YAMAHA TTR50 2010 Repair Manual

PERIODIC MAINTENANCE AND ADJUSTMENT
7-19
7 2. To tighten the drive chain, turn the
drive chain slack adjusting nut at
each end of the swingarm in direc-
tion (a). To loosen the drive chain,
turn the adjusting nut at each end
of the swingarm in direction (b),
and then push the rear wheel for-
ward. NOTICE: Improper drive
chain slack will overload the en-
gine as well as other vital parts
of the motorcycle and can lead
to chain slippage or breakage.
To prevent this from occurring,
keep the drive chain slack with-
in the specified limits.
[ECA10571]
TIPUsing the alignment marks on each
side of the swingarm, make sure that
both adjusting nuts are in the same po-
sition for proper wheel alignment.3. Tighten both locknuts and the axle
nut to the specified torques.4. Adjust the brake pedal free play.
(See page 7-16.)
1. Brake pedal free play adjusting nut
2. Drive chain slack adjusting nut
3. Locknut
1
2
3
1. Axle nut
2. Locknut
3. Drive chain slack adjusting nut
4. Alignment marks
Tightening torques:
Locknut:
7 Nm (0.7 m·kgf, 5.1 ft·lbf)
Axle nut:
60 Nm (6.0 m·kgf, 43 ft·lbf)1(b) 4(a)
2
3
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PERIODIC MAINTENANCE AND ADJUSTMENT
7-20
7
EAU23014
Cleaning and lubricating the
drive chain The drive chain must be cleaned and
lubricated at the intervals specified in
the periodic maintenance and lubrica-
tion chart, otherwise it will quickly wear
out, especially when riding in dusty or
wet areas. Service the drive chain as
follows.NOTICE
ECA10582
The drive chain must be lubricated
after washing the motorcycle and
riding in the rain or wet areas.1. Remove all dirt and mud from the
drive chain with a brush or cloth.TIPFor a thorough cleaning, have a
Yamaha dealer remove the drive chain
and soak it in solvent.2. Spray Yamaha Chain and Cable
Lube or a high-quality spray-type
drive chain lubricant on both sides
and on the middle of the chain,making sure that all side plates
and rollers have been sufficiently
oiled.
EAU23093
Checking and lubricating the
cables The operation of all control cables and
the condition of the cables should be
checked before each ride, and the ca-
bles and cable ends should be lubricat-
ed if necessary. If a cable is damaged
or does not move smoothly, have a
Yamaha dealer check or replace it.
WARNING! Damage to the outer
housing of cables may result in in-
ternal rusting and cause interfer-
ence with cable movement. Replace
damaged cables as soon as possi-
ble to prevent unsafe conditions.[EWA10711]Recommended lubricant:
Yamaha Chain and Cable Lube or
engine oil
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PERIODIC MAINTENANCE AND ADJUSTMENT
7-21
7
EAU23111
Checking and lubricating the
throttle grip and cable The operation of the throttle grip should
be checked before each ride. In addi-
tion, the cable should be lubricated at
the intervals specified in the periodic
maintenance chart.
EAU43622
Checking and lubricating the
brake lever The operation of the brake lever should
be checked before each ride, and the
lever pivot should be lubricated if nec-
essary.
EAU23182
Checking and lubricating the
brake pedal The operation of the brake pedal
should be checked before each ride,
and the pedal pivot should be lubricat-
ed if necessary.
Recommended lubricant:
Lithium-soap-based grease
Recommended lubricant:
Lithium-soap-based grease
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PERIODIC MAINTENANCE AND ADJUSTMENT
7-22
7
EAU23202
Checking and lubricating the
sidestand The operation of the sidestand should
be checked before each ride, and the
sidestand pivot and metal-to-metal
contact surfaces should be lubricated if
necessary.
WARNING
EWA10731
If the sidestand does not move up
and down smoothly, have a Yamaha
dealer check or repair it. Otherwise,
the sidestand could contact the
ground and distract the operator, re-
sulting in a possible loss of control.
EAUM1650
Lubricating the swingarm piv-
ots The swingarm pivots must be lubricat-
ed at the intervals specified in the peri-
odic maintenance and lubrication chart.
EAU42081
Checking the front fork The condition and operation of the front
fork must be checked as follows at the
intervals specified in the periodic main-
tenance and lubrication chart.
To check the condition
Check the inner tubes for scratches
and damage.
To check the operation
1. Place the vehicle on a level sur-
face and hold it in an upright posi-
tion. WARNING! To avoid injury,
securely support the vehicle so
there is no danger of it falling
over.
[EWA10751]
2. While applying the front brake,
push down hard on the handlebars
several times to check if the front
fork compresses and rebounds
smoothly.
Recommended lubricant:
Lithium-soap-based grease
Recommended lubricant:
Lithium-soap-based grease
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PERIODIC MAINTENANCE AND ADJUSTMENT
7-23
7
NOTICE
ECA10590
If any damage is found or the front
fork does not operate smoothly,
have a Yamaha dealer check or re-
pair it.
EAU23283
Checking the steering Worn or loose steering bearings may
cause danger. Therefore, the operation
of the steering must be checked as fol-
lows at the intervals specified in the pe-
riodic maintenance and lubrication
chart.
1. Place a stand under the engine to
raise the front wheel off the
ground. (See page 7-26 for more
information.) WARNING! To
avoid injury, securely support
the vehicle so there is no danger
of it falling over.
[EWA10751]
2. Hold the lower ends of the front
fork legs and try to move them for-
ward and backward. If any free
play can be felt, have a Yamaha
dealer check or repair the steering.
EAU23290
Checking the wheel bearings The front and rear wheel bearings must
be checked at the intervals specified in
the periodic maintenance and lubrica-
tion chart. If there is play in the wheel
hub or if the wheel does not turn
smoothly, have a Yamaha dealer check
the wheel bearings.
U1P684E0.book Page 23 Tuesday, April 28, 2009 10:22 AM

