2021 YAMAHA NMAX 155 key battery

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

Smart key system
3-2
3
You are carryin g or usin g com-
munication equipment such as
ra dios or mo bile phones in
close proximity of the smart key
 The smart key is in contact with
or covere d b y a metallic o bject
 Other vehicles equippe d with a
smart key system are near by
In such situations, move the smart
key to another location an d perform
the operation ag ain. If it still does
not work, operate the vehicle in
emer gency mo de. (See pag e 9-38.)
TIPTo preserve vehicle battery power, the
smart key system turns off approxi-
mately 9 days after the vehicle was last
used (the answer-back function is dis-
abled). In this situation, simply push
the main switch knob to turn the smart
key system back on.
EAU76453
Operating ran ge of the smart
key systemThe approximate operating range of
the smart key system is shown below.
If the smart key is turned off, the vehi-
cle will not recognize the smart key
even if it is within operating range. If the
smart key battery is discharged, the smart key system may not work or its
operating range may become very
short.
TIP
Do not place the smart key in a
storage compartment.
 Always carry the smart key with
you.
 Turn the smart key off when leav-
ing the vehicle.
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Smart key system
3-3
3
EAUN2460
Handlin g of the smart key an d
mechanical keys
WARNING
EWA17952
 The smart key shoul d b e carried
with you. Do not store it on the
vehicle.
 When the smart key is within
operatin g ran ge, exercise due
care because other people not
carryin g the smart key can start
the en gine an d operate the vehi-
cle.Included with the vehicle is one smart
key, two mechanical keys, and one
identification number card. Keep one
mechanical key and the identification
number card in a safe place separate
from the vehicle.
If the vehicle battery is discharged, the
mechanical key can be used to open
the seat to charge or replace the bat-
tery. Therefore it is recommended that
you carry one mechanical key together
with the smart key.
If the smart key and the smart key sys-
tem identification number are both lost
or damaged, the entire smart key sys-
tem will need to be replaced. To pre-
vent this, it is recommended that you write
down the i dentification num-
b er in case the i dentification num ber
car d is lost.
NOTICE
ECA21573
The smart key has precision elec-
tronic components. O bserve the fol-
lowin g precautions to prevent
possi ble malfunction or damag e.
 Do not place or store the smart
key in a stora ge compartment.
The smart key may be damag ed
from roa d vi brations or exces-
sive heat.
 Do not drop, ben d, or su bject
the smart key to stron g impacts.
 Do not su bmer ge the smart key
in water or other liqui ds.
 Do not place heavy items or ex-
cessive stress on the smart key.
 Do not leave the smart key in a
place exposed to direct sun-
lig ht, hi gh temperature or hi gh
humi dity.
 Do not g rind or attempt to mo d-
ify the smart key.
1. Smart key
2. Mechanical key
1. Identification number card
A52010
221
868588
1
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Smart key system
3-4
3
Keep the smart key away from
stron g ma gnetic fiel ds an d
ma gnetic o bjects such as key
hol ders, TVs, an d computers.
 Keep the smart key away from
electric me dical equipment.
 Do not allow oils, polishin g
a g ents, fuel, or any stron g
chemicals to come in contact
with the smart key. The smart
key body may become discol-
ore d or cracked .
TIPThe smart key battery life is ap-
proximately two years, but this
may vary according to operating
conditions.
 Replace the smart key battery
when the smart key system indi-
cator light flashes for 20 seconds
when the vehicle is turned on, or
when the smart key indicator light
does not come on when the smart
key button is pushed. (See page
3-6.) After changing the smart key
battery, if the smart key system still does not operate, check the
vehicle battery and then have a
Yamaha dealer check the vehicle.
 If the smart key continually re-
ceives radio waves, the smart key
battery will discharge quickly. (For
example, when placed in the vicin-
ity of electrical products such as
televisions, radios, or computers.)
 You can register up to six smart
keys for the same vehicle. See a
Yamaha dealer regarding spare
smart keys.
 If a smart key is lost, contact a
Yamaha dealer immediately to
prevent the vehicle from being
stolen, etc.
EAU76474
Smart key
WARNING
EWA17952
The smart key shoul d b e carrie d
with you. Do not store it on the
vehicle.
 When the smart key is within
operatin g ran ge, exercise due
care because other people not
carryin g the smart key can start
the en gine an d operate the vehi-
cle.1. Smart key indicator light
2. Smart key button
1
2
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Smart key system
3-6
3
EAUN2712
Replacing the smart key bat-
teryReplace the battery in the following sit-
uations.
 The smart key system indicator
light flashes for about 20 seconds
when the power of the vehicle is
turned on.
 The answer-back function does
not operate when the smart key
button is pushed.
WARNING
EWA20630
The smart key contains a button cell
b attery.
 Keep new an d use d b atteries
away from chil dren. 
If the b attery compartment d oes
not close securely, stop usin g
the smart key an d keep it away
from chil dren.
Explosion Hazar d - d o not mishan-
d le the battery.
 Dan ger of explosion if battery is
incorrectly replace d.
 Replace only with the same or
equivalent type.
 Do not expose smart key to ex-
cessive heat, such as sunshine
or fire.
Chemical Burn Hazar d - do not in-
g est the battery.
 If the battery is swallowed , it
can cause severe internal burns
in just 2 hours an d can lea d to
d eath.
 If you think batteries mi ght have
b een swallowed or placed in-
si de any part of the body, seek
imme diate me
dical attention.
NOTICE
ECA15785

