YAMAHA TT-R50E 2020 Workshop Manual

Periodic maintenance an d a djustment
7-9
7
EAU39835
Cleanin g 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 element
1. Remove the air filter case cover by removing the screws.
2. Pull the sponge material and the air filter mesh out. 3. Clean the mesh with solvent, and
then wipe the solvent off.
4. Clean the sponge material with solvent, and then squeeze the re-
maining solvent out. WARNING!
Use only a ded 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.
TIP
The sponge material should be wet but
not dripping.
1. Screw
2. Air filter case cover
1. Sponge material
1. Air filter mesh
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Periodic maintenance an d a djustment
7-10
7 6. Insert the mesh and the sponge
material 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 e-
come 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.
2. If dirt or water is visible, remove the hose, clean it, and then install
it.
EAU40422
Cleanin g the spark arrester
The 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 touchin g exhaust
components.
 Do not start the en gine when
cleanin g the exhaust system.
TIP
Make 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.
Recommen ded oil:
Yamaha foam air filter oil or other
quality foam air filter oil
1. Air filter check hose
1. Tailpipe bolt
2. Tailpipe
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Periodic maintenance an d a djustment
7-11
7
3. Insert the tailpipe into the muffler,
and then install and tighten the
bolts to the specified torque.
TIP
Make sure to align the bolt holes when
inserting the tailpipe.
EAU39931
Adjustin g the car buretor
The 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. Chan gin g these settin gs
without sufficient technical knowl-
e dge may result in poor perfor-
mance of or d amage to the en gine.
1. Spark arrester
Ti ghtening torque:
Tailpipe bolt: 10 N·m (1.0 kgf·m, 7.4 lb·ft)
1
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Periodic maintenance an d a djustment
7-12
7
EAU21363
A djustin g the en gine i dlin g
spee d
The engine idling speed must be
checked and, if necessary, adjusted as
follows at the intervals specified in the
periodic maintenance and lubrication
chart.
TIP
A 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.
TIP
The 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
direction (a). To decrease the en-
gine idling speed, turn the screw in
direction (b).
TIP
If the specified idling speed cannot be
obtained as described above, have a
Yamaha dealer make the adjustment.
1. Throttle stop screw
(a)(b)
1
En gine i dlin g spee d:
1600–1800 r/min
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Periodic maintenance an d a djustment
7-13
7
EAU21386
Checkin g the throttle grip free
play
Measure the throttle grip free play as
shown.
Periodically check the throttle grip free
play and, if necessary, have a Yamaha
dealer adjust it.
EAU21403
Valve clearance
The valves are an important engine
component, and since valve clearance
changes with use, they must be
checked and adjusted at the intervals
specified in the periodic maintenance
chart. Unadjusted valves can result in
improper air-fuel mixture, engine
noise, and eventually engine damage.
To prevent this from occurring, have
your Yamaha dealer check and adjust
the valve clearance at regular intervals.
TIP
This service must be performed when
the engine is cold.1. Throttle grip free play
Throttle g rip free play:
3.0–5.0 mm (0.12–0.20 in)
1
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Periodic maintenance an d a djustment
7-14
7
EAU64472
Tires
Tires are the only contact between the
vehicle and the ground. Safety in all
conditions of riding depends on a rela-
tively small area of contact. Therefore,
it is essential to maintain the tires in
good condition at all times and replace
them at the appropriate time with the
specified 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 be different, which
coul d lea d to an acci dent.
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 depth
Minimum tire trea d d epth (front an d
rear): 4.0 mm (0.16 in)
1
2
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Periodic maintenance an d a djustment
7-15
7
After extensive tests, only the tires list-
ed below have been approved for this
model by Yamaha.
WARNING
EWA15542

Have a Yamaha dealer 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-related parts, includ-
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 prod uct.
 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.
EAU21945
Spoke wheels
To maximize the performance, durabil-
ity, and safe operation of the vehicle,
note the following points.
 Check each wheel for cracks, de-
formation and other damage. If
any damage is found, have the
wheel inspected by your Yamaha
dealer. Do not attempt to repair or
straighten a bent or damaged
wheel.
 Check the spokes for looseness. If
any loose spokes are found, have
the wheel adjusted by your
Yamaha dealer. Improperly tight- ened spokes can cause wheel
misalignment.
 Have the wheel balanced whenev-
er the tire or tube has been re-
placed. An unbalanced wheel can
result in adverse handling charac-
teristics and shortened tire life.
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.
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 an d a djustment
7-16
7
EAU46252
A djustin g 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 speci- fied torque.
TIP
When 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.
1. Screw
2. Clutch adjusting screw cover
1. Locknut
2. Clutch adjusting screw
Tightening torque:
Locknut: 6 N·m (0.6 kgf·m, 4.4 lb·ft)
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Periodic maintenance an d a djustment
7-17
7
EAU22133
A djustin g the brake lever free
play
Measure the brake lever free play as
shown.
Periodically check the brake lever free
play and, if necessary, adjust it as fol-
lows.
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).
WARNING
EWA10651
If proper a djustment cannot b e ob-
taine d as d escri bed , have a Yamaha
d ealer make this a djustment.
1. Brake lever free play
Brake lever free play:
10.0–20.0 mm (0.39–0.79 in)
1. Brake lever free play adjusting nut
1
1
(a) (b)
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Periodic maintenance an d a djustment
7-18
7
EAU44673
A djustin g the brake pe dal free
play
Measure the brake pedal free play at
the brake pedal end as shown.
Periodically check the brake pedal free
play and, if necessary, adjust it as fol-
lows.
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 d rive 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 b e
o btaine d as d escribed , have a
Yamaha dealer make this ad -
justment.
1. Brake pedal free play
Brake ped al free play:
10.0–20.0 mm (0.39–0.79 in)
1. Brake pedal free play adjusting nut
1
(b)
(a)
1
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