2021 YAMAHA NMAX 155 stop start

Instrument and control functions
6-2
6 
Do not remove or alter the O2 sen-
sor, air induction system, or ex-
haust parts (catalysts or EXUP,
etc.).
 Maintain V-belt and drive belt (if
equipped) properly.
 Maintain correct tire pressure.
 Do not operate the vehicle in an
extreme manner. For example, re-
peated or excessive opening and
closing of the throttle, racing,
burnouts, wheelies, etc.
EAU88890
ABS warnin g li ght “ ”
This warning light comes on when the
vehicle is first turned on, and goes off
after starting riding. If the warning light
comes on while riding, the anti-lock
brake system may not work correctly.
WARNING
EWA16043
If the ABS warnin g lig ht does not
turn off after reachin g 10 km/h (6
mi/h), or if the warnin g li ght comes
on while ri din g:
 Use extra caution to avoi d pos-
si ble wheel lock d uring emer-
g ency brakin g. 
Have a Yamaha dealer check
the vehicle as soon as possib le.
TIPThe ABS warning light may come on
while revving the engine with the vehi-
cle on its centerstand, but this does
not indicate a malfunction.
EAU88930
Traction control system indicator
li g ht “ ”
This indicator light will flash when trac-
tion control has engaged.
If the traction control system is turned
off, this indicator light will come on.
(See page 6-13.)TIPWhen the vehicle is turned on, the light
should 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 vehicle.
EAUN2770
Smart key system in dicator
li g ht “ ”
This indicator light communicates the
status of the smart key system. When
the smart key system is operating nor-
mally, this indicator light will be off. If
there is an error in the smart key sys-
tem, the indicator light will flash. The
indicator light will also flash when com-
munication between the vehicle and
smart key takes place and when cer-
tain smart key system operations are
carried out.
EAUN2830
Stop an d Start System in dicator
li g ht “ ”
This indicator light comes on when the
Stop and Start System activates. The
indicator light will flash when the en-
gine is automatically stopped by the
Stop and Start System.TIPEven if the Stop and Start Switch is set
to Ž, this indicator light may not
come on. (See page 4-1.)
A
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Instrument and control functions
6-5
6
EAUN2920
Clock
The clock uses a 12-hour time system.
To set the clock1. Push the “MENU” switch until the
hour digits start flashing.
2. Use the “MENU” switch to set the hours.
3. Push the “MENU” switch until the minute digits start flashing.
4. Use the “MENU” switch to set the minutes.
5. Push the “MENU” switch until the minute digits stop flashing. The
setting is confirmed.
TIPWhen CCU and smartphone is con-
nected after vehicle power on, the
clock is automatically adjusted.
EAU86860
Coolant temperature meter
This meter shows the temperature of
the coolant, and thereby the condition
of the engine. The segments come on
from “C” (cold) to “H” (hot) as the en-
gine temperature increases. If the hot
segment flashes, stop the engine as
soon as possible, and let the engine
cool. (See page 9-37.)
TIPIf a problem is detected in the electrical
circuit, all segments will flash repeat-
edly. Have a Yamaha dealer check the
vehicle.
EAU86870
VVA in dicator
This model is equipped with variable
valve actuation (VVA) for good fuel
economy and acceleration in both the
low-speed and high-speed ranges.
The VVA indicator comes on when the
variable valve actuation system has
switched to the high-speed range.
To turn the VVA indicator on or off1. Turn the vehicle off.
1. Clock
1
1. Coolant temperature meter
1
1. VVA (variable valve actuation) indicator
1
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Instrument and control functions
6-10
6
EAU1234R
Han dle bar switchesLeft Ri
ght
EAU89570
Dimmer switch “ / ”
Set this switch to “ ” for the high
beam and to “ ” for the low beam.TIPWhen the switch is set to low beam,
both upper headlights come on.
When the switch is set to high beam,
both lower headlights also come on.
EAU12461
Turn si gnal switch “ / ”
To signal a right-hand turn, push this
switch to “ ”. To signal a left-hand
turn, push this switch to “ ”. When released, the switch returns to the cen-
ter position. To cancel the turn signal
lights, push the switch in after it has re-
turned to the center position.
EAU12501
Horn switch “ ”
Press this switch to sound the horn.
EAU12722
Start switch “ ”
With the sidestand up, push this switch
while applying the front or rear brake to
crank the engine with the starter. See
page 8-2 for starting instructions prior
to starting the engine.
EAU79500
Hazar
d switch “ ”
With the main switch in the “ON” posi-
tion, use this switch to turn on the haz-
ard lights (simultaneous flashing of all
turn signal lights).
The hazard lights are used in case of an
emergency or to warn other drivers
when your vehicle is stopped where it
might be a traffic hazard.
1. “MENU” switch
2. Dimmer switch “ / ”
3. Turn signal switch “ / ”
4. Horn switch “ ”
1
34
2
1. Stop and Start System switch / Ž
2. Hazard lights switch Ž
3. Start switch Ž
AA
1
2
3
A
A
/
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Instrument and control functions
6-11
6
NOTICE
ECA10062
Do not use the hazar d lig hts for an
exten ded len gth of time with the en-
g ine not running , otherwise the bat-
tery may d ischarge.
EAU59011
Menu switch “MENU”
This switch is used to perform selec-
tions in the setting mode display of the
multi-function meter unit.
See Multi-function meter unit on page
6-3 for detailed information.
EAU76391
Stop an d Start System
switch “ / ”
To turn on the Stop and Start System,
set the switch to “ ”. To turn off the
Stop and Start System, set this switch
to “ ”.
