2019 YAMAHA NMAX 150 maintenance

Periodic maintenance an d a djustment
6-12
6
TIP
Be sure to wipe off spilled oil on any
parts after the engine and exhaust sys-
tem have cooled down.
NOTICE
ECA11621
 In or der to prevent clutch slip-
pa ge (since the en gine oil also
lu bricates the clutch), do not
mix any chemical additives. Do
not use oils with a diesel speci-
fication of “CD” or oils of a hi gh-
er quality than specifie d. In
a ddition, do not use oils la bele d
“ENERGY CONSERVING II” or
hi gher.
 Make sure that no forei gn mate-
rial enters the crankcase.
8. Start the engine, and then let it idle for several minutes while checking
it for oil leakage. If oil is leaking,
immediately turn the engine off
and check for the cause.
9. Turn the engine off, and then check the oil level and correct it if
necessary.
10. Reset the oil change tripmeter and oil change indicator “OIL”. (See
page 3-6 for reset procedures.)
EAU20067
Final transmission oil
The final transmission case must be
checked for oil leakage before each
ride. If any leakage is found, have a
Yamaha dealer check and repair the scooter. In addition, the final transmis-
sion oil must be changed as follows at
the intervals specified in the periodic
maintenance and lubrication chart. 1. Start the engine, warm up the final transmission oil by riding the
scooter for several minutes, and
then stop the engine.
2. Place the scooter on the center- stand.
3. Place an oil pan under the final transmission case to collect the
used oil.
4. Remove the final transmission oil filler cap and its O-ring from the fi-
nal transmission case.
5. Remove the final transmission oil drain bolt and its gasket to drain
the oil from the final transmission
case.
Recommen ded en gine oil:
See page 8-1.
Oil quantity: 0.90 L (0.95 US qt, 0.79 Imp.qt)
1. Final transmission oil filler cap
2. O-ring
1
2
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Periodic maintenance an d a djustment
6-13
6
6. Install the final transmission oil
drain bolt and its new gasket, and
then tighten the bolt to the speci-
fied torque.
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.
EAU20071
Coolant
The coolant level should be checked
before each ride. In addition, the cool-
ant must be changed at the intervals
specified in the periodic maintenance
and lubrication chart.
EAUN1090To check the coolant level1. Place the vehicle on the center- stand.
TIP
The coolant level must be
checked on a cold engine since
the level varies with engine tem-
perature.
 Make sure that the vehicle is posi-
tioned straight up when checking
the coolant level. A slight tilt to the
side can result in a false reading.
2. Check the coolant level through
the check window.
TIP
The coolant should be between the
minimum and maximum level marks.
1. Final transmission oil drain bolt
2. Gasket
Tightening torque:
Final transmission oil drain bolt: 20 N·m (2.0 kgf·m, 14 lb·ft)
Recommen ded final transmission
oil: See page 8-1.
Oil quantity: 0.15 L (0.16 US qt, 0.13 Imp.qt)
12
1. Coolant level check window
2. Maximum level mark
3. Minimum level mark
1
2
3
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Periodic maintenance an d a djustment
6-14
6 3. If the coolant is at or below the
minimum level mark, remove the
right floorboard mat by pulling it
up.
4. Remove the coolant reservoir cov- er.
5. Remove the coolant reservoir cap, add coolant to the maximum level
mark, and then install the reservoir
cap. WARNING! Remove only
the coolant reservoir cap. Never
attempt to remove the ra diator
cap when the en gine is hot.
[EWA15162] NOTICE: If coolant is not
availa ble, use d istilled water or
soft tap water instea d. Do not
use har d water or salt water
since it is harmful to the en gine.
If water has been used instead
of coolant, replace it with cool-
ant as soon as possi ble, other- wise the coolin
g system will not
b e protecte d a gainst frost an d
corrosion. If water has b een
a dde d to the coolant, have a
Yamaha dealer check the anti-
freeze content of the coolant as
soon as possi ble, otherwise the
effectiveness of the coolant will
b e red uced.
[ECA10473]
6. Install the coolant reservoir cover.
7. Place the right floorboard mat in
the original position and push it
downward to secure it.
EAU67280To chan ge the coolant
1. Place the vehicle on a level sur- face and let the engine cool if nec-
essary.
2. Remove panels A and B. (See page 6-7.)
3. Remove the radiator cover by re- moving the bolts.
1. Floorboard mat
1. Coolant reservoir cover
1
1
1. Coolant reservoir cap
Coolant reservoir capacity (up to
the maximum level mark):0.25 L (0.26 US qt, 0.22 Imp.qt)
1
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Periodic maintenance an d a djustment
6-15
6
4. Place a container under the en-
gine to collect the used coolant.
5. Remove the radiator cap. WARNING! Never attempt to re-
move the ra diator cap when the
en gine is hot.
[EWA10382]
6. Remove the coolant drain screw
and its O-ring to drain the cooling
system. 7. Remove the coolant drain bolt and
its gasket to drain the cooling sys-
tem.
8. Remove the coolant reservoir by removing the bolt.
1. Radiator cover
2. Bolt
1. Radiator cap
1
2
1
1. Coolant drain screw
2. O-ring
1. Coolant drain bolt
2. Gasket
1. Coolant reservoir cap
2. Coolant reservoir
3. Bolt
1
2
1
2
1
2
3
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Periodic maintenance an d a djustment
6-16
6 9. Remove the coolant reservoir cap,
and then turn the coolant reservoir
upside down to empty it.
