YAMAHA TTR50 2013 Workshop Manual

PERIODIC MAINTENANCE AND ADJUSTMENT
7-8
7
3. Remove the engine oil filler cap,
the engine oil drain bolt and its
gasket to drain the oil from the
crankcase.
4. Install a new gasket and the drain bolt, and then tighten the drain bolt
to the specified torque.
5. Refill with the specified amount of the recommended engine oil, and
then install and tighten the oil filler
cap.
NOTICE
ECA11620
●
In order to prevent clutch slip-
page (since the engine oil also
lubricates the clutch), do not
mix any chemical additives. Do
not use oils with a diesel speci-
fication of “CD” or oils of a high-
er quality than specified. In
addition, do not use oils labeled
“ENERGY CONSERVING II” or
higher.
●
Make sure that no foreign mate-
rial enters the crankcase.
6. Start the engine, and then let it idlefor several minutes while checking
it for oil leakage. If oil is leaking, im-
mediately turn the engine off and
check for the cause.
7. Turn the engine off, and then check the oil level and correct it if
necessary.
EAU39834
Cleaning the air filter element The air filter element should be cleaned
as follows at the intervals specified in
the periodic maintenance and lubrica-
tion chart. Clean or, if necessary, re-
place the air filter element more
frequently if you are riding in unusually
wet or dusty areas.
To clean the air filter element1. Remove the air filter case cover by removing the screws.
2. Pull the sponge material and the air filter mesh out.
1. Engine oil drain bolt
2. GasketTightening torque:Engine oil drain bolt:20 Nm (2.0 m·kgf, 14 ft·lbf)1
2
Recommended engine oil: See page 9-1.
Oil change quantity: 0.80 L (0.85 US qt, 0.70 Imp.qt)
1. Screw
2. Air filter case cover
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PERIODIC MAINTENANCE AND ADJUSTMENT
7-9
73. Clean the mesh with solvent, andthen wipe the solvent off.
4. Clean the sponge material with solvent, and then squeeze the re-
maining solvent out. WARNING!
Use only a dedicated parts
cleaning solvent. To avoid the risk of fire or explosion, do not
use gasoline or solvents with a
low flash point.
[EWA10431]

NOTICE:
To avoid damaging the foam
material, handle it gently and
carefully, and do not twist or
wring it.
[ECA10511]
5. Apply oil of the recommended type to the entire surface of the sponge
material, and then squeeze the ex-
cess oil out.TIPThe sponge material should be wet but
not dripping.
6. Insert the mesh and the spongematerial into the air filter case.
NOTICE: Make sure that the
mesh and the sponge material
are properly seated in the air fil-
ter case. The engine should
never be operated without the
mesh and the sponge material
installed, otherwise the pis-
ton(s) and/or cylinder(s) may
become excessively worn.
[ECA15572]
7. Install the air filter case cover by in- stalling the screws.
To clean the air filter check hose 1. Check the hose at the bottom of the air filter case for accumulated
dirt or water.
1. Sponge material
1. Air filter mesh
Recommended oil:Yamaha foam air filter oil or other
quality foam air filter oil
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PERIODIC MAINTENANCE AND ADJUSTMENT
7-10
7
2. If dirt or water is visible, remove
the hose, clean it, and then install
it.
EAU40421
Cleaning the spark arrester The spark arrester should be cleaned
at the intervals specified in the periodic
maintenance and lubrication chart.
WARNING
EWA10980
●
Always let the exhaust system
cool prior to touching exhaust
components.
●
Do not start the engine when
cleaning the exhaust system.
TIPMake sure to select a well-ventilated
area free of combustible materials to
clean the spark arrester.1. Remove the tailpipe by removingthe bolts, and then pulling it out of
the muffler. 2. Tap the tailpipe lightly, and then
use a wire brush to remove any
carbon deposits from the spark ar-
rester portion of the tailpipe and in-
side of the tailpipe housing.
1. Air filter check hose
1. Tailpipe bolt
2. Tailpipe
1. Spark arrester
1
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PERIODIC MAINTENANCE AND ADJUSTMENT
7-11
73. Insert the tailpipe into the muffler,
and then install and tighten the
bolts to the specified torque.
TIPMake sure to align the bolt holes when
inserting the tailpipe.
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.NOTICE
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.
EAU21362
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.TIPA diagnostic tachometer is needed to
make 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.TIPThe engine is warm when it quickly re-
sponds to the throttle.3. Check the engine idling speedand, if necessary, adjust it to spec-
ification by turning the throttle stop
screw. To increase the engine
idling speed, turn the screw in di-
Tightening torque:Tailpipe bolt:10 Nm (1.0 m·kgf, 7.2 ft·lbf)
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PERIODIC MAINTENANCE AND ADJUSTMENT
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7
rection (a). To decrease the en-
gine idling speed, turn the screw in
direction (b).
TIPIf the specified idling speed cannot be
obtained as described above, have a
Yamaha dealer make the adjustment.
EAU21384
Checking the throttle grip free
play The throttle grip free play should mea-
sure 3.0–5.0 mm (0.12–0.20 in) at the
inner edge of the throttle grip. Periodi-
cally check the throttle grip free play
and, if necessary, have a Yamaha deal-
er adjust it.
