length YAMAHA YBR250 2007 Owners Manual

1-4
1
SAFETY INFORMATION
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Never start the engine or let it run
for any length of time in a closed
area. The exhaust fumes are
poisonous and may cause loss of
consciousness and death within a
short time. Always operate your
motorcycle in an area that has
adequate ventilation.
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Always turn the engine off before
leaving the motorcycle unattended
and remove the key from the main
switch. When parking the
motorcycle, note the following:lThe engine and exhaust system
may be hot, therefore, park the
motorcycle in a place where
pedestrians or children are not
likely to touch these hot areas.lDo not park the motorcycle on a
slope or soft ground, otherwise it
may fall over.lDo not park the motorcycle near
a flammable source, (e.g., a
kerosene heater, or near an open
flame), otherwise it could catch
fire.
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When transporting the motorcycle
in another vehicle, make sure that
it is kept upright. If the motorcycleshould lean over, gasoline may leak
out of the fuel tank.
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If you should swallow any gasoline,
inhale a lot of gasoline vapor, or
allow gasoline to get into your eyes,
see your doctor immediately. If any
gasoline spills on your skin or
clothing, immediately wash the
affected area with soap and water
and change your clothes.
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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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5-3
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.
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Do not rev the engine while shifting
down, and avoid high engine
speeds with no load on the engine.
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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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8-1
SPECIFICATIONS
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Dimensions:Overall length:2025 mm (79.7 in)
Overall width: 745 mm (29.3 in)
Overall height:
1065 mm (41.9 in)
Seat height:
805 mm (31.7 in)
Wheelbase: 1360 mm (53.5 in)
Ground clearance:
190 mm (7.5 in)
Minimum turning radius:
2395 mm (94.3 in)Weight:With oil and fuel:154.0 kg (339 lb)Engine:Engine type:Air cooled 4-stroke, SOHC
Cylinder arrangement: Forward-inclined single cylinder
Displacement:
249.0 cm
3 (15.2 cu.in)
Bore x stroke:
74.0 x 58.0 mm (2.91 x 2.28 in)
Compression ratio: 9.80:1
Starting system:
Electric starter
Lubrication system:
Wet sump
Engine oil:Type:SAE20W40 or SAE20W50Recommended engine oil grade: API service SF, SG type or higher
Engine oil quantity:
Without oil filter element replacement 1.35 L (1.43 US qt) (1.19 imp. qt)
With oil filter element replacement
1.45 L (1.53 US qt) (1.28 imp. qt)Air filter:Air filter element:Wet elementFuel:Recommended fuel:Regular unleaded gasoline only
Fuel tank capacity:
19.2 L (5.07 US gal) (4.22 imp. gal)
Fuel reserve amount:
4.5 L (1.19 US gal) (1.00 imp. gal)
Fuel injection:Manufacturer:AISAN
Model/quantity: 1100-87F70/1Spark plug:Manufacturer/model:NGK/DR8EA
Spark plug gap:
0.6-0.7 mm (0.024 - 0.028 in)Clutch:Clutch type:Wet, multiple-discTransmission:Primary reduction system:Spur gear
Primary reduction ratio:
74/24 (3.083)
Secondary reduction system: Chain drive
Secondary reduction ratio:
44/15 (2.933)
Transmission type:
Constant mesh 5-speed
Operation: Left foot operation
Gear ratio:
1st:
36/14 (2.571)
2nd:
32/19 (1.684)
3rd:
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