2006 YAMAHA TTR90 engine

1 - 10
GEN
INFO
CONTROL FUNCTIONS
KICK STARTER
WARNING
Before starting the engine, be sure to shift
the transmission into neutral.
Rotate the kick starter 1 away from the
engine. Push the starter down lightly with your
foot until the gears engage, then kick smoothly
and forcefully to start the engine.
EC155001
THROTTLE GRIP
The throttle grip 1 is located on the right han-
dlebar; it accelerates or decelerates the
engine. For acceleration, turn the grip toward
you; for deceleration, turn it away from you.
1
EC156000
FRONT BRAKE LEVER
The front brake lever 1 is located on the right
handlebar. Pull it toward the handlebar to acti-
vate the front brake.
1
EC157000
REAR BRAKE PEDAL
The rear brake pedal 1 is located on the right
side of the machine. Press down on the brake
pedal to activate the rear brake.

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GEN
INFO
CONTROL FUNCTIONS
FUEL COCK
The fuel cock supplies fuel from the tank to
carburetor while filtering the fuel. The fuel cock
has the three positions:
OFF: With the lever in this position, fuel will not
flow. Always return the lever to this posi-
tion when the engine is not running.
ON: With the lever in this position, fuel flows
to the carburetor. Normal riding is done
with the lever in this position.
RES: This indicates reserve. If you run out of
fuel while riding, move the lever to this
position. FILL THE TANK AT THE FIRST
OPPORTUNITY. BE SURE TO SET
THE LEVER TO “ON” AFTER REFUEL-
ING.
STARTER LEVER (CHOKE)
When cold, the engine requires a richer air/fuel
mixture for starting. A separate starter circuit,
which is controlled by the starter lever 1, sup-
plies this mixture.
Pull the lever out to open the circuit (for start-
ing) and push the lever in to close the circuit.
FUEL TANK CAP
Remove the fuel tank cap 1 by turning
counter-clockwise.
WARNING
Do not overfill the fuel tank. Avoid spilling
fuel on the hot engine.
1
TOOL KIT
Spark plug wrench
Spark plug wrench 1 is used to remove and
install the spark plug.
Screw driver
This tool is used for preventive maintenance
and minor repairs.
1

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GEN
INFO
FUEL
Use regular gasoline. Always use fresh, name
brand gasoline.
WARNING
Do not overfill the fuel tank. Avoid spilling
fuel on the hot engine. Do not fill the fuel
tank above the bottom of the filler tube
1
as shown in the illustration or it may over-
flow when the fuel heats up later and
expands.
aFuel level
CAUTION:
Use only unleaded gasoline. The use of
leaded gasoline will cause severe damage
to the engine internal parts such as valves,
piston rings, and exhaust system, etc.
Recommended fuel:
For USA, AUS and NZ:
Unleaded gasoline only
For CDN, EUROPE and ZA:
Regular unleaded gasoline
only
Fuel tank capacity:
Total:
4.2 L (0.92 Imp gal, 1.11 US gal)
Reserve:
0.5 L (0.11 lmp gal, 0.13 US gal)
FUEL

