2007 YAMAHA TTR90 stop start

DESCRIPTION
2-1
2
EAU10410
Left view1. Fuel cock (page 3-5)
2. Starter (choke) lever (page 3-6)
3. Battery [TT-R90E(W)] (page 6-24)
4. Engine oil drain bolt (page 6-8)
5. Shift pedal (page 3-2)
6. Throttle stop screw (page 6-13)
U3P281E0.book Page 1 Monday, April 17, 2006 11:26 AM

INSTRUMENT AND CONTROL FUNCTIONS
3-1
3
EAU40340
Main switch [TT-R90E(W)]The main switch controls the ignition
system. The main switch positions are
described below.
EAU10630
ON
All electrical systems are supplied with
power, and the engine can be started.
The key cannot be removed.
EAU10660
OFF
All electrical systems are off. The key
can be removed.
EAU12346
Handlebar switches Left
Right [TT-R90E(W)]
EAU41890
Engine stop switch “/”
[TT-R90(W)]
Set this switch to “” before starting
the engine. Set this switch to “” to
stop the engine.
EAU12660
Engine stop switch “/”
[TT-R90E(W)]
Set this switch to “” before starting
the engine. Set this switch to “” to
stop the engine in case of an emergen-
cy, such as when the vehicle overturns
or when the throttle cable is stuck.
EAU12710
Start switch “” [TT-R90E(W)]
Push this switch to crank the engine
with the starter.CAUTION:
ECA10050
See page 5-2 for starting instruc-tions prior to starting the engine.
1. Engine stop switch “/”
1. Start switch “”
U3P281E0.book Page 1 Monday, April 17, 2006 11:26 AM

INSTRUMENT AND CONTROL FUNCTIONS
3-9
3
With the engine turned off:
1. Make sure that the engine stop switch is set to “
”.
2. Turn the key to “ON”.
3. Shift the transmission into gear.
4. Keep the front or rear brake applied.
5. Push the start switch.
Does the engine start?
The neutral switch may be defective.
The motorcycle should not be ridden until
checked by a Yamaha dealer.
6. Shift the transmission into the neutral position.
7. Push the start switch.
Does the engine start?
The neutral switch may be defective.
The motorcycle should not be ridden until
checked by a Yamaha dealer.
YES
NOTE:
a warmed-up engine.
NO
The system is OK. The motorcycle can be ridden.
YES
NO
This check is most reliable if performed with
U3P281E0.book Page 9 Monday, April 17, 2006 11:26 AM

OPERATION AND IMPORTANT RIDING POINTS
5-1
5
EAU41680
WARNING
EWA14620


This model is designed for off-
road use only. Become thor-
oughly familiar with all operat-
ing controls and their functions
before riding. Consult a Yamaha
dealer regarding any control or
function that you do not thor-
oughly understand.


Never start the engine or oper-
ate it in a closed area for any
length of time. Exhaust fumes
are poisonous, and inhaling
them can cause loss of con-
sciousness and death within a
short time. Always make sure
that there is adequate ventila-
tion.


Before starting out, make sure
that the sidestand is up. If the
sidestand is not raised com-
pletely, it could contact the
ground and distract the opera-
tor, resulting in a possible lossof control.
EAU41670
Starting and warming up a
cold engine [TT-R90(W)]1. Turn the fuel cock lever to “ON”.
2. Set the engine stop switch to “”.
3. Shift the transmission into the neu-
tral position.
WARNING
EWA14410


Be sure to shift the transmis-
sion into neutral before starting
the engine.


Never ride with the sidestanddown.
4. Turn the starter (choke) on and
completely close the throttle. (See
page 3-6.)
5. Start the engine by pushing the
kickstarter lever down.
CAUTION:
ECA11130
For maximum engine life, always
warm the engine up before starting
off. Never accelerate hard when theengine is cold!
6. When the engine is warm, turn the
starter (choke) off.
NOTE:The engine is warm when it responds
normally to the throttle with the starter(choke) turned off.
U3P281E0.book Page 1 Monday, April 17, 2006 11:26 AM

OPERATION AND IMPORTANT RIDING POINTS
5-2
5
EAU40090
Starting and warming up a
cold engine [TT-R90E(W)]1. Turn the fuel cock lever to “ON”.
2. Turn the key to “ON” and make
sure that the engine stop switch is
set to “”.
3. Shift the transmission into the neu-
tral position.
WARNING
EWA14410


Be sure to shift the transmis-
sion into neutral before starting
the engine.