EAU21401
Valve clearance The valve clearance changes with use,
resulting in improper air-fuel mixture
and/or engine noise. To prevent this
from occurring, the valve clearance
must be adjusted by a Yamaha dealer
at the intervals specified in the periodic
maintenance and lubrication chart.
1. Throttle stop screwEngine idling speed: 1600–1800 r/min
(a)
(b)
1
1. Throttle grip free play
1
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PERIODIC MAINTENANCE AND ADJUSTMENT
7-13
7
EAU39825
Tires Tires are the only contact between the
vehicle and the road. Safety in all con-
ditions of riding depends on a relatively
small area of road contact. Therefore, it
is essential to maintain the tires in good
condition at all times and replace them
at the appropriate time with the speci-
fied tires.
Tire air pressure
The tire air pressure should be checked
and, if necessary, adjusted before each
ride.
WARNING
EWA15370
Operation of this vehicle with im-
proper tire pressure may cause se-
vere injury or death from loss of
control.
The tire air pressure must be
checked and adjusted on cold tires
(i.e., when the temperature of the
tires equals the ambient tempera-
ture).
Tire 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.
Tires age, even if they have not been
used or have only been used occasion-
ally. Cracking of the tread and sidewall
rubber, sometimes accompanied by
carcass deformation, is an evidence of
ageing. Old and aged tires shall be
checked by tire specialists to ascertain
their suitability for further use.
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, which
could lead to an accident.After extensive tests, only the tires list-
ed below have been approved for this
model by Yamaha Motor Co., Ltd.
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
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PERIODIC MAINTENANCE AND ADJUSTMENT
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7
WARNING
EWA15541
●
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.
●
Ride conservatively after
changing a tire since the tire
must seat itself on the rim prop-
erly. Failure to allow proper
seating may cause tire failure,
which may result in damage to
the motorcycle and injury to the
rider.
EAU21943
Spoke wheels
WARNING
EWA10610
The wheels on this model are not de-
signed for use with tubeless tires.
Do not attempt to use tubeless tires
on this model.To maximize the performance, durabil-
ity, and safe operation of your motorcy-
cle, note the following points regarding
the specified wheels.●
The wheel rims should be checked
for cracks, bends, warpage or oth-
er damage, and the spokes for
looseness or damage before each
ride. If any damage is found, have
a Yamaha dealer replace the
wheel. Do not attempt even the
smallest repair to the wheel. A de-
formed or cracked wheel must be
replaced.
●
The wheel should be balanced
whenever either the tire or wheel
has been changed or replaced. An
unbalanced wheel can result in
poor performance, adverse han-
dling characteristics, and a short-
ened tire life.
Front tire:
Size:
2.50-10 4PR
Manufacturer/model:
CHENG SHIN/C183A
Rear tire: Size:
2.50-10 4PR
Manufacturer/model: CHENG SHIN/C183A
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PERIODIC MAINTENANCE AND ADJUSTMENT
7-15
7
EAU46251
Adjusting the clutch free play The clutch free play must be checked
and, if necessary, adjusted as follows
at the intervals specified in the periodic
maintenance and lubrication chart.1. Remove the clutch adjusting screw cover by removing the
screws.
2. Loosen the locknut.
3. Slowly turn the clutch adjusting screw in direction (a) until resis-
tance is felt, and then turn it 1/8
turn in direction (b). 4. Tighten the locknut to the specified
torque.
TIPWhen tightening the locknut, hold the
clutch adjusting screw with a screwdriv-
er so that it does not turn together with
the locknut.5. Install the clutch adjusting screwcover by installing the screws.
EAU22131
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 brake lever free play adjusting
nut at the brake shoe plate in direction
(a). To decrease the brake lever free
play, turn the adjusting nut in direction
(b).
1. Screw
2. Clutch adjusting screw cover
1. Locknut
2. Clutch adjusting screwTightening torque:Locknut:6 Nm (0.6 m·kgf, 4.3 ft·lbf)
1. Brake lever free play
1
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PERIODIC MAINTENANCE AND ADJUSTMENT
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7
WARNING
EWA10650
If proper adjustment cannot be ob-
tained as described, have a Yamaha
dealer make this adjustment.
EAU44671
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 brake pedal free play 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.
1. Brake lever free play adjusting nut
1
(a) (b)
1. Brake pedal free play
1
1. Brake pedal free play adjusting nut
(b)
(a)
1
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PERIODIC MAINTENANCE AND ADJUSTMENT
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7
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.
EAU22361
Checking the front and rear
brake shoes Front
RearThe front and rear brake shoes must be
checked for wear at the intervals spec-
ified in the periodic maintenance and
lubrication chart. Each brake is provid-
ed with a wear indicator, which allows
you to check the brake shoe wear with-
out having to disassemble the brake.
To check the brake shoe wear, check
the position of the wear indicator while
applying the brake. If a brake shoe has
worn to the point that the wear indicator
reaches the wear limit line, have a
Yamaha dealer replace the brake shoes as a set.1. Brake shoe wear indicator
2. Brake shoe wear limit line
1. Brake shoe wear indicator
2. Brake shoe wear limit line
2
1
2 1
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