2015 YAMAHA NMAX maintenance

Periodic maintenance an d a djustment
6-36
6 10. Close the seat.
EAU25882
Trou
bleshootin gAlthough 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 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.
Tightenin g torque:
Grab bar bolt:
17 Nm (1.7 m·kgf, 12 ft·lbf)
U2DSE0E0.book Page 36 Thursday, March 19, 2015 10:34 AM

Periodic maintenance an d a djustment
6-37
6
EAU42706
Trou bleshootin g chartsStartin g prob lems or poor en gine performance
Check the fuel level in
the fuel tank.1. Fuel
There is enough fuel.
There is no fuel.
Check the battery.
Supply fuel.
The engine does not start.
Check the battery.
Operate the electric starter.4. Compression
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.
Remove the spark plug
and check the electrodes.3. Ignition
Wipe off with a dry cloth and correct the
spark plug gap, or replace the spark plug. Have a Yamaha dealer check the vehicle.
The engine does not start.
Check the compression.
Operate the electric starter.2. Battery
The engine turns over
quickly.
The engine turns over
slowly.
The battery is good.
DryWet
Operate the electric starter.
Check the battery lead connections,
and have a Yamaha dealer charge
the battery if necessary.
The engine does not start.
Check the ignition.
U2DSE0E0.book Page 37 Thursday, March 19, 2015 10:34 AM

Periodic maintenance an d a djustment
6-38
6 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 d own 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.
U2DSE0E0.book Page 38 Thursday, March 19, 2015 10:34 AM

10-1
10
IndexAABS ....................................................... 3-11
ABS warning light ................................... 3-3
Acceleration and deceleration ................ 5-2
Air filter and V-belt case air filter
elements ............................................. 6-16
Auxiliary light bulb, replacing ................ 6-31BBattery .................................................. 6-28
Brake fluid, changing ............................ 6-24
Brake fluid level, checking .................... 6-22
Brake lever, front .................................. 3-10
Brake lever, rear.................................... 3-11
Brake levers, lubricating ....................... 6-25
Brake light ............................................. 6-32
Braking.................................................... 5-2CCables, checking and lubricating ......... 6-24
Care ........................................................ 7-1
Catalytic converter ................................ 3-14
Centerstand and sidestand, checking and lubricating .................... 6-26
Coolant ................................................. 6-13
Coolant temperature warning light ......... 3-3DDimmer switch ...................................... 3-10EEngine break-in....................................... 5-3
Engine oil and oil strainer...................... 6-10
Engine serial number .............................. 9-1
Engine trouble warning light ................... 3-3FFinal transmission oil ............................ 6-12 Front and rear brake lever free play,
checking............................................. 6-21
Front and rear brake pads, checking ... 6-22
Front fork, checking ............................. 6-26
Fuel ....................................................... 3-13
Fuel consumption, tips for reducing ...... 5-3
Fuel tank cap ........................................ 3-12
Fuel tank overflow hose ....................... 3-14
Fuses, replacing ................................... 6-29
HHandlebar switches .............................. 3-10
Headlight .............................................. 6-30
High beam indicator light ....................... 3-3
Horn switch .......................................... 3-10IIdentification numbers ............................ 9-1
Ignition circuit cut-off system ............... 3-17
Indicator lights and warning lights ......... 3-2KKeyhole shutter ...................................... 3-2MMain switch/steering lock....................... 3-1
Maintenance and lubrication, periodic ... 6-3
Maintenance, emission control system.................................................. 6-2
Matte color, caution ............................... 7-1
Model label ............................................. 9-1
Multi-function meter unit ........................ 3-4PPanels, removing and installing .............. 6-7
Parking ................................................... 5-4
Part locations ......................................... 2-1SSafe-riding points ................................... 1-5 Safety information ...................................1-1
Seat .......................................................3-15
Sidestand ..............................................3-17
Spark plug, checking ..............................6-8
Specifications .........................................8-1
Starting off ..............................................5-2
Starting the engine ..................................5-1
Start switch ...........................................3-10
Steering, checking ................................6-27
Storage ...................................................7-4
Storage compartments .........................3-16
TTaillight bulb, replacing .........................6-32
Throttle grip and cable,
checking and lubricating ....................6-25
Throttle grip free play, checking ...........6-18
Tires ......................................................6-19
Tool kit ....................................................6-1
Troubleshooting ....................................6-36
Troubleshooting charts .........................6-37
Turn signal indicator lights ......................3-2
Turn signal light bulb (front),
replacing .............................................6-34
Turn signal light bulb (rear), replacing .............................................6-35
Turn signal switch .................................3-10VValve clearance .....................................6-19
V-belt, checking ....................................6-24
Vehicle identification number ..................9-1WWheel bearings, checking .....................6-27
Wheels ..................................................6-21
U2DSE0E0.book Page 1 Thursday, March 19, 2015 10:34 AM