Never ride with the sidestanddown.
4. Turn the starter (choke) on and
completely close the throttle. (See
page 3-6.)
5. Start the engine by pushing the
start switch.
6. After starting the engine, move the
starter (choke) back halfway.
CAUTION:
ECA11130
For maximum engine life, always
warm the engine up before starting
off. Never accelerate hard when theengine is cold!
7. When the engine is warm, turn the
starter (choke) off.NOTE:The engine is warm when it responds
normally to the throttle with the starter(choke) turned off.
EAU16640
Starting a warm engine Follow the same procedure as for start-
ing a cold engine with the exception
that the starter (choke) is not required
when the engine is warm.
U3P281E0.book Page 2 Monday, April 17, 2006 11:26 AM

OPERATION AND IMPORTANT RIDING POINTS
5-3
5
EAU39901
Shifting This motorcycle has a 3-speed trans-
mission with a centrifugal, automatic
clutch. Shifting gears lets you control
the amount of engine power available
for starting off, accelerating, climbing
hills, etc.
The gear positions are shown in the il-
lustration.NOTE:To shift the transmission into the neu-
tral position, press the shift pedal down
repeatedly until it reaches the end of itstravel.
CAUTION:
ECA15441


Even with the transmission in
the neutral position, do not
coast for long periods of time
with the engine off, and do not
tow the motorcycle for long dis-
tances. The transmission is
properly lubricated only when
the engine is running. Inade-
quate lubrication may damage
the transmission.


Always release the throttle grip
before changing gears to avoid
damaging the engine, transmis-
sion, and drive train, which are
not designed to withstand the
shock of shifting when the throt-tle grip is open.
EAU39910
To start out and accelerate
1. Close the throttle.
2. Shift into first gear and release the
shift pedal.
CAUTION:
ECA15460
Always close the throttle before
shifting gears, otherwise damage to
the engine and drive train may re-sult.
3. Open the throttle gradually.
4. Once the motorcycle has reached
a speed high enough to change
gears, close the throttle.
5. Shift into second gear and release
the shift pedal.
6. Open the throttle gradually.
7. Follow the same procedure when
shifting to the next higher gear.
EAU16710
To decelerate
1. Close the throttle and apply both
the front and the rear brakes to
slow the motorcycle.
2. Downshift through the gears and
shift the transmission into the neu-
tral position when the motorcycle
is almost completely stopped.
1. Shift pedal
2. Neutral positionU3P281E0.book Page 3 Monday, April 17, 2006 11:26 AM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-13
6
EAU39930
Adjusting the carburetor The carburetor is an important part of
the engine and requires very sophisti-
cated adjustment. Therefore, most car-
buretor adjustments should be left to a
Yamaha dealer, who has the neces-
sary professional knowledge and expe-
rience. The adjustment described in the
following section, however, may be ser-
viced by the owner as part of routine
maintenance.CAUTION:
ECA10550
The carburetor has been set and ex-
tensively tested at the Yamaha fac-
tory. Changing these settings
without sufficient technical knowl-
edge may result in poor perfor-mance of or damage to the engine.
EAU21360
Adjusting the engine idling
speed The engine idling speed must be
checked and, if necessary, adjusted as
follows at the intervals specified in the
periodic maintenance and lubrication
chart.NOTE:
A diagnostic tachometer is needed tomake this adjustment.
1. Attach the tachometer to the spark
plug lead.
2. Start the engine and warm it up for
several minutes at 1000–2000
r/min while occasionally revving it
to 4000–5000 r/min.NOTE:The engine is warm when it quickly re-sponds to the throttle.
3. Check the engine idling speed
and, if necessary, adjust it to spec-
ification by turning the throttle stop
screw. To increase the engine
idling speed, turn the screw in di-rection (a). To decrease the en-
gine idling speed, turn the screw in
direction (b).
NOTE:
If the specified idling speed cannot be
obtained as described above, have aYamaha dealer make the adjustment.1. Throttle stop screw
Engine idling speed:
1400–1600 r/min
U3P281E0.book Page 13 Monday, April 17, 2006 11:26 AM

