2014 YAMAHA TTR50 maintenance

PERIODIC MAINTENANCE AND ADJUSTMENT
7-26
7
EAU24351
Supporting the motorcycleSince this model is not equipped with a
centerstand, follow these precautions
when removing the front and rear
wheel or performing other mainte-
nance requiring the motorcycle to
stand upright. Check that the motorcy-
cle is in a stable and level position be-
fore starting any maintenance. A
strong wooden box can be placed un-
der the engine for added stability.
To service the front wheel
1. Stabilize the rear of the motorcy- cle by using a motorcycle stand
or, if an additional motorcycle
stand is not available, by placing a
jack under the frame in front of the
rear wheel.
2. Raise the front wheel off the ground by using a motorcycle
stand.
To service the rear wheel
Raise the rear wheel off the ground by
using a motorcycle stand or, if a motor-
cycle stand is not available, by placing a jack either under each side of the
frame in front of the rear wheel or under
each side of the swingarm.
EAU24361
Front wheel
EAU56361
To remove the front wheel
WARNING
EWA10822
To avoi
d injury, securely support the
vehicle so there is no dan ger of it
fallin g over.1. Remove the front fork leg guard
from each front fork leg by remov-
ing the bolts.1. Front fork leg guard
2. Bolt
U2CJ81E0.book Page 26 Wednesday, July 10, 2013 3:54 PM

PERIODIC MAINTENANCE AND ADJUSTMENT
7-27
72. Disconnect the brake cable at the
wheel by removing the brake lever
free play adjusting nut at the brake
camshaft lever, then remove the
cable from the brake camshaft le-
ver.
3. Loosen the axle nut. 4. Lift the front wheel off the ground
according to the procedure in the
previous section “Supporting the
motorcycle”.
5. Remove the axle nut and washer.
6. Pull the wheel axle out, and then remove the wheel. To install the front wheel
1. Lift the wheel up between the fork legs.
2. Insert the wheel axle from the right-hand side.
TIPMake sure that the slot in the brake
shoe plate fits over the retainer on the
fork leg.
1. Brake cable
2. Brake camshaft lever
3. Brake lever free play adjusting nut
1. Axle nut
2. Washer
21
1. Wheel axle
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PERIODIC MAINTENANCE AND ADJUSTMENT
7-28
7
3. Lower the front wheel so that it is
on the ground, and then put the
sidestand down.
4. Install the washer and axle nut, and then tighten the axle nut to the
specified torque.
5. Connect the brake cable to the brake camshaft lever, and then in-
stall the brake cable free play ad-
justing nut on the brake cable.
6. Adjust the brake lever free play. (See page 7-15.) 7. While applying the front brake,
push down hard on the handlebar
several times to check for proper
fork operation.
8. Install each front fork leg guard by installing the bolts.
EAU25081
Rear wheel
EAU56731
To remove the rear wheel
WARNING
EWA10822
To avoi d injury, securely support the
vehicle so there is no dan ger of it
fallin g over.1. Loosen the axle nut.
1. Slot
2. RetainerTi ghtenin g torque:
Axle nut: 35 Nm (3.5 m·kgf, 25 ft·lbf)
2
1
1. Axle nut
2. Washer
3. Drive chain slack adjusting nut
4. Locknut
5. Drive chain puller
1
5
4
3
2
U2CJ81E0.book Page 28 Wednesday, July 10, 2013 3:54 PM

PERIODIC MAINTENANCE AND ADJUSTMENT
7-29
72. Remove the brake pedal free play
adjusting nut, and then discon-
nect the brake rod from the brake
camshaft lever.
3. Fully loosen the locknut and drive chain slack adjusting nut on each
end of the swingarm.
4. Lift the rear wheel off the ground according to the procedure on
page 7-26.
5. Remove the axle nut, washer and the drive chain puller at the left-
hand side, then pull the wheel axle
out together with the drive chain
puller from the right-hand side. 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 and
install the wheel.
7. Remove the wheel.
To install the rear wheel 1. Install the drive chain onto the rear sprocket, lift the rear wheel off the
ground, and then install the wheel
by inserting the wheel axle togeth-
er with the drive chain puller from
the right-hand side.TIPMake sure that the slot in the brake
shoe plate fits over the retainer on the
swingarm.2. Install the drive chain puller at theleft-hand side, washer and axle
nut.
1. Brake pedal free play adjusting nut
2. Brake rod
3. Brake camshaft lever
1
2
3
1. Wheel axle
1
1. Slot
2. Retainer
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PERIODIC MAINTENANCE AND ADJUSTMENT
7-30
7
3. Connect the brake rod to the
brake camshaft lever, and then in-
stall the brake pedal free play ad-
justing nut onto the brake rod.
4. Lower the rear wheel so that it is on the ground, and then put the
sidestand down.
5. Adjust the drive chain slack. (See page 7-18.)
6. Tighten the axle nut to the speci- fied torque.
7. Adjust the brake pedal free play. (See page 7-16.)
EAU25852
Trou bleshootin gAlthough Yamaha motorcycles receive
a thorough inspection before shipment
from the factory, trouble may occur
during 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
inferior, have a shorter service life and
can lead to expensive repair bills.
WARNING
EWA15142
When checkin g the fuel system, d o
not smoke, an d make sure there are
no open flames or sparks in the ar-
ea, inclu din g pilot li ghts from water heaters or furnaces. Gasoline or
g
asoline vapors can i gnite or ex-
plo de, causin g severe injury or prop-
erty damag e.
Tightenin g torque:
Axle nut: 60 Nm (6.0 m·kgf, 43 ft·lbf)
U2CJ81E0.book Page 30 Wednesday, July 10, 2013 3:54 PM

