2021 YAMAHA NMAX 155 traction control

Table of contentsSafety information ............................ 1-1
Further safe-riding points ............... 1-5
Description ....................................... 2-1
Left view ......................................... 2-1
Right view ....................................... 2-2
Controls and instruments ............... 2-3
Smart key system ........................... 3-1
Smart key system ........................... 3-1
Operating range of the smart key system .................................. 3-2
Handling of the smart key and mechanical keys ......................... 3-3
Smart key ....................................... 3-4
Replacing the smart key battery..... 3-6
Main switch .................................... 3-7
Stop an d Start System ..................... 4-1
Stop and Start System ................... 4-1
Stop and Start System operation ... 4-1
Special features .............................. 5-1
CCU (Communication Control Unit) ................................ 5-1
Instrument an d control functions ... 6-1
Indicator lights and warning lights............................................ 6-1
Multi-function meter unit ................ 6-3
Handlebar switches ...................... 6-10 Front brake lever ........................... 6-11
Rear brake lever ............................ 6-11
ABS ............................................... 6-12
Traction control system ................ 6-13
Fuel tank cap ................................ 6-14
Fuel ............................................... 6-15
Fuel tank overflow hose ................ 6-17
Catalytic converter ........................ 6-17
Seat ............................................... 6-17
Helmet holders .............................. 6-18
Storage compartments ................. 6-19
Adjusting the shock absorber
assemblies ................................. 6-20
Power outlet ................................. 6-21
Sidestand ...................................... 6-22
Ignition circuit cut-off system ....... 6-22
For your safety – pre-operation
checks ............................................... 7-1
Operation an d important ri din g
points ................................................. 8-1
Engine break-in ............................... 8-1
Starting the engine .......................... 8-2
Starting off ...................................... 8-2
Acceleration and deceleration ........ 8-3
Braking ............................................ 8-3
Tips for reducing fuel consumption ................................ 8-3
Parking ........................................... 8-4 Perio
dic maintenance an d
a d justment ........................................ 9-1
Tool kit ............................................ 9-1
Periodic maintenance chart for the emission control system ....... 9-2
General maintenance and lubrication chart .......................... 9-3
Removing and installing panels ...... 9-7
Checking the spark plug................. 9-9
Canister ........................................ 9-11
Engine oil and oil strainer ............. 9-11
Why Yamalube.............................. 9-13
Final transmission oil .................... 9-13
Coolant ......................................... 9-15
Air filter and V-belt case
air filter elements ....................... 9-16
Checking the throttle grip
free play..................................... 9-19
Valve clearance............................. 9-19
Tires .............................................. 9-19
Cast wheels .................................. 9-21
Checking the front and rear brake lever free play .................. 9-21
Checking the front and rear brake pads ................................ 9-22
Checking the brake fluid level ...... 9-23
Changing the brake fluid .............. 9-24
Checking the V-belt ...................... 9-24
Checking and lubricating the
cables ........................................ 9-25UBBDE0E0.book Page 1 Wednesday, June 2, 2021 2:57 PM

Instrument and control functions
6-1
6
EAU77123
In dicator lig hts and warning
lig hts
EAU88900
Turn si gnal in dicator li ghts “ ”
an d“”
Each indicator light will flash when its
corresponding turn signal lights are
flashing.
EAU88910
Hi gh beam in dicator li ght “ ”
This indicator light comes on when the
high beam of the headlight is switched
on.
EAU88712
Malfunction in dicator li ght
(MIL) “ ”
This light comes on or flashes 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. The electri-
cal circuit of the warning light can be
checked by turning the vehicle power
on. The light should come on for a few
seconds, and then go off. If the light
does not come on initially when the ve-
hicle power is turned on, or if the light
remains on, have a Yamaha dealer
check the vehicle.
NOTICE
ECA26820
If the MIL starts flashin g, re duce en-
g ine spee d to prevent exhaust sys-
tem damag e.TIPThe engine is sensitively monitored by
the on-board diagnostic system to de-
tect deterioration and malfunction of
the emission control system. Therefore
the MIL may come on or flash due to
vehicle modifications, lack of mainte-
nance, or excessive/improper use of
the vehicle. To prevent this, observe
these precautions.
 Do not attempt to modify the soft-
ware of the engine control unit.
 Do not add any electrical acces-
sories that interfere with engine
control.
 Do not use aftermarket accesso-
ries or parts such as suspension,
spark plugs, injectors, exhaust
system, etc.
 Do not change the drivetrain
specifications (chain, sprockets,
wheels, tires, etc.).
1. Left turn signal indicator light “ ”
2. Incoming notification indicator light “ ”
3. Traction control system indicator
light “ ”
4. ABS warning light “ ”
5. High beam indicator light “ ”
6. Malfunction indicator light “ ”
7. Stop and Start System indicator light “ ”
8. Smart key system indicator light “ ”
9. Incoming call indicator light “ ”
10.Right turn signal indicator light “ ”
4
110
5
6
7
8
23 9
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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
6-6
6 2. While pushing the “MENU”
switch, turn the vehicle on.
3. Continue pushing the “MENU” switch. The display unit setting
screen will come on (after 5 sec-
onds), and after that (an additional
10 seconds) all segments other
than the VVA indicator will start
flashing. Now release the “MENU”
switch.
4. Push the “MENU” switch once to change the on or off setting.
5. Push the “MENU” switch for 1 second to confirm the setting.
TIPTurning the VVA indicator off does not
turn off the variable valve actuation
system.
