Yamaha Nmax 125 Manual

							
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EAU15581
FOR YOUR SAFETY - PRE-OPERATION CHECKS
EAU15581
FOR YOUR SAFETY - PRE-OPERATION CHECKS
4-1
EAU15596
Inspect your vehicle each time you use it to make sure the vehicle is in\
 safe operating condition. Always follow the inspection
and maintenance procedures and schedules described in the Owner’s Manual.
EWA11151
WARNING
Failure to inspect or maintain the vehicle properly increases the possib\
ility of an accident or equipment damage. Do
not operate the vehicle if you find any problem. If a problem cannot be \
corrected by the procedures provided in this
manual, have the vehicle inspected by a Yamaha dealer. 
						

							
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EAU15581
FOR YOUR SAFETY - PRE-OPERATION CHECKS
4-2
ITEM CHECKS PAGE
Fuel • Check fuel level in fuel tank.
• Refuel if necessary.
• Check fuel line for leakage. 3-5, 3-6
Engine oil • Check oil level in engine.
• If necessary, add recommended oil to specified level.
• Check vehicle for oil leakage. 6-10
Final transmission oil • Check vehicle for oil leakage. 6-12
Front brake • Check operation.
• If soft or spongy, have Yamaha dealer bleed hydraulic system.
• Check brake pads for wear.
• Replace if necessary.
• Check fluid level in reservoir.
• If necessary, add recommended brake fluid to specified level.
• Check hydraulic system for leakage. 6-18 - 6-21
Rear brake • Check operation.
• Lubricate cable if necessary.
• Check lever free play.
• Adjust if necessary. 6-18, 6-19
Throttle grip • Make sure that operation is smooth.
• Check cable free play.
• If necessary, have Yamaha dealer adjust cable free play and lubricate cable and 
grip housing. 6-15, 6-22
Control cables • Make sure that operation is smooth.
• Lubricate if necessary. 6-22
Wheels and tires • Check for damage.
• Check tire condition and tread depth.
• Check air pressure.
• Correct if necessary. 6-16, 6-17
Before using this vehicle, check the following points: 
						

							
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EAU15581
FOR YOUR SAFETY - PRE-OPERATION CHECKS
4-3
Brake levers• Make sure that operation is smooth.
• Lubricate lever pivoting points if necessary. 6-22
Centerstand, sidestand • Make sure that operation is smooth.
• Lubricate pivots if necessary. 6-22
Chassis fasteners • Make sure that all nuts, bolts and screws are properly tightened.
• Tighten if necessary. -
Instruments, lights, signals 
and switches • Check operation. 
• Correct if necessary.
3-2, 3-4
Engine stop switch • Check operation. 3-4
Sidestand switch • Check operation of ignition circuit cut-off system. 
• If system is not working correctly, have Yamaha dealer check vehicle. 3-10
ITEM CHECKS PAGE 
						

							
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EAU15943
OPERATION AND IMPORTANT RIDING POINTS
EAU15943
OPERATION AND IMPORTANT RIDING POINTS
5-1
Starting the engine
EAU15951
Read the Owner’s Manual carefully to
become familiar with all controls. If there
is a control or function you do not un-
derstand, ask your Yamaha dealer.
EWA10271
WARNING
Failure to familiarize yourself with
the controls can lead to loss of con-
trol, which could cause an accident
or injury.
EAUT2702
Starting the engine
ECA10250
NOTICESee page 5-3 for engine break-in in-
structions prior to operating the ve-
hicle for the first time.In order for the ignition circuit cut-off
system to enable starting, the sidestand
must be up.
See page 3-10 for more information.1. Turn the key to “ON” and make sure that the engine stop switch is set
to “#”.
The engine trouble warning light
should come on for a few seconds,
then go off. 
NOTICE:
 If the warn-
ing light does not go off, have a
Yamaha dealer check its electri-
cal circuit.
[ECAT1120]
2. Close the throttle completely.
3. Start the engine by pushing the start switch while applying the front
or rear brake. 
NOTICE:
 For maxi-
mum engine life, never acceler-
ate hard when the engine is
cold!
[ECA11041]
If the engine does not start, release
the start switch, wait a few sec-
onds, 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.
EAU45310
TIP
This model is equipped with a lean angle
sensor to stop the engine in case of a
turnover. To start the engine after a turn-
over, be sure to turn the main switch to
“OFF” and then to “ON”. Failing to do so
will prevent the engine from starting
even though the engine will crank when
pushing the start switch. 
						

