engine YAMAHA YBR250 2007 User Guide

3-5
3
INSTRUMENT AND CONTROL FUNCTIONS
EAU12350
Pass switch “
”
Press this switch to flash the headlight.
EAU12400
Dimmer switch “
/
”
Set this switch to “
” for the high beam
and to “
” for the low beam.
EAU12460
Turn signal switch “
/
”
To signal a right-hand turn, push this
switch to “
”. To signal a left-hand turn,
push this switch to “
”. When released,
the switch returns to the center position.
To cancel the turn signal lights, push the
switch in after it has returned to the
center position.
EAU12500
Horn switch “
”
Press this switch to sound the horn.
EAU12660
Engine stop switch “
/
”
Set this switch to “
” before starting
the engine. Set this switch to “
” to stop
the engine in case of an emergency, such
as when the motorcycle overturns or
when the throttle cable is stuck.EAU12710
Start switch “
”
Push this switch to crank the engine with
the starter.
ECA10050
See page 5-1 for starting instructions
prior to starting the engine.
EAU12820
Clutch lever1. Clutch leverThe clutch lever is located at the left
handlebar grip. To disengage the clutch,
pull the lever toward the handlebar grip.
To engage the clutch, release the lever.
The lever should be pulled rapidly and
released slowly for smooth clutch
operation.
The clutch lever is equipped with a clutch
switch, which is part of the ignition circuit
cut-off system. (See page 3-12.)
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3-6
3
INSTRUMENT AND CONTROL FUNCTIONS
EAU12870
Shift pedal1. Shift pedalThe shift pedal is located on the left side
of the engine and is used in combination
with the clutch lever when shifting the
gears of the 5-speed constant-mesh
transmission equipped on this
motorcycle.
EAU12890
Brake lever
1
1. Front brake leverThe brake lever is located at the right
handlebar grip. To apply the front brake,
pull the lever toward the handlebar grip.
EAU12941
Brake pedal
1
1. Brake pedalThe brake pedal is on the right side of
the motorcycle. To apply the rear brake,
press down on the brake pedal.
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3-7
3
INSTRUMENT AND CONTROL FUNCTIONS
EAU13021
Fuel tank capTo remove the fuel tank cap
Insert the key into the lock and turn it
1/4 turn clockwise. The lock will be
released and the fuel tank cap can be
removed.
To install the fuel tank cap1. Insert the fuel tank cap into the tank opening with the key inserted
in the lock and with the “
” mark
facing forward.
2. Turn the key counterclockwise to the original position, and then
remove it.
The fuel tank cap cannot be installed
unless the key is in the lock. In addition, the key cannot be removed if the cap is
not properly installed and locked.
EWA10130
Make sure that the fuel tank cap is
properly installed before riding.
EAU13211
Fuel
1
2
1. Fuel tank filler tube
2. Fuel levelMake sure that there is sufficient fuel in
the tank. Fill the fuel tank to the bottom
of the filler tube as shown.
EWA10880
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Do not overfill the fuel tank,
otherwise it may overflow when
the fuel warms up and expands.
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Avoid spilling fuel on the hot
engine.
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3-8
3
INSTRUMENT AND CONTROL FUNCTIONS
ECA10070
Immediately wipe off spilled fuel with
a clean, dry, soft cloth, since fuel may
deteriorate painted surfaces or plastic
parts.
EAU33500
Recommended fuel:REGULAR UNLEADED GASOLINE ONLY
Fuel tank capacity: 19.2 L (5.07 US gal) (4.22 Imp. gal)
Fuel reserve amount (when the fuel level warning light comes on):
4.5 L (1.19 US gal) (1.00 Imp. gal)
ECA11400
Use only unleaded gasoline. The use
of leaded gasoline will cause severe
damage to internal engine parts, such
as the valves and piston rings, as well
as to the exhaust system.Your Yamaha engine has been designed
to use regular unleaded gasoline with a
research octane number of 91 or higher.
If knocking (or pinging) occurs, use a gasoline of a different brand. Use of
unleaded fuel will extend spark plug life
and reduce maintenance costs.
EAU13431
Catalytic converterThis model is equipped with a catalytic
converter in the exhaust system.
EWA10860
The exhaust system is hot after
operation. Make sure that the exhaust
system has cooled down before
doing any maintenance work.
ECA10700
The following precautions must be
observed to prevent a fire hazard or
other damages.l
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Use only unleaded gasoline. The
use of leaded gasoline will cause
unrepairable damage to the
catalytic converter.
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Never park the vehicle near
possible fire hazards such as
grass or other materials that
easily burn.
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Do not allow the engine to idle
too long.
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3-12
3
INSTRUMENT AND CONTROL FUNCTIONSbelow and have a Yamaha dealer
repair it if it does not function
properly.
EAU15311
Ignition circuit cut-off systemThe ignition circuit cut-off system
(comprising the sidestand switch, clutch
switch and neutral switch) has the
following functions. It prevents starting when the transmission is in gear and the
sidestand is up, but the clutch lever
is not pulled.
 It prevents starting when the transmission is in gear and the
clutch lever is pulled, but the
sidestand is still down.
 It cuts the running engine when the transmission is in gear and the
sidestand is moved down.
Periodically check the operation of the
ignition circuit cut-off system according
to the following procedure.
EWA10250
If a malfunction is noted, have a
Yamaha dealer check the system
before riding.
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3-13
3
INSTRUMENT AND CONTROL FUNCTIONS
With the engine turned off:
1. Move the sidestand down.
2. Make sure that the engine stop switch is turned on.
3. Turn the key on.
4. Shift the transmission into the neutral position.
5. Push the start switch.
Does the engine start?
