PERIODIC MAINTENANCE AND MINOR REPAIR
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To install the cowling
Place the cowling in the original posi-
tion, and then install the screws and the
quick fastener.NOTE:
To install the quick fastener, push the
center pin out so that it will protrude
from the fastener head, insert the fas-
tener into the cowling, and then push
the protruding pin in until it is flush with
the fastener head.
EAU19171
Panels A and B
To remove one of the panels
1. Remove the corresponding cowl-
ing A or B. (See page 6-5.)
2. Remove the seat. (See
page 3-14.)
3. Remove the screw, and then take
the panel off.To install the panel
1. Place the panel in the original po-
sition, and then install the screw.
2. Install the seat and the cowling.
EAU19641
Checking the spark plugs
The spark plugs are important engine
components, which should be checked
periodically, preferably by a Yamaha
dealer. Since heat and deposits will
cause any spark plug to slowly erode,
they should be removed and checked
in accordance with the periodic mainte-
nance and lubrication chart. In addition,
the condition of the spark plugs can re-
veal the condition of the engine.
The porcelain insulator around the cen-
ter electrode of each spark plug should
be a medium-to-light tan (the ideal color
when the vehicle is ridden normally),
and all spark plugs installed in the en-
gine should have the same color. If any
spark plug shows a distinctly different
color, the engine could be defective. Do
not attempt to diagnose such problems
yourself. Instead, have a Yamaha deal-
er check the vehicle.
If a spark plug shows signs of electrode
erosion and excessive carbon or other
deposits, it should be replaced.
1. Screw
1. Panel A
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Before installing a spark plug, the spark
plug gap should be measured with a
wire thickness gauge and, if necessary,
adjusted to specification.
Clean the surface of the spark plug
gasket and its mating surface, and then
wipe off any grime from the spark plug
threads.
NOTE:
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 speci-
fied torque as soon as possible.
EAU19830
Engine oil and oil filter
element
The engine oil level should be checked
before each ride. In addition, the oil
must be changed and the oil filter ele-
ment replaced at the intervals specified
in the periodic maintenance and lubri-
cation chart.
To check the engine oil level
1. Place the vehicle on a level sur-
face and hold it in an upright posi-
tion.
NOTE:
Make sure that the vehicle is positioned
straight up when checking the oil level.
A slight tilt to the side can result in a
false reading.
2. Start the engine, warm it up for 15
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 with the arrow
mark pointing upward as shown),
and then remove it again to check
Specified spark plug:
NGK/DPR8EA-9
DENSO/X24EPR-U9
1. Spark plug gap
Spark plug gap:
0.8–0.9 mm (0.031–0.035 in)
1
Tightening torque:
Spark plug:
17.5 Nm (1.75 m·kgf, 12.7 ft·lbf)
PERIODIC MAINTENANCE AND MINOR REPAIR
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CAUTION:
ECA11620
In order to prevent clutch slip-
page (since the engine oil also
lubricates the clutch), do not
mix any chemical additives. Do
not use oils with a diesel speci-
fication of “CD” or oils of a high-
er quality than specified. In
addition, do not use oils labeled
“ENERGY CONSERVING II” or
higher.
Make sure that no foreign mate-
rial enters the crankcase.
9. Start the engine, and then let it idle
for several minutes while checking
it for oil leakage. If oil is leaking, im-
mediately turn the engine off and
check for the cause.
10. Turn the engine off, and thencheck the oil level and correct it if
necessary.
EAU20070
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.
EAU38581
To check the coolant level
1. Place the vehicle on a level sur-
face and hold it in an upright posi-
tion.
NOTE:
The coolant level must be checked
on a cold engine since the level
varies with engine temperature.
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 in the cool-
ant reservoir.
NOTE:
The coolant should be between the
minimum and maximum level marks.
Recommended engine oil:
See page 8-1.
Oil quantity:
Without oil filter element replace-
ment:
3.80 L (4.02 US qt) (3.34 Imp.qt)
With oil filter element replacement:
3.90 L (4.12 US qt) (3.43 Imp.qt)
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NOTE:
If the specified clutch lever free play
could be obtained as described above,
tighten the locknut and skip the rest of
the procedure, otherwise proceed as
follows.
3. Fully turn the adjusting bolt at the
clutch lever in direction (a) to loos-
en the clutch cable.
4. Loosen the locknut at the crank-
case.
5. To increase the clutch lever free
play, turn the adjusting nut in direc-
tion (a). To decrease the clutch le-ver free play, turn the adjusting nut
in direction (b).
6. Tighten the locknut at the clutch le-
ver and the crankcase.
EAU22270
Adjusting the rear brake light
switch
The rear brake light switch, which is ac-
tivated by the brake pedal, is properly
adjusted when the brake light comes
on just before braking takes effect. If
necessary, adjust the brake light switch
as follows.
Turn the adjusting nut while holding the
rear brake light switch in place. To
make the brake light come on earlier,
turn the adjusting nut in direction (a). To
make the brake light come on later, turn
the adjusting nut in direction (b).
1. Locknut (crankcase)
2. Clutch lever free play adjusting nut
(crankcase)
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(a)(b)
1. Rear brake light switch
2. Rear brake light switch adjusting nut
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2 (a)(b)
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9 To charge the battery
Have a Yamaha dealer charge the bat-
tery as soon as possible if it seems to
have discharged. Keep in mind that the
battery tends to discharge more quickly
if the vehicle is equipped with optional
electrical accessories.