GEN
INFO
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STARTING AND OPERATION
STARTING AND OPERATION
CAUTION:
Prior to operating the machine, perform
steps listed in pre-operation check list.
WARNING
Never start your engine or let it run for any
length of time in a closed area. The exhaust
fumes are poisonous and can cause loss of
consciousness and death within a short
time. Always operate your machine in an
area with adequate ventilation.
STARTING A COLD ENGINE
TT-R90
WARNING
Before starting the engine, be sure to shift
the transmission into neutral.
1. Turn the fuel cock to “ON”.
2. Operate the starter (choke) and completely
close the throttle grip.
3. Slide the “ENGINE STOP” switch to the
“”.
4. Kick the kick starter with full strength to
start the engine.
5. After the engine starts, warm up for one or
two minutes. Make sure the stater (choke)
is returned to the original position before
riding.
TT-R90E
WARNING
Before starting the engine, be sure to shift
the transmission into neutral.
NOTE:
This model is equipped with an ignition cir-
cuit cut-off system. In case of electric start-
ing, the engine can be started only when the
transmission is in neutral.
If the engine fails to start by pushing the start
switch, release the switch, wait a few sec-
onds, and then try again. Each starting
attempt should be as short as possible to
preserve the battery. Do not crank the
engine more than 10 seconds on any one
attempt. If the engine does not start with the
starter motor, try using the kickstarter.1. Turn the fuel cock to “ON”.
2. Turn the main switch to “ON”.
3. Shift the transmission into neutral.
4. Operate the starter (choke) and completely
close the throttle grip.
5. Slide the “ENGINE STOP” switch to the
“”.
6. Start the engine by pushing the start switch
or by kicking the kickstarter.
7. After the engine starts, warm up for one or
two minutes. Make sure the stater (choke) is
returned to the original position before riding.
STARTING A WARM ENGINE
To start a warm engine, refer to the “Starting a
cold engine” section. The starter (choke)
should not be used. The throttle should be
opened slightly.
CAUTION:
See “Engine break-in Section” prior to
operating engine for the first time.
WARMING UP
To get maximum engine life, always “warm-up”
the engine before starting off. Never accelerate
hard with a cold engine! To see whether or not
the engine is warm, see if it responds to throttle
normally with the stater (choke) turned off.
WARNING
Before starting off, be sure to turn up or
remove the side stand.
Failure to retract the side stand completely
can result in a serious accident when you
try to turn a corner.
ENGINE BREAK-IN
Brake-in is important to better fit the moving
and sliding parts as well as the installed parts.
It is also important to accustom the rider to the
machine better.
Avoid full-throttle run on a new machine for the
first 5 hours.
After the trial run, check for loose parts, oil
leakage and other problems.
Make full inspection and adjustment especially of
slack cables and drive chain and loose spokes.
CAUTION:
After the break-in period, check every fit-
ting and fastener for looseness.
If any loose is found, retighten it securely.

