2018 YAMAHA NMAX 150 torque

Periodic maintenance an d a djustment
6-2
6
EAU39692
Owner’s tool kit
The owner’s tool kit is located on the
bottom of the seat. (See page 3-16.)
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.
1. Owner’s tool kit
1
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Periodic maintenance an d a djustment
6-10
6 To install the spark plu
g
1. Clean the surface of the spark plug gasket and its mating sur-
face, and then wipe off any grime
from the spark plug threads.
2. Install the spark plug with the spark plug wrench, and then tight-
en it to the specified torque.
TIP
If a torque wrench is not available
when installing a spark plug, a good
estimate of the correct torque is 1/4–
1/2 turn past finger tight. However, the
spark plug should be tightened to the
specified torque as soon as possible.
3. Install the spark plug cap.
TIP
Install the spark plug cap so that it is
positioned as shown in the illustration
and the spark plug lead does not con-
tact any surrounding parts.
4. Install the panels.
EAU66991
Engine oil an d oil strainer
The engine oil level should be checked
before each ride. In addition, the oil
must be changed and the oil strainer
cleaned at the intervals specified in the
periodic maintenance and lubrication
chart.
To check the en gine oil level
1. Place the vehicle on the center- stand. A slight tilt to the side can
result in a false reading.
2. Start the engine, warm it up for several minutes, and then turn it
off.
3. Wait a few minutes until the oil set- tles, remove the engine oil filler
cap, wipe the engine oil dipstick
clean, insert it back into the oil filler
hole (without screwing it in), and
then remove it again to check the
oil level. WARNING! The muffler
an d muffler protector become
very hot d uring use. To avoi d
possi ble burns, let the muffler
an d protector cool b efore re-
moving the oil filler cap.
[EWA17810]
TIP
The engine oil should be between the
tip of the dipstick and the maximum
level mark.
Tightenin g torque:
Spark plug: 13 N·m (1.3 kgf·m, 9.4 lb·ft)
1. Spark plug cap
2. Spark plug lead
1
2
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Periodic maintenance an d a djustment
6-11
6
4. If the engine oil is not between the
tip of the dipstick and the maxi-
mum level mark, add sufficient oil
of the recommended type to raise
it to the correct level.
5. Insert the dipstick into the oil filler hole, and then tighten the oil filler
cap.
To chan ge the en gine oil an d clean
the oil strainer 1. Start the engine, warm it up for several minutes, and then turn it
off.
2. Place an oil pan under the engine to collect the used oil.
3. Remove the engine oil filler cap and engine oil drain bolts A and B
to drain the oil from the crankcase.
NOTICE: When removin g the
en gine oil d rain bolt B, the O-
rin g, compression sprin g, an d
oil strainer will fall out. Take
care not to lose these parts.
[ECAT1022]
4. Clean the engine oil strainer with solvent, and then check it for dam-
age and replace it if necessary.
5. Install the engine oil strainer, com- pression spring, new O-ring and
engine oil drain bolt B.
TIP
Make sure that the O-ring is properly
seated.
6. Install engine oil drain bolt A andits new gasket, and then tighten
both drain bolts to their specified
torques.
7. Refill with the specified amount of the recommended engine oil, and
then install and tighten the oil filler
cap.
1. Engine oil filler cap
2. Engine oil dipstick
3. Maximum level mark
4. Tip of the engine oil dipstick
1
2
3
4
1. Engine oil drain bolt A
2. Gasket
3. Oil strainer
4. Compression spring
5. O-ring
6. Engine oil drain bolt B
Tightenin g torque:
Engine oil drain bolt A: 20 N·m (2.0 kgf·m, 14 lb·ft)
Engine oil drain bolt B:
32 N·m (3.2 kgf·m, 23 lb·ft)
1
3
4
5
6
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
6-16
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)
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Periodic maintenance an d a djustment
6-37
6
10. Place the taillight unit in the origi-
nal position, and then install the
screws and quick fasteners.
11. Install the taillight cover by install- ing the screws.
12. Install the grab bar by installing the bolts, and then tightening them to
the specified torque.
13. Close the seat.
EAU43054
Replacin g a front turn si gnal
lig ht bul b
1. Place the vehicle on the center-
stand.
2. Remove the turn signal light bulb socket (together with the bulb) by
turning it counterclockwise.
3. Remove the burnt-out bulb by pulling it out.
4. Insert a new bulb into the socket.
5. Install the socket (together with the bulb) by turning it clockwise.
Tightening torque:
Grab bar bolt: 17 N·m (1.7 kgf·m, 12 lb·ft)
1. Turn signal light bulb socket
1. Turn signal light bulb
1
1
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Periodic maintenance an d a djustment
6-38
6
EAU67320
Replacin g a rear turn si gnal
li g ht bul b
1. Open the seat. (See page 3-16.)
2. Remove the grab bar by removing
the bolts.
3. Remove the taillight cover by re- moving the screws.
4. Remove the turn signal light bulb socket (together with the bulb) by
turning it counterclockwise. 5. Remove the burnt-out bulb by
pulling it out.
6. Insert a new bulb into the socket.
7. Install the socket (together with the bulb) by turning it clockwise.
8. Install the taillight cover by install- ing the screws.
9. Install the grab bar by installing the bolts, and then tightening them to
the specified torque.
1. Grab bar
2. Bolt
1. Taillight cover
2. Screw
1
2
12
1. Turn signal light bulb socket
1. Turn signal light bulb
1
1
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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