2018 YAMAHA NMAX 125 ignition

Table of contents
Safety 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
Instrument an d control functions ....3-1
Main switch/steering lock ...............3-1
Keyhole shutter ...............................3-2
Indicator lights and warning lights ............................................3-3
Multi-function meter unit .................3-4
Handlebar switches.........................3-9
Front brake lever ...........................3-10
Rear brake lever ............................3-11
ABS ...............................................3-11
Fuel tank cap.................................3-12
Fuel................................................3-13
Fuel tank overflow hose ................3-15
Catalytic converter ........................3-15
Seat ...............................................3-16
Storage compartments .................3-16
Sidestand ......................................3-17
Ignition circuit cut-off system........3-18
For your safety – pre-operation
checks ...............................................4-1
Operation an d important ri din g
points .................................................5-1
Starting the engine ..........................5-1
Starting off.......................................5-2
Acceleration and deceleration.........5-3
Braking ............................................5-3
Tips for reducing fuel consumption ................................5-4
Engine break-in ...............................5-4
Parking ............................................5-5
Perio dic maintenance an d
a d justment ........................................6-1
Owner’s tool kit ...............................6-2
Periodic maintenance chart for the emission control system ........6-3 General maintenance and
lubrication chart........................... 6-4
Removing and installing panels ...... 6-7
Checking the spark plug ................. 6-9
Engine oil and oil strainer.............. 6-10
Final transmission oil .................... 6-12
Coolant ......................................... 6-13
Air filter and V-belt case air filter elements ............................ 6-17
Checking the throttle grip free play ..................................... 6-19
Valve clearance ............................. 6-20
Tires .............................................. 6-20
Cast wheels .................................. 6-22
Checking the front and rear brake lever free play .................. 6-23
Checking the front and rear
brake pads................................. 6-24
Checking the brake fluid level....... 6-25
Changing the brake fluid............... 6-26
Checking the V-belt ...................... 6-26
Checking and lubricating the cables ........................................ 6-27
Checking and lubricating the throttle grip and cable ............... 6-27
Lubricating the front and rear
brake levers ............................... 6-28
Checking and lubricating the centerstand and sidestand ........ 6-28
Checking the front fork ................. 6-29
Checking the steering ................... 6-29
Checking the wheel bearings ....... 6-30
Battery .......................................... 6-30
Replacing the fuses ...................... 6-32
Headlight....................................... 6-33
Replacing an auxiliary light bulb ... 6-34
Brake light ..................................... 6-35
Replacing the taillight bulb ........... 6-35
Replacing a front turn signal light bulb .................................... 6-37
Replacing a rear turn signal
light bulb .................................... 6-38
Troubleshooting ............................ 6-39
Troubleshooting charts ................. 6-40
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Instrument and control functions
3-1
3
EAUN0264
Main switch/steerin g lock
The main switch/steering lock controls
the ignition and lighting systems, and is
used to lock the steering. The various
main switch positions are described
below.
TIP
The main switch/steering lock is
equipped with a keyhole shutter. (See
page 3-2 for keyhole shutter opening
and closing procedures.)
EAU60600ON
All electrical circuits are supplied with
power; the meter lighting, taillight and
auxiliary lights come on, and the en-
gine can be started. The key cannot be
removed.
TIP
The headlight comes on automatically
when the engine is started and stays
on until the key is turned to “OFF”,
even if the engine stalls.
EAU10662OFF
All electrical systems are off. The key
can be removed.
WARNING
EWA10062
Never turn the key to “OFF” or
“LOCK” while the vehicle is movin g.
Otherwise the electrical systems will
b e switche d off, which may result in
loss of control or an acci dent.
EAU1068BLOCK
The steering is locked and all electrical
systems are off. The key can be re-
moved.
To lock the steering
1. Turn the handlebars all the way to
the left.
2. With the key in the “OFF” position, push the key in and turn it to
“LOCK”.
3. Remove the key.
TIP
If the steering will not lock, try turning
the handlebars back to the right slight-
ly.
ON
OFF
LOCK
1. Push.
2. Turn.
12
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Instrument and control functions
3-13
3
TIP
The fuel tank cap cannot be installed
unless the key is in the lock. In addi-
tion, the key cannot be removed if the
cap is not properly installed and
locked.
WARNING
EWA10132
Make sure that the fuel tank cap is
properly installe d before ri din g.
Leakin g fuel is a fire hazar d.
EAU13213
Fuel
Make sure there is sufficient gasoline in
the tank.
WARNING
EWA10882
Gasoline an d gasoline vapors are
extremely flamma ble. To avoi d fires
an d explosions an d to re duce the
risk of injury when refuelin g, follow
these instructions.
1. Before refueling, turn off the en- gine and be sure that no one is sit-
ting on the vehicle. Never refuel
while smoking, or while in the vi-
cinity of sparks, open flames, or
other sources of ignition such as
the pilot lights of water heaters
and clothes dryers.
2. Do not overfill the fuel tank. Stop filling when the fuel reaches the
bottom of the filler tube. Because
fuel expands when it heats up,
heat from the engine or the sun
can cause fuel to spill out of the
fuel tank.
3. Wipe up any spilled fuel immedi- ately. NOTICE: Immediately
wipe off spille d fuel with a clean,
1. Fuel tank filler tube
2. Maximum fuel level
2 1
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Instrument and control functions
3-17
3
WARNING
EWAT1052
 Do not exceed the load limit of 5
k g (11 l b) for the rear stora ge
compartment.
 Do not excee d the maximum
loa d of 168 k g (370 l b) for the ve-
hicle.