EAUN2800
Multi-function display
The multi-function display is equipped
with the following:  an odometer (ODO)
 two tripmeters (TRIP 1 and TRIP 2)
 a fuel reserve tripmeter (TRIP F)
 an oil change tripmeter (OIL TRIP)
 an oil change indicator
 a V-belt replacement tripmeter (V-
BELT TRIP)
 a V-belt replacement indicator
 an instantaneous fuel consump-
tion display (F/ECO)
 an average fuel consumption dis-
play (AVE F/ECO)
 a battery voltage display (BATT) 
a traction control system display
(TCS)
Push the “MENU” switch to change
the display in the following order:
ODO and F/ECO  TRIP 1 and AVE
F/ECO  TRIP 2 and AVE F/ECO 
TRIP F  BATT  TCS  OIL TRIP 
V-BELT TRIP  ODO and F/ECO
TIP The fuel reserve tripmeter appears
only when you are low on fuel.
 The oil change tripmeter and V-
belt replacement tripmeter are not
displayed while the vehicle is
moving.
 There is an average fuel consump-
tion display for each tripmeter
(TRIP 1 and TRIP 2). When a trip-
meter is reset, the average fuel
consumption display for that trip-
meter will also be reset.
1. Multi-function display
1
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Instrument and control functions
6-13
6
EAUN2810
Traction control systemThe traction control system (TCS)
helps maintain traction when acceler-
ating on slippery surfaces, such as un-
paved or wet roads. If sensors detect
that the rear wheel is starting to slip
(uncontrolled spinning), the traction
control system assists by regulating
engine power until traction is restored.
When traction control has engaged,
the “ ” indicator light will flash. You
may notice changes in engine re-
sponse or exhaust sound.
WARNING
EWA18860
The traction control system is not a
su bstitute for ri din g appropriately
for the con ditions. Traction control
cannot prevent loss of traction d ue
to excessive spee d when enterin g
turns, when acceleratin g har d at a
sharp lean an gle, or while b raking,
an d cannot prevent front wheel slip-
pin g. As with any vehicle, approach
surfaces that may be slippery with
caution an d avoi d especially slip-
pery surfaces.
Settin g the traction control system
When the vehicle is turned on, traction
control is automatically turned on.
To turn the traction control system off,
use the “MENU” switch to change the
multi-function display to the traction
control system display. Then push the
“MENU” switch for three seconds. The
display will show “TCS OFF”, and
the “ ” indicator light will come on.
TIPTurn the traction control system off to
help free the rear wheel if the vehicle
gets stuck in mud, sand, or other soft
surfaces.NOTICE
ECA16801
Use only the specifie d tires. (See
pa ge 9-19.) Usin g different size d
tires will prevent the traction control
system from controllin g tire rotation
accurately.
1. Traction control system indicator light “ ”
2. Traction control system display
1
2
1. Traction control system indicator light Ž
2. Traction control system display
1
2
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Instrument and control functions
6-14
6 Resetting
the traction control sys-
tem
The traction control system will auto-
matically disable under certain condi-
tions; such as when a sensor fault is
detected, or when only one wheel is al-
lowed to rotate for more than a few
seconds. Should this happen,
the “ ” indicator light will come on,
and possibly the “ ” warning light,
too.
TIPWhen the vehicle is on the centerstand,
do not rev the engine for an extended
period of time. Otherwise, the traction
control system will automatically dis-
able and need to be reset.If the traction control system automat-
ically disables, try resetting it as fol-
lows. 1. Stop the vehicle and turn it off completely.
2. Wait a few seconds and then turn the vehicle power on.
3. The Ž indicator light should turn off and the system be en-
abled.TIPIf the Ž indicator light remains on
after resetting, the vehicle may still be
ridden; however, have a Yamaha deal-
er check the vehicle as soon as possi-
ble.4. Have a Yamaha dealer check thevehicle and turn off the Ž
warning light.
EAUN2571
Fuel tank capTo open the fuel tank cap lid, turn the
main switch to “OPEN” position and
push the “FUEL” button.
To open the the fuel tank cap, turn it
counterclockwise and pull it off.
1. Traction control system indicator light “ ”
2. Engine trouble warning light “ ”
1
2
1. “FUEL” button
1. Fuel tank cap lid
2. Fuel tank cap
1
1
2
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Index
13-2
13
Speedometer .......................................... 6-4
Starting off .............................................. 8-2
Starting the engine ................................. 8-2
Start switch........................................... 6-10
Steering, checking ................................ 9-27
Stop and Start System ........................... 4-1
Stop and Start System indicator light .... 6-2
Stop and Start System operation ........... 4-1
Stop and Start System switch .............. 6-11
Stop and Start System
troubleshooting .................................. 9-34
Storage ................................................. 10-3
Storage compartments......................... 6-19TThrottle grip and cable, checking and lubricating .................... 9-25
Throttle grip free play, checking ........... 9-19
Tires ...................................................... 9-19
Tool kit .................................................... 9-1
Traction control system ........................ 6-13
Traction control system indicator light ... 6-2
Troubleshooting.................................... 9-33
Troubleshooting chart .......................... 9-36
Turn signal indicator lights ..................... 6-1
Turn signal light bulb (front), replacing............................................. 9-31
Turn signal light bulb (rear), replacing............................................. 9-32
Turn signal switch................................. 6-10VValve clearance .................................... 9-19
V-belt, checking.................................... 9-24
Vehicle identification number ............... 12-1
Vehicle lights ........................................ 9-31 VVA indicator.......................................... 6-5
WWheel bearings, checking .................... 9-28
Wheels ................................................. 9-21YYamalube ............................................. 9-13
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