2007 YAMAHA YBR250 Owners Manual

6-24
6
PERIODIC MAINTENANCE AND MINOR REPAIR
EAU23280
Checking the steeringWorn or loose steering bearings may
cause danger. Therefore, the operation
of the steering must be checked as
follows at the intervals specified in the
periodic maintenance and lubrication
chart.1. Place a stand under the engine to raise the front wheel off the ground.
EWA10750
Securely support the motorcycle so
that there is no danger of it falling
over.2. Hold the lower ends of the front forklegs and try to move them forward
and backward. If any free play can
be felt, have a Yamaha dealer
check or repair the steering.
EAU23290
Checking the wheel bearingsThe front and rear wheel bearings must
be checked at the intervals specified in
the periodic maintenance and lubrication
chart. If there is play in the wheel hub or
if the wheel does not turn smoothly,
have a Yamaha dealer check the wheel
bearings.
EAUW0100
BatteryThe battery is located under the seat.
(See page 3-9).
This model is equipped with a sealed
type (MF) battery, which does not require
any maintenance. There is no need to
check the electrolyte or to add distilled
water.
ECA10620
Never attempt to remove the battery
cell seals, as this would permanently
damage the battery.
EWA10760
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Electrolyte is poisonous and
dangerous since it contains
sulfuric acid, which causes
severe burns. Avoid any contact
with skin, eyes or clothing and
always shield your eyes when
working near batteries. In case
of contact, administer the
following FIRST AID.l
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EXTERNAL: Flush with plenty
of water.
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INTERNAL: Drink large
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PERIODIC MAINTENANCE AND MINOR REPAIR
quantities of water or milk
and immediately call a
physician.
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EYES: Flush with water for 15
minutes and seek prompt
medical attention.
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Batteries produce explosive
hydrogen gas. Therefore, keep
sparks, flames, cigarettes, etc.,
away from the battery and
provide sufficient ventilation
when charging it in an enclosed
space.
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KEEP THIS AND ALL
BATTERIES OUT OF THE REACH
OF CHILDREN.1 2
1. Negative battery lead
2. Positive battery lead
To charge the battery
Have a Yamaha dealer charge the battery
as soon as possible, if it seems to have
discharged. Keep in mind that the battery
tends to discharge much quicker if the
vehicle is equipped with optional
electrical accessories.
To store the battery
1. If the motorcycle will not be used for more than one month, remove
the battery, fully charge it, and then
place it in a cool and dry place.
2. If the battery will be stored for more than two months, check it at least
once a month and fully charge it if
necessary.
3. Fully charge the battery before installation.
4. After installation, make sure that the battery leads are properly
connected to the battery terminals.
ECA10630
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Always keep the battery charged.
Storing a discharged battery can
cause permanent battery
damage.
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To charge a sealed-type (MF) battery, a special (constant-
voltage) battery charger is
required. Using a conventional
battery charger will damage the
battery. If you do not have access
to a sealed-type (MF) battery
charger, have a Yamaha dealer
charge your battery.
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6-26
6
PERIODIC MAINTENANCE AND MINOR REPAIR
EAU23624
Replacing the fusesThe main fuse and the fuse box, which
contains the fuses for the individual
circuits, are located under the seat. (See
page 3-9.)
20
1
2
1. Main fuse
2. Spare fuse1. Fuse box cover
2. Headlight fuse
3. Signaling system fuse
4. Fuel injection and ignition fuse
5. Display backup fuse
6. Spare fuse
If a fuse is blown, replace it as follows.
1. Turn the key to “OFF” and turn off the electrical circuit in question.
2. Remove the blown fuse, and then install a new fuse of the specified
amperage.Specified fuses:
Main fuse:20.0 A
Headlight fuse: 10.0 A
Signaling system fuse:
10.0 A
Ignition and fuel injection fuse: 10.0 A
Backup fuse: 10.0 A
Spare fuses:
10.0 A and 20.0 A
ECA10640
Do not use a fuse of a higher
amperage rating than recommended
to avoid causing extensive damage
to the electrical system and possibly
a fire.3. Turn the key to “ON” and turn on
the electrical circuit in question to check if the device operates.
4. If the fuse immediately blows again, have a Yamaha dealer check
the electrical system.
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6-27
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PERIODIC MAINTENANCE AND MINOR REPAIR
EAU23780
Replacing the headlight bulbThis model is equipped with a quartz
bulb headlight. If the headlight bulb burns
out, replace it as follows.1. Remove the headlight unit by removing the screws.
1
1. Screw2. Disconnect the headlight coupler,and then remove the bulb cover.
2
1
1. Headlight coupler
2. Bulb cover
3. Remove the headlight bulb holder
by turning it counterclockwise, and
then remove the defective bulb.1.Headlight bulb holder
EWA10790
Headlight bulbs get very hot.
Therefore, keep flammable products
away from a lit headlight bulb, and
do not touch the bulb until it has
cooled down.4. Place a new headlight bulb intoposition, and then secure it with
the bulb holder.
ECA10660
Do not touch the glass part of the
headlight bulb to keep it free from oil,
otherwise the transparency of the
glass, the luminosity of the bulb, and
the bulb life will be adversely affected.
Thoroughly clean off any dirt and
fingerprints on the headlight bulb
using a cloth moistened with alcohol
or thinner.1. Do not touch the glass part of the bulb5. Install the headlight bulb cover, andthen connect the coupler.
6. Install the headlight unit by installing the screws
7. Have a Yamaha dealer adjust the headlight beam if necessary.
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PERIODIC MAINTENANCE AND MINOR REPAIR
EAU24281
Replacing a turn signal light
bulb or the tail/brake light
bulb1. Remove the lens by removing thescrews.