PERIODIC MAINTENANCE AND ADJUSTMENT
7-31
7
EAU25905
Troubleshootin g chart
Check the fuel level in
the fuel tank.1. Fuel
There is enough fuel.
There is no fuel.
Check the battery.
Supply fuel.
The engine does not start.
Check the battery.
The engine does not start.
Have a Yamaha dealer check the vehicle.
Operate the electric starter.4. Compression
There is compression.
There is no compression.
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.
Have a Yamaha dealer check the vehicle.
The engine does not start.
Check the compression.
The engine does not start.
Check the ignition.
Operate the electric starter.2. Battery
The engine turns over
quickly.
The engine turns over
slowly.
The battery is good.Check the battery lead connections,
and have a Yamaha dealer charge
the battery if necessary.
DryWet
Open the throttle halfway and operate
the electric starter.
U2CJ81E0.book Page 31 Wednesday, July 10, 2013 3:54 PM

INDEXAAir filter element, cleaning ...................... 7-8BBattery .................................................. 7-23
Brake lever .............................................. 4-3
Brake lever, checking and lubricating ........................................... 7-20
Brake lever free play, adjusting ............ 7-15
Brake pedal............................................. 4-3
Brake pedal, checking and lubricating ........................................... 7-21
Brake pedal free play, adjusting ........... 7-16
Brake shoes, checking ......................... 7-17CCables, checking and lubricating ......... 7-20
Carburetor, adjusting ............................ 7-11
Care ........................................................ 8-1
Clutch free play, adjusting .................... 7-15DDrive chain, cleaning and lubricating .... 7-19
Drive chain slack................................... 7-18EEngine break-in....................................... 6-3
Engine idling speed .............................. 7-11
Engine oil ................................................ 7-7
Engine, starting a warm .......................... 6-2
Engine stop switch ................................. 4-2FFront fork, checking .............................. 7-22
Fuel ......................................................... 4-4
Fuel cock ................................................ 4-7
Fuel tank breather hose .......................... 4-6
Fuel tank cap .......................................... 4-4
Fuse, replacing ..................................... 7-25
HHandlebar switches ................................ 4-1IIdentification numbers .......................... 10-1LLabels, location ...................................... 1-1MMain switch ............................................ 4-1
Maintenance and lubrication, periodic ... 7-3
Maintenance, emission control
system.................................................. 7-2
Matte color, caution ............................... 8-1
Model label ........................................... 10-1PParking ................................................... 6-4
Part locations ......................................... 3-1SSafety information .................................. 2-1
Seat ........................................................ 4-8
Shifting ................................................... 6-2
Shift pedal .............................................. 4-3
Shift pedal, checking ............................ 7-17
Sidestand ............................................... 4-9
Sidestand, checking an d lubricating .... 7-21
Spark arrester, cleaning ....................... 7-10
Spark plug, checking.............................. 7-6
Specifications ......................................... 9-1
Speed limiter .......................................... 4-2
Starter (choke) lever ............................... 4-8
Starting and warming up a cold engine .................................................. 6-1
Starting circuit cut-off system ................ 4-9
Start switch ............................................ 4-2
Steering, checking................................ 7-22 Storage ...................................................8-3
Supporting the motorcycle ...................7-26
Swingarm pivots, lubricating ................7-21
TThrottle grip and cable, checking and
lubricating ...........................................7-20
Throttle grip free play, checking ...........7-12
Tires ......................................................7-13
Troubleshooting ....................................7-30
Troubleshooting chart ...........................7-31VValve clearance .....................................7-12
Vehicle Emission Control Information label (For Canada)...............................10-2
Vehicle identification number ................10-1WWheel bearings, checking .....................7-23
Wheel (front) ..........................................7-26
Wheel (rear) ...........................................7-28
Wheels ..................................................7-14
U2CJ81E0.book Page 1 Wednesday, July 10, 2013 3:54 PM