2021 YAMAHA NMAX 155 wheel
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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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For your safety – pre-operation checks
7-2
7
Rear 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 specified brake fluid to specified level.
• Check hydraulic system for leakage. 9-21, 9-22, 9-23
Throttle grip • Make sure that operation is smooth.
• Check throttle grip free play.
• If necessary, have Yamaha dealer adjust throttle grip free play and lubricate ca-
ble and grip housing. 9-19, 9-25
Control ca bles • Make sure that operation is smooth.
• Lubricate if necessary. 9-25
Wheels an d tires • Check for damage.
• Check tire condition and tread depth.
• Check air pressure.
• Correct if necessary. 9-19, 9-21
Brake levers • Make sure that operation is smooth.
• Lubricate lever pivoting points if necessary.
9-25
Centerstan d, si destan d • Make sure that operation is smooth.
• Lubricate pivots if necessary.
9-26
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.
6-22
ITEM CHECKS PAGE
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Periodic maintenance an d a djustment
9-3
9
EAU71342
General maintenance an d lu brication chartNO. ITEM CHECK OR MAINTENANCE JOB ODOMETER READING
ANNUAL
CHECK
1000 km
(600 mi) 6000 km
(3500 mi) 12000 km
(7000 mi) 18000 km
(10500 mi) 24000 km
(14000 mi)
1 *Dia
gnostic system
check • Perform dynamic inspection us-
ing Yamaha diagnostic tool.
• Check the error codes.
2 *Air filter element • Replace. Every 18000 km (10500 mi)
3 Air filter case check
hose • Clean.
4 *V-
belt case air filter
element • Clean.
• Replace if necessary.
5 *Battery • Check voltage.
• Charge if necessary.
6 *Front brake • Check operation, fluid level, and
for fluid leakage.
• Replace brake pads if necessary.
7 *Rear brake • Check operation, fluid level, and
for fluid leakage.
• Replace brake pads if necessary.
8 *Brake hose • Check for cracks or damage.
• Replace. Every 4 years
9 *Brake flui d • Change. Every 2 years
10 *Wheels • Check runout and for damage.
• Replace if necessary.
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Periodic maintenance an d a djustment
9-4
9
11 *Tires • Check tread depth and for dam-
age.
• Replace if necessary.
• Check air pressure.
• Correct if necessary.
12 *Wheel bearin gs • Check bearing for looseness or
damage.
13 *Steerin g b earin gs • Check bearing assemblies for
looseness.
• Moderately repack with lithium- soap-based grease.
14 *Chassis fasteners • Make sure that all nuts, bolts and
screws are properly tightened.
15 Front an
d rear
b rake lever pivot
shaft • Lubricate with silicone grease.
16 Si
destan d, center-
stan d • Check operation.
• Lubricate with lithium-soap-
based grease.
17 *Sidestan d switch • Check operation and replace if
necessary.
18 *Front fork • Check operation and for oil leak-
age.
• Replace if necessary.
19 *Shock a
bsor ber as-
sem blies • Check operation and for oil leak-
age.
• Replace if necessary.
NO. ITEM CHECK OR MAINTENANCE JOB
ODOMETER READING
ANNUAL
CHECK
1000 km
(600 mi) 6000 km
(3500 mi) 12000 km
(7000 mi) 18000 km
(10500 mi) 2400
0 km
(14000 mi)
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Periodic maintenance an d a djustment
9-14
9
5. Remove the final transmission oil
drain bolt and its gasket to drain
the oil from the final transmission
case. 6. Install the final transmission oil
drain bolt and its new gasket, and
then tighten the bolt to the speci-
fied torque.
TIPBefore installing the final transmis-
sion oil drain bolt and gasket, ap-
ply oil to them.
Wipe off any excess oil after-
wards.7. Refill with the specified amount of
the recommended final transmis-
sion oil. WARNING! Make sure
that no forei gn material enters
the final transmission case.
Make sure that no oil gets on
the tire or wheel.
[EWA11312]
8. Install the final transmission oil fill- er cap and its new O-ring, and
then tighten the oil filler cap.
9. Check the final transmission case for oil leakage. If oil is leaking,
check for the cause.
1. Final transmission oil filler cap
2. O-ring
1. Final transmission oil drain bolt
2. Gasket
1
2
12
Ti ghtenin g torque:
Final transmission oil drain bolt:
20 N·m (2.0 kgf·m, 15 lb·ft)
Recommen ded final transmission
oil: See page 11-1.
Oil quantity:
0.10 L (0.11 US qt, 0.09 Imp.qt)
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Periodic maintenance an d a djustment
9-20
9
wei
ght of ri der, passen ger, car-
g o, an d accessories approve d
for this mo del.
WARNING
EWA10512
Never overload your vehicle. Opera-
tion of an overloa ded vehicle coul d
cause an acci dent.
