2009 YAMAHA TTR50 maintenance

PERIODIC MAINTENANCE AND ADJUSTMENT
6-28
6
EAU25080
Rear wheel
EAU39771
To remove the rear wheel
WARNING
EWA10821
To avoid injury, securely support the
vehicle so there is no danger of itfalling over.
1. Loosen the axle nut.
2. Remove the brake pedal free play
adjusting nut, and then disconnect
the brake rod from the brake cam-
shaft lever.3. Loosen the locknut and drive chain
adjusting nut on each end of the
swingarm.
4. Lift the rear wheel off the ground
according to the procedure on
page 6-25.
5. Remove the axle nut and washer,
then pull the wheel axle out.6. Push the wheel forward, and then
remove the drive chain from the
rear sprocket.
TIPThe drive chain does not need to be
disassembled in order to remove andinstall the wheel.
1. Axle nut
2. Washer
3. Drive chain slack adjusting nut
4. Locknut
1
4
3
2
1. Brake pedal free play adjusting nut
2. Brake rod
3. Brake camshaft lever
1
2
3
1. Wheel axle
U1P683E0.book Page 28 Tuesday, April 29, 2008 2:05 PM

PERIODIC MAINTENANCE AND ADJUSTMENT
6-29
67. Remove the wheel.
EAU39781
To install the rear wheel
1. Install the drive chain onto the rear
sprocket, and then install the
wheel by inserting the wheel axle
from the right-hand side.TIPMake sure that the slot in the brake
shoe plate fits over the retainer on theswingarm.
2. Connect the brake rod to the brake
camshaft lever, and then install the
brake pedal free play adjusting nut
onto the brake rod.3. Adjust the drive chain slack. (See
page 6-17.)
4. Install the washer and axle nut,
and then lower the rear wheel so
that it is on the ground.
5. Tighten the axle nut to the speci-
fied torque.
6. Adjust the brake pedal free play.
(See page 6-16.)
EAU25851
Troubleshooting Although Yamaha motorcycles receive
a thorough inspection before shipment
from the factory, trouble may occur dur-
ing operation. Any problem in the fuel,
compression, or ignition systems, for
example, can cause poor starting and
loss of power.
The following troubleshooting chart
represents a quick and easy procedure
for checking these vital systems your-
self. However, should your motorcycle
require any repair, take it to a Yamaha
dealer, whose skilled technicians have
the necessary tools, experience, and
know-how to service the motorcycle
properly.
Use only genuine Yamaha replace-
ment parts. Imitation parts may look like
Yamaha parts, but they are often inferi-
or, have a shorter service life and can
lead to expensive repair bills.
WARNING
EWA15141
When checking the fuel system, do
not smoke, and make sure there are
no open flames or sparks in the ar-
ea, including pilot lights from water
1. Slot
2. Retainer
Tightening torque:
Axle nut:
60 Nm (6.0 m·kgf, 43 ft·lbf)
U1P683E0.book Page 29 Tuesday, April 29, 2008 2:05 PM

PERIODIC MAINTENANCE AND ADJUSTMENT
6-30
6 heaters or furnaces. Gasoline or
gasoline vapors can ignite or ex-
plode, causing severe injury or
property damage.
U1P683E0.book Page 30 Tuesday, April 29, 2008 2:05 PM

PERIODIC MAINTENANCE AND ADJUSTMENT
6-31
6
EAU25902
Troubleshooting chart
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 plug
and check the electrodes.3. Ignition
Wipe off with a dry cloth and correct the
spark plug gap, or replace the spark plug.
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
Open the throttle halfway and operate
the electric starter.
U1P683E0.book Page 31 Tuesday, April 29, 2008 2:05 PM

INDEXAAir filter element, cleaning....................... 6-8BBattery................................................... 6-23
Brake lever .............................................. 3-3
Brake lever, checking and lubricating ... 6-20
Brake lever free play, adjusting............. 6-15
Brake pedal ............................................. 3-3
Brake pedal, checking and
lubricating ........................................... 6-21
Brake pedal free play, adjusting............ 6-16
Brake shoes, checking .......................... 6-17CCables, checking and lubricating .......... 6-20
Carburetor, adjusting ............................ 6-10
Care ........................................................ 7-1
Clutch free play, adjusting..................... 6-14DDrive chain, cleaning and lubricating .... 6-19
Drive chain slack ................................... 6-17EEngine break-in ....................................... 5-3
Engine idling speed............................... 6-11
Engine oil ................................................ 6-6
Engine, starting a warm .......................... 5-2
Engine stop switch .................................. 3-2FFront fork, checking .............................. 6-22
Fuel ......................................................... 3-4
Fuel cock................................................. 3-6
Fuel tank breather hose .......................... 3-6
Fuel tank cap .......................................... 3-4
Fuse, replacing ..................................... 6-25
HHandlebar switches ................................ 3-1IIdentification numbers ............................ 9-1KKey identification number ....................... 9-1MMain switch ............................................. 3-1
Maintenance and lubrication, periodic .... 6-3
Maintenance, emission control system... 6-2
Matte color, caution ................................ 7-1
Model label ............................................. 9-2PParking ................................................... 5-4
Part locations .......................................... 2-1
Pre-operation check list .......................... 4-2SSafety information................................... 1-1
Seat ........................................................ 3-7
Shifting.................................................... 5-2
Shift pedal............................................... 3-3
Shift pedal, checking ............................ 6-16
Sidestand................................................ 3-8
Sidestand, checking and lubricating ..... 6-21
Spark arrester, cleaning ......................... 6-9
Spark plug, checking .............................. 6-5
Specifications ......................................... 8-1
Speed limiter........................................... 3-2
Starter (choke) lever ............................... 3-7
Starting and warming up a cold
engine .................................................. 5-1
Starting circuit cut-off system ................. 3-8
Start switch ............................................. 3-2
Steering, checking ................................ 6-22Storage.................................................... 7-3
Supporting the motorcycle .................... 6-25
Swingarm pivots, lubricating ................. 6-21
TThrottle cable free play, adjusting ......... 6-11
Throttle grip and cable, checking and
lubricating ........................................... 6-20
Tires ...................................................... 6-12
Troubleshooting .................................... 6-29
Troubleshooting chart ........................... 6-31VValve clearance..................................... 6-12
Vehicle identification number .................. 9-1WWheel bearings, checking ..................... 6-23
Wheel (front) ......................................... 6-26
Wheel (rear) .......................................... 6-28
Wheels .................................................. 6-14
U1P683E0.book Page 1 Tuesday, April 29, 2008 2:05 PM