2008 YAMAHA TDM 900 spark plugs

TABLE OF CONTENTS
SAFETY INFORMATION
...................1-1
DESCRIPTION
...................................2-1
Left view ...........................................2-1
Right view .........................................2-2
Controls and instruments..................2-3
INSTRUMENT AND CONTROL
FUNCTIONS
........................................3-1
Immobilizer system ..........................3-1
Main switch/steering lock .................3-2
Indicator and warning lights .............3-4
Tachometer unit ...............................3-6
Coolant temperature gauge .............3-6
Multi-function display .......................3-7
Anti-theft alarm (optional) ................3-8
Handlebar switches .........................3-9
Clutch lever ....................................3-10
Shift pedal ......................................3-10
Brake lever ....................................3-11
Brake pedal ...................................3-11
ABS ...............................................3-12
Fuel tank cap .................................3-12
Fuel ................................................3-13
Fuel tank breather hose .................3-14
Catalytic converters .......................3-14
Seat ...............................................3-14
Storage compartment ....................3-15
Adjusting the front fork ...................3-16
Adjusting the shock absorber
assembly ....................................3-17Luggage strap holders .................. 3-19
Sidestand ...................................... 3-19
Ignition circuit cut-off system ......... 3-20
PRE-OPERATION CHECKS
.............. 4-1
Pre-operation check list ................... 4-2
OPERATION AND IMPORTANT RIDING
POINTS
............................................... 5-1
Starting the engine .......................... 5-1
Shifting ............................................ 5-2
Tips for reducing fuel
consumption ................................ 5-3
Engine break-in ............................... 5-3
Parking ............................................ 5-4
PERIODIC MAINTENANCE AND MINOR
REPAIR
............................................... 6-1
Owner’s tool kit ................................ 6-1
Periodic maintenance and lubrication
chart ............................................. 6-2
Removing and installing cowlings and
panels .......................................... 6-6
Checking the spark plugs ................ 6-7
Engine oil and oil filter element ....... 6-8
Coolant .......................................... 6-11
Replacing the air filter element ...... 6-13
Adjusting the engine idling
speed ......................................... 6-15
Checking the throttle cable free
play ............................................ 6-15Valve clearance ............................ 6-16
Tires .............................................. 6-16
Cast wheels .................................. 6-19
Adjusting the clutch lever free
play ............................................ 6-19
Adjusting the rear brake light
switch ......................................... 6-20
Checking the front and rear brake
pads ........................................... 6-20
Checking the brake fluid level ....... 6-21
Changing the brake fluid ............... 6-22
Drive chain slack ........................... 6-22
Cleaning and lubricating the drive
chain .......................................... 6-24
Checking and lubricating the
cables ........................................ 6-25
Checking and lubricating the throttle
grip and cable ............................ 6-25
Checking and lubricating the brake
and shift pedals ......................... 6-25
Checking and lubricating the brake
and clutch levers ........................ 6-26
Checking and lubricating the
sidestand ................................... 6-26
Lubricating the rear suspension .... 6-26
Checking the front fork .................. 6-27
Checking the steering ................... 6-27
Checking the wheel bearings ........ 6-28
Battery ........................................... 6-28
Replacing the fuses ...................... 6-30
Replacing a headlight bulb ........... 6-31

PERIODIC MAINTENANCE AND MINOR REPAIR
6-2
1
2
3
4
5
6
7
8
9

EAU1770A
Periodic maintenance and lubrication chart
NOTE:


The annual checks must be performed every year, except if a kilometer-based maintenance, or for the UK, a
mileage-based maintenance, is performed instead.

From 50000 km (30000 mi), repeat the maintenance intervals starting from 10000 km (6000 mi).

Items marked with an asterisk should be performed by a Yamaha dealer as they require special tools, data and technical
skills.
NO. ITEM CHECK OR MAINTENANCE JOBODOMETER READING
ANNUAL
CHECK 1000 km
(600 mi)10000 km
(6000 mi)20000 km
(12000 mi)30000 km
(18000 mi)40000 km
(24000 mi)
1*
Fuel line

Check fuel hoses for cracks or
damage.
√√√√√
2*
Spark plugs

Check condition.

Clean and regap.
√√

Replace.
√√
3*
Valves

Check valve clearance.

Adjust.Every 40000 km (24000 mi)
4
Air filter element

Replace.
√
5
Clutch

Check operation.

Adjust.
√√√√√
6*
Front brake

Check operation, fluid level
and vehicle for fluid leakage.
√√√√√√

Replace brake pads. Whenever worn to the limit
7*
Rear brake

Check operation, fluid level
and vehicle for fluid leakage.
√√√√√√

Replace brake pads. Whenever worn to the limit
8*
Brake hoses

Check for cracks or damage.
√√√√√

Replace. Every 4 years

PERIODIC MAINTENANCE AND MINOR REPAIR
6-7
2
3
4
5
67
8
9
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 6-6.)
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.

EAU19642
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 operating im-
properly. Do not attempt to diagnose
such problems yourself. Instead, have
a Yamaha dealer 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
1
1

PERIODIC MAINTENANCE AND MINOR REPAIR
6-35
2
3
4
5
67
8
9

EAU42360
Troubleshooting charts
Starting problems or poor engine
performance
WARNING

EWA10840
Keep away open flames and do not smoke while checking or working on the fuel system.
Check the fuel level in
the fuel tank.1. Fuel
There is enough fuel.
There is no fuel.
Check the compression.
Supply fuel.
The engine does not start.
Check the compression.
Operate the electric starter.2. Compression
There is compression.
There is no compression.
Check the ignition.
Have a Yamaha dealer
check the vehicle.
Remove the spark plugs
and check the electrodes.3. Ignition
Wipe off with a dry cloth and correct the
spark plug gaps, or replace the spark plugs.
Have a Yamaha dealer check the vehicle.
The engine does not start.
Have a Yamaha dealer
check the vehicle.
The engine does not start.
Check the battery.
Operate the electric starter.4. Battery
The engine turns over
quickly.
The engine turns over
slowly.
The battery is good.Check the battery lead connections,
and charge the battery if necessary.
DryWet
Operate the electric starter.