EAU12902
Front brake leverThe front brake lever is located on the
right side of the handlebar. To apply
the front brake, pull this lever toward
the throttle grip.
EAU12952
Rear brake leverThe rear brake lever is located on the
left side of the handlebar. To apply the
rear brake, pull this lever toward the
handlebar grip.
A
A
A
A
1. Front brake lever
1
1. Rear brake lever1
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Operation and important ri din g points
8-4
8
EAUW4891
Parkin g When parking, turn off the Stop and
Start System and then stop the engine.
After turning off the main switch, be
sure to turn off the smart key and take
it with you.
WARNING
EWA18840
 Since the en gine an d exhaust
system can b ecome very hot,
park in a place where pe destri-
ans or chil dren are not likely to
touch them an d 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
flamma ble materials which
mi ght catch fire.
 If the Stop an d Start System is
left turne d on, the b attery could
b ecome dischar ged an d it may
not be possi ble to restart the
en gine due to insufficient b at-
tery volta ge.
TIPEven when the vehicle is parked in a lo-
cation partitioned by a fence or the
glass window of a shop, if the smart
key is within operating range, other
people will be able to start the engine
and operate the vehicle. Please turn
the smart key off when leaving the ve-
hicle. (See page 3-8.)
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Periodic maintenance an d a djustment
9-13
9 8. Start the engine, and then let it idle
for several minutes while checking
it for oil leakage. If oil is leaking,
immediately turn the engine off
and check for the cause.
9. Turn the engine off, and then check the oil level and correct it if
necessary.
10. Reset the oil change tripmeter and oil change indicator “OIL”. (See
page 6-8 for reset procedures.)
EAU85450
Why Yamalu beYAMALUBE oil is a Genuine YAMAHA
Part born of the engineers’ passion
and belief that engine oil is an impor-
tant liquid engine component. We form
teams of specialists in the fields of me-
chanical engineering, chemistry, elec-
tronics and track testing, and have
them develop the engine together with
the oil it will use. Yamalube oils take full
advantage of the base oil’s qualities
and blend in the ideal balance of addi-
tives to make sure the final oil clears
our performance standards. Thus,
Yamalube mineral, semisynthetic and synthetic oils have their own distinct
characters and value. Yamaha’s expe-
rience gained over many years of re-
search and development into oil since
the 1960’s helps make Yamalube the
best choice for your Yamaha engine.
EAU67822
Final transmission oilThe final transmission case must be
checked for oil leakage before each
ride. If any leakage is found, have a
Yamaha dealer check and repair your motorcycle. In addition, the final trans-
mission oil must be changed as follows
at the intervals specified in the periodic
maintenance and lubrication chart. 1. Start the engine and warm up the final transmission oil by riding the
motorcycle for several minutes.
2. Stop the engine and then place the motorcycle on the center-
stand.
3. Place an oil pan under the final transmission case to collect the
used oil.
4. Remove the final transmission oil filler cap and its O-ring from the fi-
nal transmission case.
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Periodic maintenance an d a djustment
9-34
9
If the smart key system does not work
after checking the above items, have a
Yamaha dealer check the smart key system.
TIPSee Emergency mode on page 9-38
for information on starting the engine
without the smart key.
EAU76843
Stop an d Start System trou ble-
shootin g
If a problem occurs, check the follow-
ing before taking the vehicle to a
Yamaha dealer.
The Stop an d Start System in dicator
lig ht does not come on.
1. Is the main switch turned on?
2. Is the Stop and Start System switch set to “ ”?
3. Was the engine warmed up suffi- ciently after starting?
4. After the engine was warmed up, was the engine left idling for a cer-
tain period of time?
5. Did the vehicle travel at a speed of 10 km/h or higher? Even if the preceding conditions are
met, the Stop and Start System may
not activate in order to preserve bat-
tery power. In this case, continue to
drive the vehicle.
In addition, the Stop and Start System
indicator light does not come on if the
engine trouble warning light is on.
If the Stop and Start System indicator
light still does not come on after you
checked the preceding conditions,
have a Yamaha dealer check the vehi-
cle as soon as possible.
The Stop an
d Start System in dicator
li g ht comes on, b ut the engine does
not stop automatically. 1. Was the vehicle stopped com- pletely?
The engine may not stop automat-
ically until the vehicle is stopped
for a certain period of time. Try
bringing the vehicle to a complete
stop.
2. Is the throttle grip turned? The engine does not stop auto-
matically if the throttle grip is not in
the fully closed position. Turn the throttle grip to the fully
closed position.
If the engine still does not stop auto-
matically after you checked the pre-
ceding conditions, have a Yamaha
dealer check the vehicle as soon as
possible.
After the eng ine was stopped b y the
Stop an d Start System, the en gine
d oes not restart even if the throttle
g rip is turne d.
1. Is the Stop and Start System switch set to “ ”?
If the Stop and Start System
switch is set to “ ” while the Stop
and Start System is activated, the
Stop and Start System will be
turned off.
2. Was the sidestand operated? When the sidestand is lowered,
the Stop and Start System is de-
activated.
3. Was the engine left stopped by the Stop and Start System for a
long period of time?
A
AA
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Periodic maintenance an d a djustment
9-35
9 If the engine is left stopped by the
Stop and Start System for a long
period of time, the battery could
become discharged.
If the engine still does not restart after
you checked the preceding conditions,
have a Yamaha dealer check the vehi-
cle as soon as possible.
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