2009 YAMAHA TTR50 warning

PERIODIC MAINTENANCE AND ADJUSTMENT
6-13
6Tire inspection
The tires must be checked before each
ride. If the center tread depth reaches
the specified limit, if the tire has a nail or
glass fragments in it, or if the sidewall is
cracked, have a Yamaha dealer re-
place the tire immediately.Tire information
This motorcycle is equipped with spoke
wheels and tube tires.
WARNING
EWA10461
The front and rear tires should be of
the same make and design, other-
wise the handling characteristics of
the vehicle may be different, whichcould lead to an accident.
After extensive tests, only the tires list-
ed below have been approved for this
model by Yamaha Motor Co., Ltd.
WARNING
EWA14390


Have a Yamaha dealer replace
excessively worn tires. Operat-
ing the motorcycle with exces-sively worn tires decreases
riding stability and can lead to
loss of control.


The replacement of all wheel-
and brake-related parts, includ-
ing the tires, should be left to a
Yamaha dealer, who has the
necessary professional knowl-
edge and experience.


It is not recommended to patch
a punctured tube. If unavoid-
able, however, patch the tube
very carefully and replace it as
soon as possible with a high-quality product.
Standard tire air pressure:
Fr o nt :
100 kPa (1.00 kgf/cm², 15 psi)
Rear:
100 kPa (1.00 kgf/cm², 15 psi)1. Tire sidewall
2. Tire tread depthMinimum tire tread depth (front and
rear):
4.0 mm (0.16 in)
12
Front tire:
Size:
2.50-10 4PR
Manufacturer/model:
CHENG SHIN/KNOBBY
Rear tire:
Size:
2.50-10 4PR
Manufacturer/model:
CHENG SHIN/KNOBBY
U1P683E0.book Page 13 Tuesday, April 29, 2008 2:05 PM

PERIODIC MAINTENANCE AND ADJUSTMENT
6-15
6
TIPWhen tightening the locknut, hold the
clutch adjusting screw with a screwdriv-
er so that it does not turn together withthe locknut.
5. Install the clutch adjusting screw
cover by installing the screws.
EAU22130
Adjusting the brake lever free
play The brake lever free play should mea-
sure 10.0–20.0 mm (0.39–0.79 in) as
shown. Periodically check the brake le-
ver free play and, if necessary, adjust it
as follows.
To increase the brake lever free play,
turn the adjusting nut at the brake shoe
plate in direction (a). To decrease the
brake lever free play, turn the adjusting
nut in direction (b).
WARNING
EWA10650
If proper adjustment cannot be ob-
tained as described, have a Yamahadealer make this adjustment.
1. Brake lever free play
1
1. Brake lever free play adjusting nut
1
(a)
(b)
U1P683E0.book Page 15 Tuesday, April 29, 2008 2:05 PM

PERIODIC MAINTENANCE AND ADJUSTMENT
6-16
6
EAU44670
Adjusting the brake pedal free
play The brake pedal free play should mea-
sure 10.0–20.0 mm (0.39–0.79 in) at
the brake pedal end as shown. Period-
ically check the brake pedal free play
and, if necessary, adjust it as follows.
To increase the brake pedal free play,
turn the adjusting nut at the brake rod in
direction (a). To decrease the brake
pedal free play, turn the adjusting nut in
direction (b).
WARNING
EWA14820


After adjusting the drive chain
slack or removing and installing
the rear wheel, always check the
brake pedal free play.


If proper adjustment cannot be
obtained as described, have a
Yamaha dealer make this ad-justment.
EAU44820
Checking the shift pedal The operation of the shift pedal should
be checked before each ride. If opera-
tion is not smooth, have a Yamaha
dealer check the vehicle.
1. Brake pedal free play
1
1. Brake pedal free play adjusting nut
(b) (a)
1
U1P683E0.book Page 16 Tuesday, April 29, 2008 2:05 PM

PERIODIC MAINTENANCE AND ADJUSTMENT
6-20
6
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]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.
Recommended lubricant:
Yamaha Chain and Cable Lube or
engine oil
Recommended lubricant:
Lithium-soap-based grease
U1P683E0.book Page 20 Tuesday, April 29, 2008 2:05 PM

PERIODIC MAINTENANCE AND ADJUSTMENT
6-21
6
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.
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.
Recommended lubricant:
Lithium-soap-based grease
Recommended lubricant:
Lithium-soap-based grease
Recommended lubricant:
Lithium-soap-based grease
U1P683E0.book Page 21 Tuesday, April 29, 2008 2:05 PM

PERIODIC MAINTENANCE AND ADJUSTMENT
6-22
6
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.
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 6-25 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.
U1P683E0.book Page 22 Tuesday, April 29, 2008 2:05 PM

PERIODIC MAINTENANCE AND ADJUSTMENT
6-23
6
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.
EAU40443
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 OFCHILDREN.
To remove the battery
1. Remove the seat. (See page 3-7.)
2. Remove the battery cover by re-
moving the bolts.
1. Bolt
2. Battery
3. Battery cover
U1P683E0.book Page 23 Tuesday, April 29, 2008 2:05 PM

PERIODIC MAINTENANCE AND ADJUSTMENT
6-25
6
EAU42022
Replacing the fuse The fuse is located inside the battery
coupler. (See page 6-23.)
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]
4. Connect the battery coupler.
5. Turn the key to “ON” and turn on
the electrical circuits to check if the
devices operate.
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 placing
1. Fuse
2. Spare fuse
Specified fuse:
10.0 A
U1P683E0.book Page 25 Tuesday, April 29, 2008 2:05 PM