NOTICE
ECA21150
Keep the followin g points in min d
when usin g the stora ge compart-
ment.  Since the storag e compartment
accumulates heat when ex-
posed to the sun an d/or the en-
g ine heat, do not store anythin g
suscepti ble to heat, consum-
a b les or flammab le items inside
it.
 To avoi d humi dity from sprea d-
in g throu gh the stora ge com-
partment, wrap wet articles in a
plastic bag b efore storin g them
in the compartment.
 Since the storag e compartment
may get wet while the vehicle is
b ein g washe d, wrap any articles
store d in the compartment in a
plastic bag .
 Do not keep anythin g valua ble
or breakab le in the stora ge
compartment.
TIP
Do not leave your vehicle unattended
with the seat open.
EAU15306
Si destan d
The sidestand is located on the left
side of the frame. Raise the sidestand
or lower it with your foot while holding
the vehicle upright.
TIP
The built-in sidestand switch is part of
the ignition circuit cut-off system,
which cuts the ignition in certain situa-
tions. (See the following section for an
explanation of the ignition circuit cut-
off system.)
WARNING
EWA10242
The vehicle must not be ri dden with
the si destan d d own, or if the si de-
stan d cannot b e properly move d up
(or does not stay up), otherwise the
si destan d coul d contact the groun d
an d d istract the operator, resultin g
in a possi ble loss of control.
Yamaha’s i gnition circuit cut-off
system has been desi gne d to assist
the operator in fulfillin g the respon-
si bility of raisin g the si destan d b e-
fore startin g off. Therefore, check
this system re gularly an d have a
Yamaha dealer repair it if it does not
function properly.
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For your safety – pre-operation checks
4-2
4
Control cables • Make sure that operation is smooth.
• Lubricate if necessary. 6-27
Wheels an d tires •Check for damage.
• Check tire condition and tread depth.
• Check air pressure.
• Correct if necessary. 6-20,
6-22
Brake levers • Make sure that operation is smooth.
• Lubricate lever pivoting points if necessary.
6-28
Centerstan d, si de-
stan d • Make sure that operation is smooth.
• Lubricate pivots if necessary.
6-28
Chassis fasteners • Make sure that all nuts, bolts and screws are properly
tightened.
• Tighten if necessary. —
Instruments, li ghts,
si gnals an d switches • Check operation.
• Correct if necessary.
—
Si destan d switch • Check operation of ignition circuit cut-off system.
• If system is not working correctly, have Yamaha dealer
check vehicle. 3-17
ITEM CHECKS PAGE
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Operation and important rid ing points
5-1
5
EAU15952
Read the Owner’s Manual carefully to
become familiar with all controls. If
there is a control or function you do not
understand, ask your Yamaha dealer.
WARNING
EWA10272
Failure to familiarize yourself with
the controls can lea d to loss of con-
trol, which coul d cause an acci dent
or injury.
EAU66721
Startin g the eng ine
NOTICE
ECA10251
See pag e 5-4 for en gine break-in in-
structions prior to operatin g the ve-
hicle for the first time.
In order for the ignition circuit cut-off
system to enable starting, the side-
stand must be up. See page 3-18 for more information. 1. Turn the main switch on. The engine trouble warning
light and the coolant temper-
ature warning light should
come on for a few seconds,
then go off.
 The ABS warning light should
come on and stay on until the
vehicle reaches a traveling
speed of 10 km/h (6 mi/h).
NOTICE
ECA15486
If a warnin g li ght does not come on
initially when the main switch is
turne d on, or if a warnin g li ght re-
mains on, see pa ge 3-3 for the corre-
spon din g warnin g li ght circuit
check.
2. Close the throttle completely.
3. While applying the front or rear brake, push the start switch.
If the engine does not start, re-
lease the start switch, wait a few
seconds, and then try again. Each
starting attempt should be as
short as possible to preserve the
battery. Do not crank the engine
more than 10 seconds on any one
attempt.
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Periodic maintenance an d a djustment
6-39
6
10. Close the seat.
EAU25883
Trou
bleshootin g
Although Yamaha scooters 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 scooter re-
quire any repair, take it to a Yamaha
dealer, whose skilled technicians have
the necessary tools, experience, and
know-how to service the scooter 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, do
not smoke, an d make sure there are
no open flames or sparks in the ar-
ea, inclu din g pilot li ghts from water
heaters or furnaces. Gasoline or
g asoline vapors can i gnite or ex-
plo de, causin g severe injury or prop-
erty damag e.
Tightening torque:
Grab bar bolt: 17 N·m (1.7 kgf·m, 12 lb·ft)
UBV3E0E0.book Page 39 Monday, September 26, 2016 3:42 PM

Periodic maintenance an d a djustment
6-40
6
EAU68020
Trou bleshootin g charts
Startin g pro blems or poor en gine performance
1. FuelThere is enough fuel.
There is no fuel.
Check the battery.
Supply fuel.
The engine turns over
quickly.
The engine turns over
slowly.
Operate the electric
starter.
The engine does not
start.
Check the battery.
Wipe off with a dry
cloth and correct the
spark plug gap, or
replace the spark
plug.
Check the battery
lead connections,
and have a Yamaha
dealer charge the
battery if necessary.
2. BatteryThe battery is good.
The engine does not
start.
Check the ignition.
3. IgnitionWet
Dry
There is compression.
There is no
compression.
The engine does not start.
Have a Yamaha dealer check the vehicle.
Have a Yamaha dealer check the vehicle.
The engine does not
start.
Check the
compression.Have a Yamaha
dealer check the
vehicle.
Remove the spark
plug and check
the electrodes.
Operate the electric
starter.
Operate the electric
starter.
Check the fuel level
in the fuel tank.
4. Compression
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