To store the battery
1. If the vehicle will not be used for
more than one month, remove the
battery, fully charge it, and then
place it in a cool, dry place.
2. If the battery will be stored for more
than two months, check it at least
once a month and fully charge it if
necessary.
3. Fully charge the battery before in-
stallation.
4. After installation, make sure that
the battery leads are properly con-
nected to the battery terminals.
CAUTION:
ECA10630
Always keep the battery
charged. Storing a discharged
battery can cause permanent
battery damage.
To charge a sealed-type (MF)battery, a special (constant-volt-
age) battery charger is required.
Using a conventional battery
charger will damage the battery.
If you do not have access to a
sealed-type (MF) battery charg-
er, have a Yamaha dealer
charge your battery.
EAU38591
Replacing the fuses
For TDM900
1. Backup fuse (for odometer and clock)
2. Radiator fan fuse
3. Turn signal light and hazard fuse
4. Ignition fuse
5. Signaling system fuse
6. Headlight fuse
7. Spare fuse
8. Fuel injection system fuse
9. Main fuse
12 34 5 6 8 97
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9For TDM900A
The main fuse and the fuse box, which
contains the fuses for the individual cir-
cuits, are located under the seat. (See
page 3-14.)
If a fuse is blown, replace it as follows.
1. Turn the key to “OFF” and turn offthe electrical circuit in question.
2. Remove the blown fuse, and then
install a new fuse of the specified
amperage.
CAUTION:
ECA10640
Do not use a fuse of a higher amper-
age rating than recommended toavoid causing extensive damage to
the electrical system and possibly a
fire.
3. Turn the key to “ON” and turn on
the electrical circuit in question to
check if the device operates.
4. If the fuse immediately blows
again, have a Yamaha dealer
check the electrical system.
1. Backup fuse (for odometer and clock)
2. Radiator fan fuse
3. Turn signal light and hazard fuse
4. Ignition fuse
5. Signaling system fuse
6. Headlight fuse
7. ABS motor fuse (for ABS models)
8. ABS motor spare fuse (for ABS models)
9. Main fuse
10. Spare fuse
11. Fuel injection system fuse
12. ABS control unit fuse (for ABS models)
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Specified fuses:
Main fuse:
40.0 A
Headlight fuse:
TDM900 15.0 A
TDM900A 20.0 A
Radiator fan fuse:
20.0 A
Ignition fuse:
10.0 A
Signaling system fuse:
10.0 A
Backup fuse:
TDM900 5.0 A
TDM900A 10.0 A
Fuel injection system fuse:
10.0 A
Turn signal light and hazard fuse:
10.0 A
ABS motor fuse:
TDM900A 30.0 A
ABS control unit fuse:
TDM900A 10.0 A
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EAU23750
Replacing a headlight bulb
This model is equipped with two quartz
bulb headlights. If a headlight bulb
burns out, replace it as follows.
1. Disconnect the headlight coupler,
and then remove the headlight
bulb cover.
2. Unhook the headlight bulb holder,
and then remove the defective
bulb.
WARNING
EWA10790
Headlight bulbs get very hot. There-
fore, keep flammable products away
from a lit headlight bulb, and do not
touch the bulb until it has cooled
down.
3. Place a new bulb into position, and
then secure it with the bulb holder.
CAUTION:
ECA10650
Take care not to damage the follow-
ing parts:
Headlight bulb
Do not touch the glass part of the
headlight bulb to keep it free from
oil, otherwise the transparency ofthe glass, the luminosity of the bulb,
and the bulb life will be adversely af-
fected. Thoroughly clean off any dirt
and fingerprints on the headlight
bulb using a cloth moistened with al-
cohol or thinner.
Headlight lens
Do not affix any type of tinted
film or stickers to the head-
light lens.
Do not use a headlight bulb of
a wattage higher than speci-
fied.
4. Install the bulb cover, and then
connect the coupler.
5. Have a Yamaha dealer adjust the
headlight beam if necessary.
1. Headlight bulb holder
2. Headlight coupler
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1. Headlight bulb holder
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1. Do not touch the glass part of the bulb.
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EAU24080
Replacing the tail/brake light
bulb
1. Remove the seat. (See
page 3-14.)
2. Remove the socket (together with
the bulb) by turning it counter-
clockwise.
3. Remove the defective bulb by
pushing it in and turning it counter-
clockwise.
4. Insert a new bulb into the socket,
push it in, and then turn it clock-
wise until it stops.
5. Install the socket (together with the
bulb) by turning it clockwise.
6. Install the seat.
EAU24202
Replacing a turn signal light
bulb
1. Remove the turn signal light lens
by removing the screw.
2. Remove the defective bulb by
pushing it in and turning it counter-
clockwise.3. Insert a new bulb into the socket,
push it in, and then turn it clock-
wise until it stops.
4. Install the lens by installing the
screw.
CAUTION:
ECA11190
Do not overtighten the screw, other-
wise the lens may break.
1. Socket
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1. Screw
2. Turn signal light lens
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1. Turn signal light bulb
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