							
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EAU15943
OPERATION AND IMPORTANT RIDING POINTS
5-2
Starting off
Acceleration and deceleration
Braking
EAU16793
Braking
EWA10300
WARNING
●
● ●
●
●
Avoid braking hard or suddenly
(especially when leaning over to
one side), otherwise the scooter
may skid or overturn.
●
● ●
●
●
Railroad crossings, streetcar
rails, iron plates on road con-
struction sites, and manhole
covers become extremely slip-
pery when wet. Therefore, slow
down when approaching such
areas and cross them with cau-
tion.
●
● ●
●
●
Keep in mind that braking on a
wet road is much more difficult.
●
● ●
●
●
Ride slowly down a hill, as brak-
ing downhill can be very diffi-
cult.
1. Close the throttle completely.
2. Apply both front and rear brakes
simultaneously while gradually in-
creasing the pressure.
EAU16761
Starting offTIP
Before starting off, allow the engine to
warm up.1. While pulling the rear brake lever
with your left hand and holding the
grab bar with your right hand, push
the scooter off the centerstand.
2. Sit astride the seat, and then ad- just the rear view mirrors.
3. Switch the turn signals on.
4. Check for oncoming traffic, and then slowly turn the throttle grip (on
the right) in order to take off.
5. Switch the turn signals off.
EAU16780
Acceleration and decelera-
tion
(a) (b)
The speed can be adjusted by opening
and closing the throttle. To increase the
speed, turn the throttle grip in direction
(a). To reduce the speed, turn the throttle
grip in direction (b). 
						

							
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EAU15943
OPERATION AND IMPORTANT RIDING POINTS
5-3
EAU16830
Engine break-inThere is never a more important period
in the life of your engine than the period
between 0 and 1000 km (600 mi). For
this reason, you should read the follow-
ing material carefully.
Since the engine is brand new, do not
put an excessive load on it for the first
1000 km (600 mi). The various parts in
the engine wear and polish themselves
to the correct operating clearances. Dur-
ing this period, prolonged full-throttle
operation or any condition that might
result in engine overheating must be
avoided.
Fuel consumption, tips for reducing
Engine break-in
EAU16820
Tips for reducing fuel con-
sumptionFuel consumption depends largely on
your riding style. Consider the following
tips to reduce fuel consumption:●
Avoid high engine speeds during
acceleration.
●
Avoid high engine speeds with no
load on the engine.
●
Turn the engine off instead of let-
ting it idle for an extended length
of time (e.g., in traffic jams, at traf-
fic lights or at railroad crossings).
EAU16951
0 ~ 150 km (0 ~ 90 mi)
Avoid prolonged operation above 1/3
throttle.
After every hour of operation, stop the
engine, and then let it cool for five to
ten minutes.
Vary the engine speed from time to time.
Do not operate the engine at one set
throttle position. 150 ~ 500 km (90 ~ 300 mi)
Avoid prolonged operation above 1/2
throttle.
Rev the engine freely through the gears,
but do not use full throttle at any time.
500 ~ 1000 km (300 ~ 600 mi)
Avoid prolonged operation above 3/4
throttle. 
NOTICE:
 After 1000 km (600
mi) of operation, the engine oil must
be changed and the oil strainer
cleaned.
[ECA10351]
1000 km (600 mi) and beyond
Avoid prolonged full-throttle operation.
Vary the speed occasionally.
ECA10270
NOTICEIf any engine trouble should occur
during the engine break-in period,
immediately have a Yamaha dealer
check the vehicle. 
						