With the engine still running:
6. Move the sidestand up.
7. Keep the clutch lever pulled.
8. Shift the transmission into gear.
9. Move the sidestand down.
Does the engine stall?
After the engine has stalled:
10. Move the sidestand up.
11. Keep the clutch lever pulled.
12. Push the start switch.
Does the engine start?
The system is OK. The motorcycle can be ridden.
This check is most reliable if performed with
a warmed-up engine.The neutral switch may be defective.
The motorcycle should not be ridden until
checked by a Yamaha dealer.
The sidestand switch may be defective.
The motorcycle should not be ridden until
checked by a Yamaha dealer.
The clutch switch may be defective.
The motorcycle should not be ridden until
checked by a Yamaha dealer.
YES NO YES NO YES NO NOTE:
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5-1
5
OPERATION AND IMPORTANT RIDING POINTS
EAU15950
EWA10270
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Become thoroughly familiar
with all operating controls and
their functions before riding.
Consult a Yamaha dealer
regarding any control or function
that you do not thoroughly
understand.
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Never start the engine or operate
it in a closed area for any length
of time. Exhaust fumes are
poisonous, and inhaling them
can cause loss of
consciousness and death within
a short time. Always make sure
that there is adequate
ventilation.
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Before starting out, make sure
that the sidestand is up. If the
sidestand is not raised
completely, it could contact the
ground and distract the operator,
resulting in a possible loss of
control.
EAUW0090
Starting the engineIn order for the ignition circuit cut-off
system to enable starting, one of the
following conditions must be met:l
The transmission is in the neutral
position.
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The transmission is in gear with the
clutch lever pulled and the
sidestand up.
EWA10290
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Before starting the engine, check
the function of the ignition
circuit cut-off system according
to the procedure described on
page 3-12.
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Never ride with the sidestand
down.
1. Turn the key to “ON” and make sure
that the engine stop switch is set
to “
”.
ECAW0041
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The engine trouble warning light
should come on for a few
seconds, then go off. If the warning light does not go off,
ask a Yamaha dealer to check the
motorcycle.
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The speedometer needle will
sweep across the speed range
and then return to zero. The
tachometer needle will sweep
across the r/min range and then
return to zero. If either needle
does not sweep across their
ranges, ask a Yamaha dealer to
check the motorcycle.
2. Shift the transmission into the
neutral position.When the transmission is in the neutral
position, the neutral indicator light should
be on, otherwise have a Yamaha dealer
check the electrical circuit.3. Start the engine by pushing thestart switch.If the engine fails to start, release the
start switch, wait a few seconds, and
then try again. Each starting attempt
should be as short as possible to
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5-2
5
OPERATION AND IMPORTANT RIDING POINTSpreserve the battery. Do not crank the
engine more than 10 seconds on any
one attempt.
ECA11040
For maximum engine life, never
accelerate hard when the engine is
cold!The engine is warm when it quickly
responds to the throttle.
EAU16671
ShiftingShifting gears lets you control the
amount of engine power available for
starting off, accelerating, climbing hills,
etc.
The gear positions are shown in the
illustration.
1 2 3 4 5
N
2
1
1. Shift pedal
2. Neutral positionTo shift the transmission into the neutral
position, press the shift pedal down
repeatedly until it reaches the end of its
travel, and then slightly raise it.
ECA10260
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Even with the transmission in
the neutral position, do not coast
for long periods of time with the engine off, and do not tow the
motorcycle for long distances.
The transmission is properly
lubricated only when the engine
is running. Inadequate
lubrication may damage the
transmission.
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Always use the clutch while
changing gears to avoid
damaging the engine,
transmission, and drive train,
which are not designed to
withstand the shock of forced
shifting.
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5-3
5
OPERATION AND IMPORTANT RIDING POINTS
EAU16810
Tips for reducing fuel
consumptionFuel consumption depends largely on
your riding style. Consider the following
tips to reduce fuel consumption:l
Shift up swiftly, and avoid high
engine speeds during acceleration.
l
Do not rev the engine while shifting
down, and avoid high engine
speeds with no load on the engine.
l
Turn the engine off instead of letting
it idle for an extended length of time
(e.g., in traffic jams, at traffic lights
or at railroad crossings).
EAU16841
Engine break-inThere is never a more important period
in the life of your engine than the period
between 0 and 1600 km (1000 mi). For
this reason, you should read the
following material carefully.
Since the engine is brand new, do not
put an excessive load on it for the first
1600 km (1000 mi). The various parts in
the engine wear and polish themselves
to the correct operating clearances.
During this period, prolonged full-throttle
operation or any condition that might
result in engine overheating must be
avoided.
EAU17100
0-1000 km (0-600 mi)
Avoid prolonged operation above 5000
r/min.
1000-1600 km (600-1000 mi)
Avoid prolonged operation above 6000
r/min.
ECA11150
After 1000 km (600 mi) of operation,
the engine oil must be changed, and
the oil filter element replaced.
1600 km (1000 mi) and beyond
The vehicle can now be operated
normally.
ECA10310
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Keep the engine speed out of the
tachometer red zone.
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If any engine trouble should
occur during the engine break-
in period, immediately have a
Yamaha dealer check the vehicle.
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5-4
5
OPERATION AND IMPORTANT RIDING POINTS
EAU17212
ParkingWhen parking, stop the engine, and then
remove the key from the main switch.
EWA10310
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Since the engine and exhaust
system can become very hot,
park in a place where
pedestrians or children are not
likely to touch them.
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Do not park on a slope or on soft
ground, otherwise the vehicle
may overturn.
ECA10380
Never park in an area where there are
fire hazards such as grass or other
flammable materials.
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