GEN
INFO
ANLASSEN UND
INBETRIEBNAHME
ACHTUNG:
Vor dem Start muss die “Routinekontrolle
vor Fahrtbeginn” ausgeführt werden.
WARNUNG
Den Motor niemals in einem geschlosse-
nen Raum anlassen oder betreiben. Motor-
abgase sind äußerst giftig und führen in
kurzer Zeit zu Bewusstlosigkeit und Tod.
Daher den Motor nur an einem gut belüfte-
ten Ort betreiben.
KALTEN MOTOR ANLASSEN
TT-R90
WARNUNG
Vor dem Anlassen sicherstellen, dass das
Getriebe in der Leerlaufstellung ist.
1. Den Kraftstoffhahn auf “ON” stellen.
2. Den Choke betätigen und den Gasdrehgriff
ganz schließen.
3. Den Motorstoppschalter “ENGINE STOP”
auf “” stellen.
4. Den Kickstarterhebel kräftig durchtreten,
um den Motor anzulassen.
5. Nach dem Anlassen den Motor einige Minu-
ten lang warm laufen lassen. Vor dem Anfah-
ren sicherstellen, dass der Chokehebel in die
Ausgangsstellung zurückgebracht wird.
TT-R90E
WARNUNG
Vor dem Anlassen sicherstellen, dass das
Getriebe in der Leerlaufstellung ist.
HINWEIS:
Das Motorrad ist mit einem Zündunterbre-
chungs- und Anlasssperrschalter-System
ausgerüstet. Der Motor kann nur dann mit
dem E-Starter angelassen werden, wenn
das Getriebe in der Leerlaufstellung ist.
Falls der Motor bei Verwendung des Elektro-
starters nicht sofort anspringt, den Starterschal-
ter freigeben und einige Sekunden bis zum
nächsten Startversuch warten. Um die Batterie
zu schonen, darf der Starterschalter jeweils nur
kurzzeitig betätigt werden. Den Motor niemals
länger als 10 Sekunden drehen. Falls der Motor
nicht mit dem Elektrostarter angelassen werden
kann, den Kickstarter benutzen.1. Den Kraftstoffhahn auf “ON” stellen.
2. Den Zündschlüssel auf “ON” stellen.
3. Das Getriebe in die Leerlaufstellung schalten.
4. Den Choke betätigen und den Gasdrehgriff
ganz schließen.
5. Den Motorstoppschalter “ENGINE STOP”
auf “” stellen.
6. Den Starterschalter drücken oder den Kick-
starterhebel durchtreten, um den Motor
anzulassen.
7. Nach dem Anlassen den Motor einige Minu-
ten lang warm laufen lassen. Vor dem Anfah-
ren sicherstellen, dass der Chokehebel in die
Ausgangsstellung zurückgebracht wird.
WARMEN MOTOR ANLASSEN
Den warmen Motor wie im Abschnitt “Kalten
Motor anlassen” beschrieben anlassen. Aller-
dings sollte der Choke nicht betätigt werden.
Den Gasdrehgriff leicht öffnen.
ACHTUNG:
Vor der ersten Inbetriebnahme unbedingt den
Abschnitt “Einfahrvorschriften” beachten.
MOTOR WARM FAHREN
Den Motor stets warm fahren, um ihm eine lange
Lebensdauer zu gewähren. Bei kaltem Motor
niemals stark beschleunigen! Der Motor ist aus-
reichend warmgefahren, wenn er bei abgeschal-
tetem Choke willig auf Gasgeben anspricht.
WARNUNG
Vor dem Losfahren sicherstellen, dass der
Seitenständer hochgeklappt bzw. abge-
nommen ist.
Ein ausgeklappter Seitenständer kann in
Kurven schwere Stürze verursachen.
EINFAHRVORSCHRIFTEN
Die Einfahrzeit ist wichtig, weil sie den vielen
Bauteilen des Motors erlaubt, sich einzupas-
sen. Außerdem kann der Fahrer sich während
dessen mit seiner Maschine vertraut machen.
Während der ersten fünf Betriebsstunden
unbedingt Vollgas vermeiden.
Nach der Probefahrt die Maschine auf lockere
Schraubverbindungen, Öllecks und andere
Probleme untersuchen.
Die Maschine gründlich kontrollieren und einstel-
len, insbesondere Seilzüge, Antriebskette und
Radspeichen.
ACHTUNG:
Am Ende der Einfahrzeit sicherstellen, dass
sämtliche Schraubverbindungen fest sind.
Bei Lockerheit nachziehen.
ANLASSEN UND INBETRIEBNAHME
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GEN
INFO
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CLEANING AND STORAGE
EC1B0000
CLEANING AND STORAGE
EC1B1000
CLEANING
Frequent cleaning of your machine will
enhance its appearance, maintain good overall
performance, and extend the life of many com-
ponents.
1. Before washing the machine, block off the
end of the exhaust pipe to prevent water
from entering.
2. If the engine is excessively greasy, apply
some degreaser to it with a paint brush. Do
not apply degreaser to the chain, sprock-
ets, or wheel axles.
3. Rinse the dirt and degreaser off with a gar-
den hose; use only enough pressure to do
the job.
CAUTION:
Excessive hose pressure may cause water
seepage and contamination of wheel bear-
ings, front forks, brakes and transmission
seals. Many expensive repair bills have
resulted from improper high pressure
detergent applications such as those avail-
able in coin-operated car washers.
4. After the majority of the dirt has been
hosed off, wash all surfaces with warm
water and a mild detergent. Use an old
toothbrush to clean hard-to-reach places.
5. Rinse the machine off immediately with
clean water, and dry all surfaces with a soft
towel or cloth.
6. Immediately after washing, remove excess
water from the chain with a paper towel
and lubricate the chain to prevent rust.
7. Clean the seat with a vinyl upholstery
cleaner to keep the cover pliable and
glossy.
8. Automotive wax may be applied to all
painted or chromed surfaces. Avoid combi-
nation cleaner-waxes, as they may contain
abrasives.
9. After completing the above, start the
engine and allow it to idle for several min-
utes.
EC182001
STORAGE
If your machine is to be stored for 60 days or
more, some preventive measures must be
taken to avoid deterioration. After cleaning the
machine thoroughly, prepare it for storage as
follows:
1. Drain the fuel tank, fuel lines, and the car-
buretor float bowl.
2. Remove the spark plug, pour a tablespoon
of SAE 10W-30 motor oil in the spark plug
hole, and reinstall the plug. With the engine
stop switch pushed in, kick the engine over
several times to coat the cylinder walls with
oil.
3. Remove the drive chain, clean it thoroughly
with solvent, and lubricate it. Reinstall the
chain or store it in a plastic bag tied to the
frame.
4. Lubricate all control cables.
5. Block the frame up to raise the wheels off
the ground.
6. Tie a plastic bag over the exhaust pipe out-
let to prevent moisture from entering.
7. If the machine is to be stored in a humid or
salt-air environment, coat all exposed
metal surfaces with a film of light oil. Do not
apply oil to rubber parts or the seat cover.
NOTE:
Make any necessary repairs before the
machine is stored.