1
1.Screw
1
1. Screw2. Remove the defective bulb bypushing it in and turning it
counterclockwise. 3. Insert a new bulb into the socket,
push it in, and then turn it clockwise
until it stops.
4. Install the lens by installing the screws.
ECA10680
Do not overtighten the screws,
otherwise the lens may break.
EAU37270
Replacing the auxiliary light
bulb
1
1. Auxiliary light bulbIf the auxiliary light bulb burns out,
replace it as follows.1. Remove the headlight unit by removing the screws.
2. Remove the socket (together with the bulb) by pulling it out.
3. Remove the defective bulb by pulling it out.
4. Insert a new bulb into the socket.
5. Install the socket (together with the bulb) by pushing it in.
6. Install the headlight unit by installing the screws.
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6-29
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PERIODIC MAINTENANCE AND MINOR REPAIR
EAU24350
Supporting the motorcycleSince this model is not equipped with a
centerstand, follow these precautions
when removing the front and rear wheel
or performing other maintenance
requiring the motorcycle to stand upright.
Check that the motorcycle is in a stable
and level position before starting any
maintenance. A strong wooden box can
be placed under the engine for added
stability.
To service the front wheel1. Stabilize the rear of the motorcycle by using a motorcycle stand or, if
an additional motorcycle stand is
not available, by placing a jack
under the frame in front of the rear
wheel.
2. Raise the front wheel off the ground by using a motorcycle stand.
To service the rear wheel
Raise the rear wheel off the ground by
using a motorcycle stand or, if a
motorcycle stand is not available, by
placing a jack either under each side of
the frame in front of the rear wheel or
under each side of the swingarm.
EAU24360
Front wheel
EAUW0180
To remove the front wheel
EWA10820
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It is advisable to have a Yamaha
dealer service the wheel.
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Securely support the motorcycle
so that there is no danger of it
falling over.
1. Loosen the front wheel axle pinch
bolt and the wheel axle.1 2
1. Wheel axle
2. Wheel axle pinch bolt
2. Lift the front wheel off the ground
according to the procedure on page
6-29.
3. Pull the wheel axle out, and then remove the wheel.
ECA11070
Do not apply the brake after the wheel
has been removed together with the
brake disc, otherwise the brake pads
will be forced shut.
EAUW0160
To install the front wheel1. Lift the wheel up between the fork legs.Make sure that there is enough space
between the brake pads before inserting
the brake disc into the caliper.2. Insert the wheel axle.
3. Lower the front wheel so that it ison the ground.
4. Tighten the wheel axle to the specified torque.
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6-30
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PERIODIC MAINTENANCE AND MINOR REPAIRTightening torque:Wheel axle:
60 Nm (6.0 m.kgf, 44 ft.lbt)5. Tighten the front fork pinch bolt to
the specified torque.Tightening torque:Front fork pinch bolt: 55 Nm (5.5 m.kgf, 40ft.lbt)6. Push down hard on the handlebar
several times to check for proper
fork operation.
EAU25080
Rear wheel
EAU25430
To remove the rear wheel
EWA10820
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It is advisable to have a Yamaha
dealer service the wheel.
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Securely support the motorcycle
so that there is no danger of it
falling over.
1. Loosen the axle nut and the brake
torque rod nut at the brake shoe
plate.
2. Lift the rear wheel off the ground according to the procedure on page
6-29.
3. Disconnect the brake torque rod from the brake shoe plate by
removing the nut and the bolt.
3
2
4 5
1. Drive chain slack adjusting nut
2. Brake torque rod
3. Locknut
4. Brake pedal free play adjusting nut
5. Axle nut4. Remove the brake pedal free play
adjusting nut, and then disconnect
the brake rod at the brake camshaft
lever.
5. Loosen the locknut and the drive chain adjusting nut on both ends
of the swingarm.
6. Remove the axle nut, and then pull the wheel axle out.
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PERIODIC MAINTENANCE AND MINOR REPAIR
7. Push the wheel forward, and thenremove the drive chain from the
rear sprocket.The drive chain does not need to be
disassembled in order to remove and
install the wheel.8. Remove the wheel.
EAUW0170
To install the rear wheel1. Insert the wheel axle from the left- hand side, and then install the drive
chain onto the rear sprocket.
2. Install the axle nut.
3. Install the brake rod onto the brake camshaft lever, and then install the
brake pedal free play adjusting nut. 4. Connect the brake torque rod to the
brake shoe plate by installing the
bolt and the nut, and then tighten
the nut to the specified torque.
Tightening torque:Brake torque rod nut: 49 Nm (4.9 m.kgf, 36 ft.lbt)5. Adjust the drive chain slack. (See
page 6-19.)
6. Lower the rear wheel so that it is on the ground.
7. Tighten the axle nut to the specified torque.Tightening torque:Axle nut: 104 Nm (10.4 m.kgf, 77 ft.lbt)8. Adjust the brake pedal position and
free play. (See page 6-16)
EWA10660
After adjusting the brake pedal free
play, check the operation of the brake
light.
EAU25850
TroubleshootingAlthough Yamaha motorcycles receive
a thorough inspection before shipment
from the factory, trouble may occur
during operation. Any problem in the
fuel, compression, or ignition systems,
for example, can cause poor starting
and loss of power.
The following troubleshooting chart
represents a quick and easy procedure
for checking these vital systems
yourself. However, should your
motorcycle require any repair, take it to
a Yamaha dealer, whose skilled
technicians have the necessary tools,
experience, and know-how to service the
motorcycle properly.
Use only genuine Yamaha replacement
parts. Imitation parts may look like
Yamaha parts, but they are often inferior,
have a shorter service life and can lead
to expensive repair bills.
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