MOTORCYCLE CARE AND STORAGE
7-4
1
2
3
4
5
6
7
8
9
fuel from deteriorating.
3. Perform the following steps to pro-
tect the cylinders, piston rings, etc.
from corrosion.
a. Remove the spark plug caps
and spark plugs.
b. Pour a teaspoonful of engine oil
into each spark plug bore.
c. Install the spark plug caps onto
the spark plugs, and then place
the spark plugs on the cylinder
head so that the electrodes are
grounded. (This will limit spark-
ing during the next step.)
d. Turn the engine over several
times with the starter. (This will
coat the cylinder walls with oil.)
e. Remove the spark plug caps
from the spark plugs, and then
install the spark plugs and the
spark plug caps.
WARNING

EWA10950
To prevent damage or injury from
sparking, make sure to ground the
spark plug electrodes while turning
the engine over.
4. Lubricate all control cables and thepivoting points of all levers and
pedals as well as of the sidestand/
centerstand.
5. Check and, if necessary, correct
the tire air pressure, and then lift
the motorcycle so that both of its
wheels are off the ground. Alterna-
tively, turn the wheels a little every
month in order to prevent the tires
from becoming degraded in one
spot.
6. Cover the muffler outlets with plas-
tic bags to prevent moisture from
entering them.
7. Remove the battery and fully
charge it. Store it in a cool, dry
place and charge it once a month.
Do not store the battery in an ex-
cessively cold or warm place
[less than 0 °C (30 °F) or more
than 30 °C (90 °F)]. For more in-
formation on storing the battery,
see page 6-28.
NOTE:

Make any necessary repairs before
storing the motorcycle.

INDEX
A
ABS ......................................................... 3-12
ABS warning light...................................... 3-4
Air filter element, replacing ..................... 6-13
Anti-theft alarm (optional).......................... 3-8
Auxiliary light bulb, replacing .................. 6-33
B
Battery..................................................... 6-28
Brake and clutch levers, checking and
lubricating ............................................. 6-26
Brake and shift pedals, checking and
lubricating ............................................. 6-25
Brake fluid, changing .............................. 6-22
Brake fluid level, checking ...................... 6-21
Brake lever .............................................. 3-11
Brake pedal ............................................. 3-11
C
Cables, checking and lubricating ............ 6-25
Care .......................................................... 7-1
Catalytic converters ................................ 3-14
Clutch lever ............................................. 3-10
Clutch lever free play, adjusting .............. 6-19
Coolant.................................................... 6-11
Coolant temperature gauge ...................... 3-6
Cowlings and panels, removing and
installing.................................................. 6-6
D
Dimmer switch .......................................... 3-9
Drive chain, cleaning and lubricating ...... 6-24
Drive chain slack ..................................... 6-22
E
Engine break-in ......................................... 5-3
Engine idling speed................................. 6-15
Engine oil and oil filter element ................. 6-8Engine stop switch .....................................3-9
Engine trouble warning light ......................3-4
F
Front and rear brake pads, checking .......6-20
Front fork, adjusting .................................3-16
Front fork, checking .................................6-27
Fuel ..........................................................3-13
Fuel consumption, tips for reducing ...........5-3
Fuel level warning indicator .......................3-4
Fuel tank breather hose ...........................3-14
Fuel tank cap ...........................................3-12
Fuses, replacing ......................................6-30
H
Handlebar switches ...................................3-9
Hazard switch ..........................................3-10
Headlight bulb, replacing .........................6-31
High beam indicator light ...........................3-4
Horn switch ................................................3-9
I
Identification numbers................................9-1
Ignition circuit cut-off system ...................3-20
Immobilizer system ....................................3-1
Immobilizer system indicator light ..............3-5
Indicator and warning lights .......................3-4
K
Key identification number ..........................9-1
L
Luggage strap holders .............................3-19
M
Main switch/steering lock ...........................3-2
Matte color, caution ...................................7-1
Model label ................................................9-2
Multi-function display .................................3-7
N
Neutral indicator light................................. 3-4
O
Oil level warning light ................................ 3-4
P
Parking ...................................................... 5-4
Part locations............................................. 2-1
Pass switch ............................................... 3-9
Periodic maintenance and lubrication
chart ........................................................ 6-2
Pre-operation check list ............................. 4-2
R
Rear brake light switch, adjusting............ 6-20
Rear suspension, lubricating ................... 6-26
S
Safety information ..................................... 1-1
Seat ......................................................... 3-14
Shifting ...................................................... 5-2
Shift pedal ............................................... 3-10
Shock absorber assembly, adjusting....... 3-17
Sidestand ................................................ 3-19
Sidestand, checking and lubricating ........ 6-26
Spark plugs, checking ............................... 6-7
Specifications ............................................ 8-1
Starting the engine .................................... 5-1
Start switch ................................................ 3-9
Steering, checking ................................... 6-27
Storage ...................................................... 7-3
Storage compartment .............................. 3-15
Supporting the motorcycle....................... 6-33
T
Tachometer unit ........................................ 3-6
Tail/brake light bulb, replacing................. 6-32
Throttle cable free play, checking............ 6-15