							
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EAU15943
OPERATION AND IMPORTANT RIDING POINTS
Parking
5-4
EAU17213
ParkingWhen parking, stop the engine, and then
remove the key from the main switch.
EWA10311
WARNING
●
● ●
●
●
Since the engine and exhaust
system can become very hot,
park in a place where pedestri-
ans or children are not likely to
touch them and be burned.
●
● ●
●
●
Do not park on a slope or on soft
ground, otherwise the vehicle
may overturn, increasing the risk
of a fuel leak and fire.
●
● ●
●
●
Do not park near grass or other
flammable materials which
might catch fire. 
						

							
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EAU1722A
PERIODIC MAINTENANCE AND ADJUSTMENT
EAU1722A
PERIODIC MAINTENANCE AND ADJUSTMENT
6-1
EAU17232
Periodic inspection, adjustment, and lu-
brication will keep your vehicle in the
safest and most efficient condition pos-
sible. Safety is an obligation of the ve-
hicle owner/operator. The most important
points of vehicle inspection, adjustment,
and lubrication are explained on the fol-
lowing pages.
EWA10321
WARNING
Failure to properly maintain the ve-
hicle or performing maintenance ac-
tivities incorrectly may increase your
risk of injury or death during service
or while using the vehicle. If you are
not familiar with vehicle service, have
a Yamaha dealer perform service.
EWA15121
WARNING
Turn off the engine when performing
maintenance unless otherwise speci-
fied.●
● ●
●
●
A running engine has moving
parts that can catch on body parts
or clothing and electrical parts
that can cause shocks or fires.
●
● ●
●
●
Running the engine while servic-
ing can lead to eye injury, burns,
fire, or carbon monoxide poison-
ing  possibly leading to death.
See page 1-3 for more informa-
tion about carbon monoxide.
EAU17302
Emission controls not only function to
ensure cleaner air, but are also vital to
proper engine operation and maximum
performance. In the following periodic
maintenance charts, the services re-
lated to emissions control are grouped
separately. These services require spe-
cialized data, knowledge, and equip-
ment. Maintenance, replacement, or
repair of the emission control devices
and systems may be performed by any
repair establishment or individual that
is certified (if applicable). Yamaha deal-
ers are trained and equipped to perform
these particular services. 
						

							
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EAU1722A
PERIODIC MAINTENANCE AND ADJUSTMENT
Tool kit
EAU17521
Owner’s tool kit
1
1. Owner’s tool kitThe owner’s tool kit is located inside the
storage compartment under the seat.
(See page 3-8.)
The service information included in this
manual and the tools provided in the
owner’s tool kit are intended to assist
you in the performance of preventive
maintenance and minor repairs. How-
ever, additional tools such as a torque
wrench may be necessary to perform
certain maintenance work correctly.
TIP
If you do not have the tools or experi-
ence required for a particular job, have
a Yamaha dealer perform it for you.
6-2 
						

							
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EAU1722A
PERIODIC MAINTENANCE AND ADJUSTMENT
6-3
Maintenance, emission control system
EAU17560
Periodic maintenance chart for the emission control system
* Since these items require special tools, data and technical skills, have a Yamaha dealer perform the service.NO. ITEM ROUTINEINITIAL ODOMETER READING
600 mi
(1,000 km) or1
month 2,000 mi 
(4,000 km) or6
months 4,000 mi
(7,000 km) or
12
months 6,000 mi 
(10,000 km) or
18
months 8,000 mi 
(13,000 km) or
24
months 10,000 mi 
(16,000 km) or
30
months
1
*
Fuel line • Check fuel hoses for cracks or 
damage.
• Replace if necessary. —————
2 Spark plug • Check condition.
• Adjust gap and clean.
• Replace at 4000 mi (7000 km) or 
12 months and thereafter every 
4000 mi (6000 km) or 12 months. —
Replace. —Replace. —
3
*
Valve clearance • Check and adjust valve clearance 
when engine is cold. ——————
4
*
Crankcase breather 
system • Check breather hose for cracks or 
damage.
• Replace if necessary. —————
5
*
Fuel injection • Check engine idle speed. ——————
6
*
Exhaust system • Check for leakage.
• Tighten if necessary.
• Replace gasket(s) if necessary. ——————