check engine light YAMAHA XMAX 125 2016 User Guide

Periodic maintenance and adjustment
6-9
6
EAUM3360
Checking the spark plug
The spark plug is an important engine
component, which is easy to check.
Since heat and deposits will cause any
spark plug to slowly erode, the spark
plug should be removed and checked
in accordance with the periodic main-
tenance and lubrication chart. In addi-
tion, the condition of the spark plug
can reveal the condition of the engine.
To remove the spark plug
1. Place the vehicle on the center-
stand
2. Open the seat. (See page 3-20.)
3. Remove the rear storage com-
partment by removing the bolts.
4. Remove the spark plug cap.5. Remove the spark plug as shown,
with the spark plug wrench includ-
ed in the owner’s tool kit.
To check the spark plug
1. Check that the porcelain insulator
around the center electrode of the
spark plug is a medium-to-light
tan (the ideal color when the vehi-
cle is ridden normally).
TIP
If the spark plug shows a distinctly dif-
ferent color, the engine could be oper-
ating improperly. Do not attempt to
diagnose such problems yourself. In-
stead, have a Yamaha dealer check
the vehicle.
2. Check the spark plug for electrode
erosion and excessive carbon or
other deposits, and replace it if
necessary.
3. Measure the spark plug gap with a
wire thickness gauge and, if nec-
essary, adjust the gap to specifi-
cation.
1. Storage compartment
2. Bolt
3. Rubber cap
1. Spark plug cap
ZAUM1040
23
1
ZAUM1117
1
1. Spark plug wrench
Specified spark plug:
NGK/CPR9EA-9
ZAUM1118
1
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Periodic maintenance and adjustment
6-10
6 To install the spark plug
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.
4. Place the rear storage compart-
ment in the original position and
install the bolts.
5. Close the seat.
EAUM3332
Engine oil
The engine oil level should be checked
before each ride. In addition, the oil
must be changed at the intervals spec-
ified in the periodic maintenance and
lubrication chart and when the service
indicator light comes on.
To check the engine oil level
1. Place the scooter 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 oil filler cap, wipe
the dipstick clean, insert it back
into the oil filler hole (without
screwing it in), and then remove it
again to check the oil level.
TIP
The engine oil should be between the
minimum and maximum level marks.
4. If the engine oil is below the mini-
mum level mark, add sufficient oil
of the recommended type to raise
it to the correct level.
1. Spark plug gap
Spark plug gap:
0.8–0.9 mm (0.031–0.035 in)
Tightening torque:
Spark plug:
12.5 Nm (1.25 m·kgf, 9.04 ft·lbf)
1
1. Engine oil filler cap
2. Maximum level mark
3. Minimum level mark
1
3
2
1
ZAUM0685
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Periodic maintenance and adjustment
6-14
6
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.
EAUM3045To check the coolant level
1. Place the vehicle on a level sur-
face and hold it in an upright posi-
tion.
2. Open the front storage compart-
ment A. (See page 3-21.)
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.
3. Check the coolant level through
the check window.
TIP
The coolant should be between the
minimum and maximum level marks.
4. If the coolant is at or below the
minimum level mark, remove pan-
el A. (See page 6-7.)
5. Open the reservoir cap, and then
add coolant to the maximum level
mark. WARNING! Remove only
the coolant reservoir cap. Never
attempt to remove the radiator
cap when the engine is hot.
[EWA15162] NOTICE: If coolant is not
available, use distilled water or
soft tap water instead. Do not
use hard water or salt water
since it is harmful to the engine.
If water has been used instead
of coolant, replace it with cool-
ant as soon as possible, other-
wise the cooling system will not
be protected against frost and
corrosion. If water has been
added to the coolant, have a
Yamaha dealer check the anti-
freeze content of the coolant as
soon as possible, otherwise the
effectiveness of the coolant will
be reduced.
[ECA10473]
6. Close the reservoir cap, and then
install the panel.1. Maximum level mark
2. Minimum level mark
ZAUM1029
2 1Coolant LevelCoolant L
evelH
ighH
igh
LowLo
w1. Coolant reservoir cap
Coolant reservoir capacity:
0.32 L (0.34 US qt, 0.28 Imp.qt)
ZAUM1030
1
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10-1
10
Index
A
ABS (for ABS models) .......................... 3-16
ABS warning light (for ABS models)....... 3-4
Acceleration and deceleration................ 5-3
Air filter and V-belt case air filter
elements ............................................ 6-15
Auxiliary lights ...................................... 6-31
B
Battery .................................................. 6-27
Brake fluid, changing ........................... 6-23
Brake fluid level, checking ................... 6-22
Brake lever, front .................................. 3-15
Brake lever, rear ................................... 3-16
Brake levers, lubricating ....................... 6-25
Braking ................................................... 5-4
C
Cables, checking and lubricating ......... 6-24
Care ........................................................ 7-1
Catalytic converters ............................. 3-19
Centerstand and sidestand, checking
and lubricating ................................... 6-25
Coolant ................................................. 6-14
D
Dimmer switch ..................................... 3-14
E
Engine break-in ...................................... 5-5
Engine oil .............................................. 6-10
Engine trouble warning light................... 3-4
F
Final transmission oil ............................ 6-13
Front and rear brake lever free play,
checking............................................. 6-20
Front and rear brake pads, checking ... 6-21
Front fork, checking ............................. 6-26
Front turn signal light ........................... 6-32
Fuel....................................................... 3-18
Fuel consumption, tips for reducing ...... 5-5
Fuel level warning light ........................... 3-4
Fuel tank cap........................................ 3-17
Fuses, replacing ................................... 6-29
H
Handlebar switches.............................. 3-14
Hazard switch ...................................... 3-14
Headlight bulb, replacing ..................... 6-31
High beam indicator light ....................... 3-4
Horn switch .......................................... 3-14
I
Identification numbers............................ 9-1
Ignition circuit cut-off system............... 3-24
Immobilizer system ................................ 3-1Immobilizer system indicator light .......... 3-5
Indicator lights and warning lights .......... 3-4
Info switch ............................................ 3-15
L
License plate light bulb, replacing ........ 6-34
M
Main switch/steering lock ....................... 3-2
Maintenance and lubrication, periodic ... 6-4
Maintenance, emission control
system .................................................. 6-3
Matte color, caution ................................ 7-1
Model label ............................................. 9-1
Multi-function meter unit ........................ 3-6
P
Panels, removing and installing .............. 6-7
Parking .................................................... 5-6
Part locations .......................................... 2-1
Pass switch........................................... 3-14
S
Safe-riding points ................................... 1-5
Safety information................................... 1-1
Seat....................................................... 3-20
Shock absorber assemblies,
adjusting ............................................. 3-22
Sidestand .............................................. 3-23
Spark plug, checking .............................. 6-9
Specifications ......................................... 8-1
Starting off .............................................. 5-3
Starting the engine.................................. 5-2
Start switch ........................................... 3-14
Steering, checking ................................ 6-26
Storage ................................................... 7-4
Storage compartments ......................... 3-21
T
Tail/brake light ...................................... 6-32
Throttle grip and cable, checking and
lubricating ........................................... 6-24
Throttle grip free play, checking ........... 6-17
Tires ...................................................... 6-18
Tool kit .................................................... 6-2
Troubleshooting .................................... 6-34
Troubleshooting charts ......................... 6-35
Turn signal indicator lights ...................... 3-4
Turn signal light bulb (rear), replacing... 6-33
Turn signal switch ................................. 3-14
V
Valve clearance..................................... 6-17
Vehicle identification number ................. 9-1
W
Wheel bearings, checking..................... 6-27
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