Tire inspection
The tires must be checked before each
ride. If the center tread depth reaches
the specified limit, if the tire has a nail
or glass fragments in it, or if the side-
wall is cracked, have a Yamaha dealer
replace the tire immediately.TIPThe tire tread depth limits may differ
from country to country. Always com-
ply with the local regulations.
WARNING
EWA10472
Have a Yamaha dealer replace
excessively worn tires. Besi des
b ein g ille gal, operatin g the vehi-
cle with excessively worn tires
d ecreases ri din g sta bility an d
can lead to loss of control.
The replacement of all wheel
and b rake-relate d parts, inclu d-
in g the tires, shoul d b e left to a
Yamaha dealer, who has the
necessary professional knowl-
e dg e an d experience to d o so.
Ride at mo derate spee ds after
chan gin g a tire since the tire
surface must first b e “broken
in” for it to d evelop its optimal
characteristics.Tire information
This model is equipped with tubeless
tires and rubber tire air valves.
Tires age, even if they have not been
used or have only been used occasion-
ally. Cracking of the tread and sidewall
rubber, sometimes accompanied by
carcass deformation, is an evidence of
Col d tire air pressure:
1 person: Front: 150 kPa (1.50 kgf/cm2, 22 psi)
Rear: 250 kPa (2.50 kgf/cm2, 36 psi)
2 persons:
Front: 150 kPa (1.50 kgf/cm2, 22 psi)
Rear:
250 kPa (2.50 kgf/cm2, 36 psi)
Maximum loa d:
Veh ic le:
167 kg (368 lb)
The vehicle’s maximum load is the
combined weight of the rider, pas-
senger, cargo, and any accessories.
1. Tire sidewall
2. Tire wear indicator
3. Tire tread depth
Minimum tire trea d d epth (front an d
rear):
1.6 mm (0.06 in)
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Periodic maintenance an d a djustment
9-21
9 ageing. Old and aged tires shall be
checked by tire specialists to ascertain
their suitability for further use.
WARNING
EWA10462
The front an
d rear tires shoul d b e of
the same make an d d esi gn, other-
wise the han dlin g characteristics of
the vehicle may b e different, which
coul d lea d to an acci dent.After extensive tests, only the tires list-
ed below have been approved for this
model by Yamaha.
EAU21963
Cast wheelsTo maximize the performance, durabil-
ity, and safe operation of your vehicle,
note the following points regarding the
specified wheels.
The wheel rims should be
checked for cracks, bends, warp-
age or other damage before each
ride. If any damage is found, have
a Yamaha dealer replace the
wheel. Do not attempt even the
smallest repair to the wheel. A de-
formed or cracked wheel must be
replaced.
The wheel should be balanced
whenever either the tire or wheel
has been changed or replaced. An
unbalanced wheel can result in
poor performance, adverse han-
dling characteristics, and a short-
ened tire life.
EAU50861
Checkin g the front an d rear
b rake lever free playFront
Rear
Front tire:
Size:110/70-13M/C 48P
Manufacturer/model: DUNLOP/SCOOT SMART L
Rear tire:
Size:130/70-13M/C 63P
Manufacturer/model:
DUNLOP/SCOOT SMART L
1. No brake lever free play
1. No brake lever free play
1
1
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Periodic maintenance an d a djustment
9-28
9
EAU23292
Checkin g the wheel bearin gsThe front and rear wheel bearings must
be checked at the intervals specified in
the periodic maintenance and lubrica-
tion chart. If there is play in the wheel
hub or if the wheel does not turn
smoothly, have a Yamaha dealer
check the wheel bearings.
EAU50292
BatteryThe battery is located under the seat.
(See page 6-17.)
This model is equipped with a VRLA
(Valve Regulated Lead Acid) battery.
There is no need to check the electro-
lyte or to add distilled water. However,
the battery lead connections need to
be checked and, if necessary, tight-
ened.
WARNING
EWA10761
Electrolyte is poisonous an d
d an gerous since it contains sul-
furic aci d, which causes severe b
urns. Avoi d any contact with
skin, eyes or clothin g an d al-
ways shiel d your eyes when
workin g near b atteries. In case
of contact, ad minister the fol-
lowin g FIRST AID.
EXTERNAL: Flush with plenty of water.
INTERNAL: Drink lar ge quan-
tities of water or milk an d im-
me diately call a physician.
EYES: Flush with water for 15 minutes an d seek prompt
me dical attention.
Batteries pro duce explosive hy-
d ro gen gas. Therefore, keep
sparks, flames, ci garettes, etc.,
away from the battery an d pro-
vi de sufficient ventilation when
char gin g it in an enclose d
space.
KEEP THIS AND ALL BATTER-
IES OUT OF THE REACH OF
CHILDREN.
To char ge the b attery
Have a Yamaha dealer charge the bat-
tery as soon as possible if it seems to
have discharged. Keep in mind that the
1. Positive battery lead (red)
2. Battery
3. Negative battery lead (black)
3
2
1
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