on, the light
will come on for a few seconds and
then go off. If the light does not come
on, or if the light remains on, have a
Yamaha dealer check the vehicle.
UBN6E2E0.book Page 6 Friday, December 7, 2018 2:56 PM

Operation and important ri din g points
6-4
6
EAU16842
En gine break-inThere is never a more important period
in the life of your engine than the period
between 0 and 1600 km (1000 mi). For
this reason, you should read the fol-
lowing material carefully.
Since the engine is brand new, do not
put an excessive load on it for the first
1600 km (1000 mi). The various parts in
the engine wear and polish themselves
to the correct operating clearances.
During this period, prolonged full-throt-
tle operation or any condition that
might result in engine overheating
must be avoided.
EAU17085
0–1000 km (0–600 mi)
Avoid prolonged operation above 8300
r/min. NOTICE: After 1000 km (600
mi) of operation, the en gine oil must
b e chan ged an d the oil filter car-
tri dge or element replace d.
[ECA10303]
1000–1600 km (600–1000 mi)
Avoid prolonged operation above 9900
r/min. 1600 km (1000 mi) an
d b eyon d
The vehicle can now be operated nor-
mally.
NOTICE
ECA10311
 Keep the en gine spee d out of
the tachometer re d zone.
 If any en gine trou ble shoul d oc-
cur durin g the en gine break-in
period , imme diately have a
Yamaha dealer check the vehi-
cle.TIPDuring and after the engine break-in
period, the exhaust heat may cause
discoloration of the exhaust pipe, but
this is normal.
EAU17214
Parkin gWhen parking, stop the engine, and
then remove the key from the main
switch.
WARNING
EWA10312
Since the en gine an d exhaust
system can become very hot,
park in a place where pe destri-
ans or chil dren are not likely to
touch them and b e burne d.
 Do not park on a slope or on soft
groun d, otherwise the vehicle
may overturn, increasin g the
risk of a fuel leak an d fire.
 Do not park near grass or other
flammab le materials which
mi ght catch fire.
UBN6E2E0.book Page 4 Friday, December 7, 2018 2:56 PM

Periodic maintenance an d a djustment
7-42
7
EAU86420
En gine overheatin g
WARNING
EWAT1041
Do not remove the ra diator cap when the en gine an d ra diator are hot. Scal din g hot flui d an d steam may be
b lown out un der pressure, which coul d cause serious injury. Be sure to wait until the en gine has coole d.
 Place a thick ra g, like a towel, over the ra diator cap, an d then slowly rotate the cap counterclockwise to the
d etent to allow any resi dual pressure to escape. When the hissin g soun d has stoppe d, press down on the cap
while turnin g it counterclockwise, an d then remove the cap.TIPIf 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.
Wait until the
engine has cooled.
Check the coolant level in the
reservoir and radiator.
The coolant level
is OK.The coolant level is low.
Check the cooling system
for leakage.
Have a Yamaha dealer checkand repair the cooling system.Add coolant. (See TIP.)
Start the engine. If the engine overheats again,
have a
Yamaha dealer check
and repair the cooling system.
There is
leakage.
There is
no leakage.
UBN6E2E0.book Page 42 Friday, December 7, 2018 2:56 PM

11-1
11
Index
AABS....................................................... 4-18
ABS warning light ................................... 4-7
Air filter element.................................... 7-20
Auxiliary DC connector ......................... 4-29BBattery .................................................. 7-35
Brake and clutch levers, checking and
lubricating........................................... 7-32
Brake and shift pedals, checking and lubricating........................................... 7-32
Brake fluid, changing............................ 7-28
Brake fluid level, checking.................... 7-27
Brake lever............................................ 4-17
Brake lever free play, checking ............ 7-25
Brake light switches ............................. 7-26
Brake pedal .......................................... 4-17CCables, checking and lubricating ......... 7-31
Canister ................................................ 7-14
Care ........................................................ 8-1
Catalytic converter ............................... 4-22
Clutch lever........................................... 4-16
Clutch lever free play, adjusting ........... 7-24
Coolant ................................................. 7-19
Coolant temperature warning light ......... 4-6
Cowlings and panels, removing and installing ............................................... 7-9DData recording, vehicle......................... 10-2
Diagnostic connector ........................... 10-2
Dimmer switch........................................ 4-4
D-mode (drive mode).............................. 3-1
Drive chain, cleaning and lubricating ... 7-30 Drive chain slack .................................. 7-29
Drive mode switch ................................. 4-5
EEngine break-in ...................................... 6-4
Engine idling speed, checking ............. 7-20
Engine oil and oil filter cartridge........... 7-15
Engine overheating .............................. 7-42
Engine serial number ........................... 10-1
Engine trouble warning light .................. 4-6
EXUP system ....................................... 4-28FFront and rear brake pads, checking ... 7-26
Front fork, adjusting ............................. 4-24
Front fork, checking ............................. 7-34
Fuel ...................................................... 4-19
Fuel consumption, tips for reducing ...... 6-3
Fuel level warning light........................... 4-6
Fuel tank cap........................................ 4-19
Fuel tank overflow hose ....................... 4-21
Fuses, replacing ................................... 7-36HHandlebar switches ............................... 4-3
Hazard switch ........................................ 4-4
High beam indicator light ....................... 4-5
Horn switch ............................................ 4-4IIdentification numbers ......................... 10-1
Ignition circuit cut-off system .............. 4-30
Immobilizer system ................................ 4-1
Immobilizer system indicator light ......... 4-7
Indicator lights and warning lights ......... 4-5LLicense plate light bulb, replacing ....... 7-38
MMain switch/steering lock ....................... 4-2
Maintenance and lubrication, periodic ... 7-5
Maintenance, emission control
system .................................................. 7-3
Matte color, caution................................ 8-1
Model label ........................................... 10-1
Multi-function meter unit ........................ 4-8NNeutral indicator light ............................. 4-5OOil level warning light .............................. 4-5PParking.................................................... 6-4
Part locations.......................................... 2-1
Pass switch............................................. 4-4QQuick shift system .................................. 3-4RRear view mirrors .................................. 4-23SSafety information................................... 1-1
Seats ..................................................... 4-22
Shifting.................................................... 6-2
Shift light ................................................. 4-7
Shift pedal............................................. 4-17
Shock absorber assembly, adjusting ... 4-26
Sidestand.............................................. 4-29
Sidestand, checking and lubricating .... 7-33
Spark plugs, checking .......................... 7-13
Special features ...................................... 3-1
Specifications ......................................... 9-1
Starting the engine ................................. 6-1
Steering, checking ................................ 7-34
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