INDEX
AAccessories and replacement parts ..... 6-16
Air filter element, cleaning .................... 6-10BBattery [TT-R90E(W)] ........................... 6-24
Brake and shift pedals, checking and
lubricating ........................................... 6-21
Brake lever ............................................. 3-2
Brake lever, checking and lubricating ... 6-22
Brake lever free play, adjusting ............ 6-17
Brake pedal ............................................ 3-2
Brake pedal free play, adjusting ........... 6-17
Brake shoes, checking ......................... 6-18CCables, checking and lubricating .......... 6-21
Carburetor, adjusting ............................ 6-13
Care ........................................................ 7-1
Cowling and panel, removing and
installing ............................................... 6-6DDrive chain, cleaning and lubricating .... 6-20
Drive chain slack .................................. 6-18EEngine break-in ...................................... 5-4
Engine idling speed .............................. 6-13
Engine oil ................................................ 6-8
Engine, starting a warm .......................... 5-2
Engine stop switch [TT-R90E(W)] .......... 3-1
Engine stop switch [TT-R90(W)]............. 3-1FFront fork, checking .............................. 6-23
Fuel......................................................... 3-3
Fuel cock ................................................ 3-5
Fuel tank breather hose.......................... 3-4Fuel tank cap........................................... 3-3
Fuse, replacing [TT-R90E(W)] ..............6-26
HHandlebar switches ................................. 3-1IIdentification numbers ............................. 9-1KKey identification number
[TT-R90E(W)]........................................ 9-1
Kickstarter ............................................... 3-6LLabels, location of ...................................1-4MMain switch [TT-R90E(W)] ...................... 3-1
Maintenance and lubrication, periodic..... 6-4
Maintenance, emission control system ... 6-3
Maintenance, periodic ............................. 6-1
Model label .............................................. 9-2PParking [TT-R90E(W)].............................5-5
Parking [TT-R90(W)] ...............................5-4
Part locations .......................................... 2-1
Pre-operation check list........................... 4-2SSafety information ...................................1-1
Seat ......................................................... 3-7
Shifting ....................................................5-3
Shift pedal ............................................... 3-2
Sidestand ................................................ 3-7
Sidestand, checking and lubricating...... 6-22
Spark arrester, cleaning ........................ 6-12
Spark plug, checking ...............................6-7
Specifications .......................................... 8-1
Starter (choke) lever................................ 3-6Starting and warming up a cold engine
[TT-R90E(W)] ....................................... 5-2
Starting and warming up a cold engine
[TT-R90(W)].......................................... 5-1
Starting circuit cut-off system
[TT-R90E(W)] ....................................... 3-8
Start switch [TT-R90E(W)] ...................... 3-1
Steering, checking ................................ 6-23
Storage [TT-R90E(W)] ............................ 7-4
Storage [TT-R90(W)] .............................. 7-3
Supporting the motorcycle .................... 6-26
Swingarm pivots, lubricating ................. 6-22
TThrottle cable free play, adjusting ......... 6-14
Throttle grip and cable, checking
and lubricating .................................... 6-21
Tires ...................................................... 6-15
Tool kit .................................................... 6-2
Troubleshooting .................................... 6-30
Troubleshooting chart [TT-R90E(W)].... 6-32
Troubleshooting chart [TT-R90(W)] ...... 6-31VValve clearance .................................... 6-14
Vehicle identification number .................. 9-1WWheel bearings, checking..................... 6-24
Wheel (front) ......................................... 6-27
Wheel (rear) .......................................... 6-28
Wheels .................................................. 6-16
U3P281E0.book Page 1 Monday, April 17, 2006 11:26 AM