Use a cloth when openin g the
smart key case with a screw-
d river. Direct contact with har d
o bjects may d amage or scratch
the smart key.
 Take precautions to prevent the
waterproof seal from bein g
d amag ed or contaminate d by
d irt.
 Do not touch the internal cir-
cuits an d terminals. This may
cause malfunctions.
 Do not apply excessive force to
the smart key when replacin g
the battery.
 Make sure the battery is in-
stalle d correctly. Confirm the di-
rection of the positive “+” si de
of the battery.To replace the smart key battery
1. Open the smart key case as shown.
1. Smart key system indicator light “ ”
1
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Smart key system
3-7
3
2. Remove the battery.
TIPDispose of the removed battery in ac-
cordance with local regulations.3. Install a new battery as shown. Note the polarity of the battery. 4. Gently snap the smart key case
closed.
EAUN2100
Main switchThe main switch is used to turn the ve-
hicle power on and off, lock and unlock
the steering, and open the seat. After
pushing the main switch knob (and
confirmation with the smart key has
1. Battery
1
Specified b attery:
CR2032
1. Battery
1
1. Main switch knob
1. Smart key system indicator light Ž
1
1
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Smart key system
3-8
3taken place), the main switch can be
turned while the smart key system indi-
cator light is on (approximately 4 sec-
onds).
WARNING
EWA18720
Never turn the main switch to
“OFF”, “ ”, or “OPEN” while the ve-
hicle is movin
g. Otherwise the elec-
trical systems will b e switched off,
which may result in loss of control or
an acci dent.TIPDo not push the main switch knob re-
peatedly or turn the main switch back
and forth excessively (beyond normal
use). To protect the main switch from
damage, the smart key system will
temporarily disable, and the smart key
system indicator light will flash. If this
occurs, wait until the indicator light
stops flashing, and then operate the
main switch.The main switch positions are de-
scribed below.
EAU76502
ON
All electrical circuits are supplied with
power, and the engine can be started.
To turn the vehicle power on1. Turn the smart key on and bring it
within operating range.
2. Push the main switch knob and the smart key indicator light will
come on for approximately 4 sec-
onds.
3. While the smart key system indi- cator light is on, turn the main
switch to “ON”. All of the turn sig-
nal lights will flash twice and the
vehicle power will turn on.
TIPIf the vehicle battery voltage is
low, the turn signal lights will not
flash.
 See “Emergency mode” on page
9-38 for information on turning the
vehicle power on without the
smart key.
EAU76511
OFF
All electrical systems are off.
To turn the vehicle power off1. With the smart key turned on and
within operating range, turn the
main switch to “OFF”.
1. Push.
2. Turn.1 2
1. Turn.
1
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Periodic maintenance an d a djustment
9-33
9 10. Close the seat.
EAU60701
Trou
bleshootin gAlthough Yamaha vehicles receive a
thorough inspection before shipment
from the factory, trouble may occur
during operation. Any problem in the
fuel, compression, or ignition systems,
for example, can cause poor starting
and loss of power.
The following troubleshooting charts
represent quick and easy procedures
for checking these vital systems your-
self. However, should your vehicle re-
quire any repair, take it to a Yamaha
dealer, whose skilled technicians have
the necessary tools, experience, and
know-how to service the vehicle prop-
erly.
Use only genuine Yamaha replace-
ment parts. Imitation parts may look
like Yamaha parts, but they are often
inferior, have a shorter service life and
can lead to expensive repair bills.
WARNING
EWA15142
When checkin g the fuel system, d o
not smoke, an d make sure there are
no open flames or sparks in the ar-
ea, inclu din g pilot lig hts from water heaters or furnaces. Gasoline or
g
asoline vapors can i gnite or ex-
plod e, causin g severe injury or prop-
erty damag e.
EAU76551
Smart key system trou bleshootin g
Please check the following items when
the smart key system does not work.  Is the smart key turned on? (See
page 3-4.)
 Is the smart key battery dis-
charged? (See page 3-6.)
 Is the smart key battery installed
correctly? (See page 3-6.)
 Is the smart key being used in a lo-
cation with strong radio waves or
other electromagnetic noise? (See
page 3-1.)
 Are you using the smart key that is
registered to the vehicle?
 Is the vehicle battery discharged?
When the vehicle battery is dis-
charged, the smart key system will
not operate. Please have the vehi-
cle battery charged or replaced.
(See page 9-28.)
Tightenin g torque:
Grab bar bolt:
17 N·m (1.7 kgf·m, 13 lb·ft)
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