YAMAHA TTR50 2015 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
ECA11621
In or der to prevent clutch slip-
pa ge (since the en gine oil also
lu bricates the clutch), do not
mix any chemical add itives. Do
not use oils with a diesel speci-
fication of “CD” or oils of a hi gh-
er quality than specified . In
a dd ition, do not use oils lab eled
“ENERGY CONSERVING II” or
hi gher.
 Make sure that no forei gn mate-
rial enters the crankcase.6. Start the engine, and then let it idle for several minutes while checking
it for oil leakage. If oil is leaking,
immediately 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.
EAU39835
Cleanin g the air filter elementThe 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 element
1. 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. GasketTightenin g torque:
Engine oil drain bolt: 20 Nm (2.0 m·kgf, 14 ft·lbf)1
2
Recommen ded en gine oil:
See page 9-1.
Oil chan ge 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 d ed icated parts
cleanin g solvent. To avoi d the risk of fire or explosion,
do not
use gasoline or solvents with a
low flash point.
[EWA10432]
NOTICE:
To avoi d damag ing the foam
material, han dle it g ently an d
carefully, an d d o not twist or
wrin g it.
[ECA10512]
5. Apply oil of the recommended
type to the entire surface of the
sponge material, and then
squeeze the excess 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 an d the spon ge material
are properly seate d in the air fil-
ter case. The en gine shoul d
never be operated without the
mesh an d the spon ge material
installe d, otherwise the pis-
ton(s) an d/or cylin der(s) may
b ecome excessively worn.
[ECA15573]
7. Install the air filter case cover by
installing 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
Recommen ded 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.
EAU40422
Cleanin g the spark arresterThe spark arrester should be cleaned
at the intervals specified in the periodic
maintenance and lubrication chart.
WARNING
EWA10981
 Always let the exhaust system
cool prior to touching exhaust
components.
 Do not start the en gine when
cleanin g 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 removing
the 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
arrester portion of the tailpipe and
inside 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.
EAU39931
Adjustin g the car buretorThe carburetor is an important part of
the engine and requires very sophisti-
cated adjustment. Therefore, most
carburetor adjustments should be left
to a Yamaha dealer, who has the nec-
essary professional knowledge and ex-
perience. The adjustment described in
the following section, however, may be
serviced by the owner as part of rou-
tine maintenance.NOTICE
ECA10551
The car buretor has b een set and ex-
tensively teste d at the Yamaha fac-
tory. Chang ing these settin gs
without sufficient technical knowl-
e dge may result in poor perfor-
mance of or damag e to the en gine.
EAU21363
A djustin g the en gine i dlin g
spee dThe 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
specification by turning the throt-
tle stop screw. To increase the en-
gine idling speed, turn the screw in
Tightenin g 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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direction (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.
EAU21385
Checkin g the throttle grip free
playThe 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.
EAU21402
Valve clearanceThe 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 screwEn gine i dlin g spee d:
1600–1800 r/min
(a)
(b)
1
1. Throttle grip free play
1
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PERIODIC MAINTENANCE AND ADJUSTMENT
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7
EAU39827
TiresTires 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
EWA15371
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 a djuste d on col d tires
(i.e., when the temperature of the
tires equals the am bient 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 side-
wall is cracked, have a Yamaha dealer
replace the tire immediately. Tire information
This model is equipped with 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
EWA10462
The front an
d rear tires shoul d b e of
the same make an d d esi gn, other-
wise the han dlin g characteristics of
the vehicle may b e different, which
coul d lea d to an acci dent.After extensive tests, only the tires list-
ed below have been approved for this
model by Yamaha.
Stan dar d tire air pressure:
Front:
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 trea d d epth (front an d
rear): 4.0 mm (0.16 in)
12
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PERIODIC MAINTENANCE AND ADJUSTMENT
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WARNING
EWA15542
Have a Yamaha d ealer replace
excessively worn tires. Operat-
in g the motorcycle with exces-
sively worn tires decreases
ri din g sta bility an d can lead to
loss of control.
 The replacement of all wheel-
and b rake-relate d parts, inclu d-
in g the tires, shoul d b e left to a
Yamaha dealer, who has the
necessary professional knowl-
e dge an d experience.
 It is not recommen ded to patch
a puncture d tu be. If unavoid -
a b le, however, patch the tu be very carefully an
d replace it as
soon as possi ble with a hi gh-
quality pro duct.
 Ride conservatively after
chan gin g a tire since the tire
must seat itself on the rim prop-
erly. Failure to allow proper
seatin g may cause tire failure,
which may result in damag e to
the motorcycle an d injury to the
ri der.
EAU21944
Spoke wheels
WARNING
EWA10611
The wheels on this mod el are not
d esi gne d for use with tu beless tires.
Do not attempt to use tu beless tires
on this mo del.To maximize the performance, durabil-
ity, and safe operation of your motor-
cycle, note the following points
regarding the specified wheels.
 The wheel rims should be
checked for cracks, bends, warp-
age or other damage, and the
spokes for looseness or damage
before each ride. If any damage is
found, have a Yamaha dealer re-
place the wheel. Do not attempt
even the smallest repair to the
wheel. A deformed 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
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7
EAU46252
Adjustin g the clutch free playThe 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 speci-
fied torque.
TIPWhen tightening the locknut, hold the
clutch adjusting screw with a screw-
driver so that it does not turn together
with the locknut.5. Install the clutch adjusting screwcover by installing the screws.
EAU22132
Adjustin g the brake lever free
playThe 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 screwTi ghtenin g 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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WARNING
EWA10651
If proper adjustment cannot b e ob-
taine d as d escri bed , have a Yamaha
d ealer make this ad justment.
EAU44672
Adjustin g the brake pe dal free
playThe 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
EWA14821
 After a djustin g the drive chain
slack or removin g an d installin g
the rear wheel, always check
the brake ped al free play.
 If proper a djustment cannot be
o btaine d as descri bed , 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
EAU44821
Checking the shift pe dalThe operation of the shift pedal should
be checked before each ride. If opera-
tion is not smooth, have a Yamaha
dealer check the vehicle.
EAU22363
Checkin g the front an d rear
b rake shoesFront
Rear The 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 indica-
tor 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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