2007 YAMAHA YBR250 torque

6-1
6
PERIODIC MAINTENANCE AND MINOR REPAIR
EAU17240
Safety is an obligation of the owner.
Periodic inspection, adjustment and
lubrication will keep your vehicle in the
safest and most efficient condition
possible. The most important points of
inspection, adjustment, and lubrication
are explained on the following pages.
The intervals given in the periodic
maintenance and lubrication chart
should be simply considered as a
general guide under normal riding
conditions. However, DEPENDING ON
THE WEATHER, TERRAIN,
GEOGRAPHICAL LOCATION, AND
INDIVIDUAL USE, THE
MAINTENANCE INTERVALS MAY
NEED TO BE SHORTENED.
EWA10320
If you are not familiar with
maintenance work, have a Yamaha
dealer do it for you.
EAU17390
Owner’s tool kit1. Owner’s tool kit
2. BandThe owner’s tool kit is located under the
seat. (See page 3-9.)
The service information included in this
manual and the tools provided in the
owner’s tool kit are intended to assist
you in the performance of preventive
maintenance and minor repairs.
However, additional tools such as a
torque wrench may be necessary to
perform certain maintenance work
correctly.If you do not have the tools or experience
required for a particular job, have a
Yamaha dealer perform it for you.
EWA10350
Modifications not approved by
Yamaha may cause loss of
performance and render the vehicle
unsafe for use. Consult a Yamaha
dealer before attempting any changes.
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6-8
6
PERIODIC MAINTENANCE AND MINOR REPAIRSpecified spark plug:NGK / DR8EATo install the spark plug
1. Measure the spark plug gap with a wire thickness gauge and, if
necessary, adjust the gap to
specification.1. Spark plug gapSpark plug gap:0.6~0.7mm (0.024-0.028 in)2. Clean the surface of the spark plug
gasket and its mating surface, and
then wipe off any grime from the
spark plug threads.
3. Install the spark plug with the spark plug wrench, and then
tighten it to the specified torque. Tightening torque:
Spark plug:17.5 Nm (1.75 m.kgf, 13 ft.lbt)
If a torque wrench is not available when
installing a spark plug, a good estimate
of the correct torque is 1/4-1/2 turn past
finger tight. However, the spark plug
should be tightened to the specified
torque as soon as possible.4. Install the spark plug cap.
5. Install the cowling.
EAU37801
Engine oil and oil filter
elementThe engine oil level should be checked
before each ride. In addition, the oil must
be changed and the oil filter element
replaced at the intervals specified in the
General periodic maintenance and
lubrication chart.
To check the engine oil level 1. Place the vehicle on a level surface and hold it in an upright
position.Make sure that the vehicle is positioned
straight up when checking the oil level.
A slight tilt to the side can result in a
false reading.2. Start the engine, warm it up forseveral minutes, and then turn it
off.
3. Wait a few minutes until the oil settles, and then check the oil level
through the check window located
at the bottom-right side of the
crankcase.
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6-10
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PERIODIC MAINTENANCE AND MINOR REPAIR
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1. Oil filter element
2. O-ringMake sure that the O-rings are properly
seated.7. Install the oil filter element coverby installing the bolts, then
tightening them to the specified
torque.Tightening torque:Oil filter element cover bolt: 10 Nm (1,0 m.kgf, 7.4 ft.lbf)8. Install the engine oil drain bolt, and
then tighten it to the specified
torque.
9. Install the oil filter element drain bolt, and then tighten it to the
specified torque.
Tightening torque:Engine oil drain bolt: 20 Nm (2.0 m.kgf, 15 ft.lbf)
Oil filter element drain bolt: 7 Nm (0.7 m.kgf, 5.25 ft.lbf)10. Add the specified amount of the
recommended engine oil, and then
install and tighten the oil filler bolt.Recommended engine oil:See page 8-1
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)
ECA11620
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In order to prevent clutch
slippage (since the engine oil
also lubricates the clutch), do not
mix any chemical additives. Do
not use oils with a diesel
specification of “CD” or oils of a
higher quality than specified. In addition, do not use oils labeled
“ENERGY CONSERVING II” or
higher.
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Make sure that no foreign
material enters the crankcase.
11. Start the engine, and then let it idle
for several minutes while checking
it for oil leakage. If oil is leaking,
immediately turn the engine off and
check for the cause.
12. Turn the engine off, and then check the oil level and correct it if
necessary.
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6-19
6
PERIODIC MAINTENANCE AND MINOR REPAIR
EAU22760
Drive chain slackThe drive chain slack should be checked
before each ride and adjusted if
necessary.
EAU22772
To check the drive chain slack
1
1. Drive chain slack1. Place the motorcycle on thesidestand.When checking and adjusting the drive
chain slack, there should be no weight
on the motorcycle.2. Shift the transmission into theneutral position.
3. Move the rear wheel by pushing the motorcycle to locate the tightest portion of the drive chain,
and then measure the drive chain
slack as shown.
Drive chain slack:
25.0 - 35.0 mm (0.98 - 1.38 in)4. If the drive chain slack is incorrect,
adjust it as follows.
EAU22821
To adjust the drive chain slack1. Axle nut
2. Drive chain slack adjusting nut
3. Locknut
4. Alignment marks1. Loosen the brake pedal free playadjusting nut, axle nut, and locknut
at each end of the swingarm.
2. To tighten the drive chain, turn the adjusting nut at each end of the swingarm in direction (a). To loosen
the drive chain, turn the adjusting
nut at each end of the swingarm in
direction (b), and then push the rear
wheel forward.
Using the alignment marks on each side
of the swingarm, make sure that both
adjusting nuts are in the same position
for proper wheel alignment.
ECA10570
Improper drive chain slack will
overload the engine as well as other
vital parts of the motorcycle and can
lead to chain slippage or breakage.
To prevent this from occurring, keep
the drive chain slack within the
specified limits.3. Tighten both locknuts and the axle
nut to the specified torques.
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6-20
6
PERIODIC MAINTENANCE AND MINOR REPAIRTightening torques:Locknut:
16 Nm (1.6 m.kgf, 12 ft.lbt)
Axle nut: 104 Nm (10.4 m.kgf, 77 ft.lbt)4. Adjust the brake pedal free play.
(See page 6-16.)
EWA10660
After adjusting the brake pedal free
play, check the operation of the brake
light.
EAU23022
Cleaning and lubricating the
drive chainThe drive chain must be cleaned and
lubricated at the intervals specified in
the periodic maintenance and lubrication
chart, otherwise it will quickly wear out,
especially when riding in dusty or wet
areas. Service the drive chain as follows.
ECA10581
The drive chain must be lubricated
after washing the motorcycle and
riding in the rain.1. Clean the drive chain with keroseneand a small soft brush.
ECA11120
To prevent damaging the O-rings, do
not clean the drive chain with steam
cleaners, high-pressure washers or
inappropriate solvents.2. Wipe the drive chain dry.
3. Thoroughly lubricate the drive chain with a special O-ring chain
lubricant.
ECA11110
Do not use engine oil or any other
lubricants for the drive chain, as they
may contain substances that could
damage the O-rings.
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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
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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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6-31
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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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