PERIODIC MAINTENANCE AND ADJUSTMENT
7-24
7
EAU40444
Battery This model is equipped with a VRLA
(Valve Regulated Lead Acid) battery.
There is no need to check the electro-
lyte or to add distilled water. However,
the battery coupler connection needs to
be checked to make sure that it is se-
curely connected.
WARNING
EWA10760


Electrolyte is poisonous and
dangerous since it contains sul-
furic acid, which causes severe
burns. Avoid any contact with
skin, eyes or clothing and al-
ways shield your eyes when
working near batteries. In case
of contact, administer the fol-
lowing FIRST AID.
EXTERNAL: Flush with plenty
of water.
INTERNAL: Drink large quan-
tities of water or milk and im-
mediately call a physician.
EYES: Flush with water for 15
minutes and seek prompt
medical attention.


Batteries produce explosive hy-
drogen gas. Therefore, keep
sparks, flames, cigarettes, etc.,
away from the battery and pro-
vide sufficient ventilation when
charging it in an enclosed
space.


KEEP THIS AND ALL BATTER-
IES OUT OF THE REACH OF
CHILDREN.
To remove the battery
1. Remove the seat. (See page 4-7.)
2. Remove the battery cover by re-
moving the bolts.3. Unhook the battery band, and then
pull the battery out of the battery
compartment.
4. Disconnect the battery coupler.
To install the battery
1. Connect the battery coupler.
2. Place the battery in the original po-
sition, and then hook the battery
band onto the holder.
3. Install the battery cover by install-
ing the bolts.
4. Install the seat.1. Bolt
2. Battery
3. Battery cover
1. Battery
2. Battery band
3. Battery coupler
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PERIODIC MAINTENANCE AND ADJUSTMENT
7-25
7 To charge the battery
Have a Yamaha dealer charge the bat-
tery as soon as possible if it seems to
have discharged. Keep in mind that the
battery tends to discharge more quickly
if the vehicle is equipped with optional
electrical accessories.
NOTICE
ECA16520
To charge a VRLA (Valve Regulated
Lead Acid) battery, a special (con-
stant-voltage) battery charger is re-
quired. Using a conventional battery
charger will damage the battery. If
you do not have access to a con-
stant-voltage battery charger, have a
Yamaha dealer charge your battery.To store the battery
1. If the vehicle will not be used for
more than one month, remove the
battery, fully charge it, and then
place it in a cool, dry place.
NOTICE: When removing the
battery, be sure the key is
turned to “OFF” before discon-
necting the coupler.
[ECA16322]
2. If the battery will be stored for more
than two months, check it at least
once a month and fully charge it if
necessary.
3. Fully charge the battery before in-
stallation.NOTICE
ECA16530
Always keep the battery charged.
Storing a discharged battery can
cause permanent battery damage.
EAU42023
Replacing the fuse The fuse is located inside the battery
coupler. (See page 7-24.)
If the fuse is blown, replace it as fol-
lows.
1. Turn the key to “OFF” and turn off
all electrical circuits.
2. Disconnect the battery coupler.
3. Remove the blown fuse, and then
install a new fuse of the specified
amperage. WARNING! Do not
use a fuse of a higher amperage
rating than recommended to
avoid causing extensive dam-
age to the electrical system and
possibly a fire.
[EWA15131]
1. Fuse
2. Spare fuse
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PERIODIC MAINTENANCE AND ADJUSTMENT
7-26
74. Connect the battery coupler.
5. Turn the key to “ON”.
6. If the fuse immediately blows
again, have a Yamaha dealer
check the electrical system.
EAU24350
Supporting the motorcycle Since this model is not equipped with a
centerstand, follow these precautions
when removing the front and rear
wheel or performing other maintenance
requiring the motorcycle to stand up-
right. Check that the motorcycle is in a
stable and level position before starting
any maintenance. A strong wooden
box can be placed under the engine for
added stability.
To service the front wheel
1. Stabilize the rear of the motorcycle
by using a motorcycle stand or, if
an additional motorcycle stand is
not available, by placing a jack un-
der 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 placinga jack either under each side of the
frame in front of the rear wheel or under
each side of the swingarm.
Specified fuse:
10.0 A
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PERIODIC MAINTENANCE AND ADJUSTMENT
7-27
7
EAU24360
Front wheel
EAU39792
To remove the front wheel
WARNING
EWA10821
To avoid injury, securely support the
vehicle so there is no danger of it
falling over.1. Remove the guard from each front
fork leg by removing the bolts.
2. Disconnect the brake cable at the
wheel by removing the brake lever
free play adjusting nut at the brakecamshaft 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 on
page 7-26.
5. Remove the axle nut and washer.
6. Pull the wheel axle out, and then
remove the wheel.
EAU39802
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. Front fork leg guard
2. Bolt
1. Brake cable
2. Brake camshaft lever
3. Brake lever free play adjusting nut
1. Axle nut
2. Washer
1. Wheel axle
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PERIODIC MAINTENANCE AND ADJUSTMENT
7-28
73. 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 7-16.)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.
EAU25080
Rear wheel
EAU39772
To remove the rear wheel
WARNING
EWA10821
To avoid injury, securely support the
vehicle so there is no danger of it
falling 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.
1. Slot
2. RetainerTightening 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
U1P684E0.book Page 28 Tuesday, April 28, 2009 10:22 AM