2014 YAMAHA TTR50 engine

INSTRUMENT AND CONTROL FUNCTIONS
4-2
4
EAU12661
Engine stop switch “ / ”
Set this switch to “ ” before starting
the engine. Set this switch to “ ” to
stop the engine in case of an emergen-
cy, such as when the vehicle overturns
or when the throttle cable is stuck.
EAU12713
Start switch “ ”
Push this switch to crank the engine
with the starter. See page 6-1 for start-
ing instructions prior to starting the en-
gine.
EAU39865
Spee d limiterYour motorcycle is equipped with an
adjustable speed limiter. The speed
limiter keeps the throttle from fully
opening, even when the throttle grip is
turned to the maximum.
1. Loosen the locknut.
2. To increase the maximum engine power available and the maximum
speed of the motorcycle, turn the
adjusting screw in direction (a). To
decrease the maximum engine
power available and the maximum
speed of the motorcycle, turn the
adjusting screw in direction (b).
3. Tighten the locknut.
WARNING
EWA14404
Improper a djustment of the spee d
limiter coul d cause improper throttle
operation. You coul d lose control,
have an acci dent or b e injured. Do
not turn the a djustin g screw out
more than 28 mm (1.1 in). Always
make sure the throttle g rip free play
is a djuste d to 3.0–5.0 mm (0.12–0.20
in). (See pa ge 7-12.)
1. Locknut
2. Adjusting screw
1 2
(b)
(a)
1. No more than 28 mm (1.1 in)
1
U2CJ81E0.book Page 2 Wednesday, July 10, 2013 3:54 PM

INSTRUMENT AND CONTROL FUNCTIONS
4-4
4
EAU13183
Fuel tank capTo remove the fuel tank cap, turn it
counterclockwise, and then pull it off.
To install the fuel tank cap, insert it into
the tank opening, and then turn it
clockwise.
WARNING
EWA11092
Make sure that the fuel tank cap is
properly closed after filling fuel.
Leakin g fuel is a fire hazar d.
EAU13213
FuelMake sure there is sufficient gasoline in
the tank.
WARNING
EWA10882
Gasoline an d gasoline vapors are
extremely flammab le. To avoid fires
an d explosions an d to re duce the
risk of injury when refueling , follow
these instructions.1. Before refueling, turn off the en- gine and be sure that no one is sit-
ting on the vehicle. Never refuel
while smoking, or while in the vi-
cinity of sparks, open flames, or
other sources of ignition such as
the pilot lights of water heaters
and clothes dryers.
2. Do not overfill the fuel tank. Stop filling when the fuel reaches the
bottom of the filler tube. Because
fuel expands when it heats up,
heat from the engine or the sun
can cause fuel to spill out of the
fuel tank. 3. Wipe up any spilled fuel immedi-
ately. NOTICE: Immediately
wipe off spille d fuel with a clean,
d ry, soft cloth, since fuel may
d eteriorate painte d surfaces or
plastic parts.
[ECA10072]
4. Be sure to securely close the fuel tank cap.
WARNING
EWA15152
Gasoline is poisonous an d can
cause injury or death. Han dle gaso-
line with care. Never siphon gasoline
b y mouth. If you shoul d swallow
some gasoline or inhale a lot of g as-
oline vapor, or get some gasoline in
your eyes, see your doctor imme di-
1. Fuel tank cap
1
1. Fuel tank filler tube
2. Maximum fuel level
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INSTRUMENT AND CONTROL FUNCTIONS
4-5
4ately. If
gasoline spills on your skin,
wash with soap an d water. If gaso-
line spills on your clothin g, chan ge
your clothes.
EAU50253
For Cana daNOTICE
ECA11401
Use only unlea ded g asoline. The use
of lead ed g asoline will cause severe
d amag e to internal en gine parts,
such as the valves an d piston rin gs,
as well as to the exhaust system.Your Yamaha engine has been de-
signed to use regular unleaded gaso-
line with a pump octane number
[(R+M)/2] of 86 or higher, or a research
octane number of 91 or higher. If knocking (or pinging) occurs, use a
gasoline of a different brand or premi-
um unleaded fuel. Use of unleaded fuel
will extend spark plug life and reduce
maintenance costs.
Gasohol
There are two types of gasohol: gaso-
hol containing ethanol and that con-
taining methanol. Gasohol containing
ethanol can be used if the ethanol con-
tent does not exceed 10% (E10). Gas-
ohol containing methanol is not
recommended by Yamaha because it
can cause damage to the fuel system
or vehicle performance problems.
For Europe
NOTICE
ECA11401
Use only unlea
ded g asoline. The use
of lea ded g asoline will cause severe
d amag e to internal en gine parts,
such as the valves an d piston rin gs,
as well as to the exhaust system.Your Yamaha engine has been de-
signed to use regular unleaded gaso-
line with a research octane number of
95 or higher. If knocking (or pinging)
occurs, use a gasoline of a different
brand or premium unleaded fuel. Use
of unleaded fuel will extend spark plug
life and reduce maintenance costs.
Gasohol
There are two types of gasohol: gaso-
hol containing ethanol and that con-
taining methanol. Gasohol containing
ethanol can be used if the ethanol con-
tent does not exceed 10% (E10). Gas-
ohol containing methanol is not
recommended by Yamaha because it
can cause damage to the fuel system
or vehicle performance problems.
Recommen ded fuel:
Regular unleaded gasoline (Gasohol
(E10) acceptable)
Fuel tank capacity:
3.1 L (0.82 US gal, 0.68 Imp.gal)
Fuel reserve amount: 0.4 L (0.11 US gal, 0.09 Imp.gal)
Recommen ded fuel:
Regular unleaded gasoline (Gasohol
(E10) acceptable)
Fuel tank capacity:
3.1 L (0.82 US gal, 0.68 Imp.gal)
Fuel reserve amount: 0.4 L (0.11 US gal, 0.09 Imp.gal)
U2CJ81E0.book Page 5 Wednesday, July 10, 2013 3:54 PM