SPEC
2 - 1
EC200000
SPECIFICATIONS
EC211000
GENERAL SPECIFICATIONS
Model name: TT-R90V (CDN, AUS, NZ)
TT-R90 (Europe, ZA)
TT-R90EV (USA, CDN, AUS, NZ)
TT-R90E (Europe, ZA)
Model code number: TT-R90:
5HNW (Europe, AUS, NZ, ZA)
5HNX (CDN)
TT-R90E:
3P21 (USA)
3P22 (Europe, AUS, NZ, ZA)
3P23 (CDN)
Dimensions:
Overall length 1,525 mm (57.0 in)
Overall width 605 mm (23.8 in)
Overall height 865 mm (34.1 in)
Seat height 625 mm (24.6 in)
Wheelbase 1,040 mm (40.9 in)
Minimum ground clearance 160 mm (6.3 in)
Dry weight:
Without oil and fuel (TT-R90) 60.0 kg (132.3 lb)
(TT-R90E) 63.0 kg (138.9 lb)
Engine:
Engine type Air cooled 4-stroke, SOHC
Cylinder arrangement Single cylinder, forward inclined
Displacement 89 cm
3 (5.43 cu.in)
Bore × stroke 47.0 × 51.8 mm (1.85 × 2.04 in)
Compression ratio 8.5 : 1
Compression pressure (STD) 1,000 kPa (10 kg/cm
2, 145 psi) at 1,000 r/min
Starting system (TT-R90) Kick starter
(TT-R90E) Kick and electric starter
Lubrication system: Wet sump
GENERAL SPECIFICATIONS

SPEC
2 - 2 Oil type or grade:
Engine oil
(For USA and CDN)
At –10 °C (10 °F) or higher È
Yamalube 4 (10W-30) or SAE 10W-30 type
SE/SF/SG motor oil
At 5 °C (40 °F) or higher É
Yamalube 4 (20W-40) or SAE 20W-40 type
SE/SF/SG motor oil
(Except for USA and CDN)
API “SE/SF/SG” or higher grade
Oil capacity:
Engine oil
Periodic oil change 0.8 L (0.70 Imp qt, 0.85 US qt)
Total amount 1.0 L (0.88 Imp qt, 1.06 US qt)
Air filter: Wet type element
Fuel:
Type Unleaded gasoline only (USA, AUS and NZ)
Regular unleaded gasoline only
(CDN, Europe and ZA)
Tank capacity 4.2 L (0.92 Imp gal, 1.11 US gal)
Reserve amount 0.5 L (0.11 Imp gal, 0.13 US gal)
Carburetor:
Type VM16SH
Manufacturer MIKUNI
Spark plug:
Type CR6HSA/U20FSR-U
Manufacturer NGK/DENSO
Gap 0.6 ~ 0.7 mm (0.02 ~ 0.03 in)
Clutch type: Wet, multiple-disc and centrifugal automatic
0 10 30 50 70 90 110 130
-20 -10 01020
30 40 50
È
É
˚F
˚C
GENERAL SPECIFICATIONS
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