10. After the coolant is completely drained, thoroughly flush the cool-
ing system with clean tap water.
11. Install the coolant reservoir by in- stalling the bolt.
12. Install the coolant drain bolt and its new gasket, and then tighten
the bolt to the specified torque.
13. Install the coolant drain screw and its new O-ring.
14. Pour the recommended coolant into the reservoir to the maximum
level mark, and then install the
coolant reservoir cap.
15. Pour the recommended coolant into the radiator until it is full.
16. Install the radiator cap, start the engine, let it idle for several min-
utes, and then turn it off.
17. Remove the radiator cap to check the coolant level in the radiator. If
necessary, add sufficient coolant until it reaches the top of the radi-
ator, and then install the radiator
cap.
18. Start the engine, and then check the vehicle for coolant leakage. If
coolant is leaking, have a Yamaha
dealer check the cooling system.
19. Install the radiator cover by install- ing the bolts.
20. Install the panels.
Ti ghtenin g torque:
Coolant drain bolt: 10 N·m (1.0 kgf·m, 7.2 lb·ft)
Antifreeze/water mixture ratio: 1:1
Recommen ded antifreeze:
High-quality ethylene glycol anti-
freeze containing corrosion inhibi-
tors for aluminum engines
Coolant quantity: Radiator (including all routes):0.46 L (0.49 US qt, 0.40 Imp.qt)
Coolant reservoir (up to the maxi-
mum level mark): 0.25 L (0.26 US qt, 0.22 Imp.qt)
UBV3E0E0.book Page 16 Monday, September 26, 2016 3:42 PM

Periodic maintenance an d a djustment
6-17
6
EAU67174
Air filter an d V- belt case air fil-
ter elements
The air filter element should be re-
placed and the V-belt case air filter el-
ement should be cleaned at the
intervals specified in the periodic main-
tenance and lubrication chart. Service
the air filter elements more frequently if
you are riding in unusually wet or dusty
areas. The air filter check hose and V-
belt case air filter check hose must be
frequently checked and cleaned if nec-
essary.
Cleanin g the air filter check hose
1. Check the hose on the rear side of the air filter case for accumulated
dirt or water.
2. If dirt or water is visible, remove the hose from the clamp, clean it,
and then install it.
TIP
If dirt or water was found in the check
hose, be sure to check the air filter ele-
ment for excessive dirt or damage and
replace it if necessary.
Replacin g the air filter element
1. Place the vehicle on the center- stand. 2. Remove the air filter case cover by
removing the screws.
3. Pull the air filter element out.
4. Insert a new air filter element into the air filter case. NOTICE: Make
sure that the air filter element is
properly seated in the air filter
case. The en gine shoul d never
b e operated without the air filter
element installed , otherwise the
piston(s) an d/or cylin der(s) may
b ecome excessively worn.
[ECA10482]
NOTICE
ECA21220
 The air filter element must be
replaced at the intervals speci-
fie d in the perio dic maintenance
an d lu brication chart.
1. Air filter check hose
1
1. Air filter case cover
2. Screw
1. Air filter element
2
21
1
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Periodic maintenance an d a djustment
6-18
6 
The air filter element nee ds
more frequent replacement if
you are ri din g in unusually wet
or dusty areas.
 Do not clean the air filter ele-
ment by blowin g it with com-
pressed air.
5. Install the air filter case cover by
installing the screws.
Cleanin g the V- belt case check hose
1. Check the hose on the rear side of the V-belt case for accumulated
dirt or water.
2. If dirt or water is visible, remove the hose from the clamp, clean it,
and then install it.
TIP
If dirt or water was found in the check
hose, be sure to check the V-belt case
air filter element for excessive dirt or
damage and clean or replace it if nec-
essary.
Cleanin g the V- belt case air filter el-
ement 1. Place the vehicle on the center- stand. 2. Remove the screws, and then pull
the V-belt case air filter element
cover outward and away from the
V-belt case.
3. Pull the V-belt case air filter ele- ment out, and then clean it with
solvent. After cleaning, remove
the remaining solvent by squeez-
ing the element. WARNING! Use
only a ded icated parts cleanin g
solvent. To avoi d the risk of fire
or explosion, do not use gaso-
line or solvents with a low flash
point.
[EWA10432] NOTICE: To avoi d
d amag ing the air filter element,
han dle it gently an d carefully,
an d d o not twist it.
[ECA10522]
1. V-belt case check hose
1
1. V-belt case air filter element cover
2. Screw
1. V-belt case air filter element
2
2
1
1
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Periodic maintenance an d a djustment
6-19
6
4. Apply oil of the recommended
type to the entire surface of the
sponge material, and then
squeeze the excess oil out.
TIP
The air filter element should be
wet but not dripping.
 Check the air filter element for ex-
cessive dirt or damage and re-
place it if necessary.
5. Insert the element into the V-belt
case.
6. Install the air filter element cover by installing the screws.
EAU21386
Checkin g the throttle grip free
play
Measure the throttle grip free play as
shown.
Periodically check the throttle grip free
play and, if necessary, have a Yamaha
dealer adjust it.
Recommen ded oil:
Yamaha foam air filter oil or other
quality foam air filter oil
1. Throttle grip free play
Throttle grip free play:
3.0–5.0 mm (0.12–0.20 in)
1
UBV3E0E0.book Page 19 Monday, September 26, 2016 3:42 PM