INSTRUMENT AND CONTROL FUNCTIONS
4-6
4
For Oceania an
d South Africa
NOTICE
ECA11401
Use only unlea ded g asoline. The use
of lead ed g asoline will cause severe
d amag e to internal en gine parts,
such as the valves an d piston rin gs,
as well as to the exhaust system.Your Yamaha engine has been de-
signed to use regular unleaded gaso-
line with a research octane number of
91 or higher. If knocking (or pinging)
occurs, use a gasoline of a different
brand or premium unleaded fuel. Use
of unleaded fuel will extend spark plug
life and reduce maintenance costs.
Gasohol
There are two types of gasohol: gaso-
hol containing ethanol and that con-
taining methanol. Gasohol containing
ethanol can be used if the ethanol con- tent does not exceed 10% (E10). Gas-
ohol containing methanol is not
recommended by Yamaha because it
can cause damage to the fuel system
or vehicle performance problems.
EAU13414
Fuel tank
breather hoseBefore operating the motorcycle:
 Check the fuel tank breather hose
connection.
 Check the fuel tank breather hose
for cracks or damage, and replace
it if necessary.
 Make sure that the fuel tank
breather hose is not blocked, and
clean it if necessary.
Recommen ded fuel:
Regular unleaded gasoline (Gasohol
(E10) acceptable)
Fuel tank capacity:
3.1 L (0.82 US gal, 0.68 Imp.gal)
Fuel reserve amount: 0.4 L (0.11 US gal, 0.09 Imp.gal)
1. Fuel tank breather hose
U2CJ81E0.book Page 6 Wednesday, July 10, 2013 3:54 PM

INSTRUMENT AND CONTROL FUNCTIONS
4-7
4
EAU13562
Fuel cockThe fuel cock supplies fuel from the
tank to the carburetor while filtering it
also.
The fuel cock has three positions:
OFF
With the lever in this position, fuel will
not flow. Always return the lever to this
position when the engine is not run-
ning.ON
With the lever in this position, fuel flows
to the carburetor. Normal riding is done
with the lever in this position.
RES
This indicates reserve. If you run out of
fuel while riding, move the lever to this
position. Fill the tank at the first oppor-
tunity. Be sure to set the lever back to
“ON” after refueling!1. Arrow mark positioned over “OFF”
1. Arrow mark positioned over “ON”
1. Arrow mark positioned over “RES”
U2CJ81E0.book Page 7 Wednesday, July 10, 2013 3:54 PM

INSTRUMENT AND CONTROL FUNCTIONS
4-8
4
EAU13591
Starter (choke) lever “ ”Starting a cold engine requires a richer
air-fuel mixture, which is supplied by
the starter (choke).
Move the lever in direction (a) to turn on
the starter (choke).
Move the lever in direction (b) to turn
off the starter (choke).
EAU13961
SeatTo remove the seat
Remove the bolts, and then pull the
seat off.
To install the seat1. Insert the projections on the front of the seat into the seat holders as
shown. 2. Place the seat in the original posi-
tion, and then tighten the bolts.
TIPMake sure that the seat is properly se-
cured before riding.
1. Starter (choke) lever “ ”
1
(a)
(b)
1. Bolt
1. Projection
2. Seat holder
U2CJ81E0.book Page 8 Wednesday, July 10, 2013 3:54 PM

INSTRUMENT AND CONTROL FUNCTIONS
4-9
4
EAU37491
Sidestan dThe sidestand is located on the left
side of the frame. Raise the sidestand
or lower it with your foot while holding
the vehicle upright.
WARNING
EWA14191
The vehicle must not be ri dden with
the si destan d d own, or if the si de-
stan d cannot b e properly move d up
(or does not stay up), otherwise the
si destan d coul d contact the groun d
an d d istract the operator, resultin g
in a possi ble loss of control.
EAU41612
Startin g circuit cut-off systemThe starting circuit cut-off system pre-
vents starting when the transmission is
in gear.
Periodically check the operation of the
starting circuit cut-off system accord-
ing to the following procedure.TIPThis check is most reliable if performed
with a warmed-up engine.
U2CJ81E0.book Page 9 Wednesday, July 10, 2013 3:54 PM

INSTRUMENT AND CONTROL FUNCTIONS
4-10
4
With the engine turned off:
1. Make sure that the engine stop switch is set to “”.
2. Turn the key to “ON”.
3. Shift the transmission into gear.
4. Keep the front or rear brake applied.
5. Push the start switch.
Does the engine start?
The neutral switch may not be working correctly.
The motorcycle should not be ridden until
checked by a Yamaha dealer.
6. Shift the transmission into the neutral position.
7. Push the start switch.
Does the engine start?
The neutral switch may not be working correctly.
The motorcycle should not be ridden
until
checked by a Yamaha dealer.
YES
NO
The system is OK. The motorcycle can be ridden.
YES
NO
If a malfunction is noted, have a Yamaha
dealer check the system before riding.
WARNING
U2CJ81E0.book Page 10 Wednesday, July 10, 2013 3:54 PM