2011 YAMAHA YBR250 torque
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PERIODIC MAINTENANCE AND ADJUSTMENT
6-1
6
EAU17241
Periodic inspection, adjustment, and lu-
brication will keep your vehicle in the
safest and most efficient condition pos-
sible. Safety is an obligation of the vehi-
cle owner/operator. The most important
points of vehicle inspection, adjust-
ment, and lubrication are explained on
the following pages.
The intervals given in the periodic
maintenance and lubrication chart
should be simply considered as a gen-
eral guide under normal riding condi-
tions. However, depending on the
weather, terrain, geographical location,
and individual use, the maintenance in-
tervals may need to be shortened.
WARNING
EWA10321
Failure to properly maintain the ve-
hicle or performing maintenance ac-
tivities incorrectly may increase
your risk of injury or death during
service or while using the vehicle. If
you are not familiar with vehicle ser-
vice, have a Yamaha dealer performservice.
WARNING
EWA15121
Turn off the engine when performing
maintenance unless otherwise
specified.
A running engine has moving
parts that can catch on body
parts or clothing and electrical
parts that can cause shocks or
fires.
Running the engine while ser-
vicing can lead to eye injury,
burns, fire, or carbon monoxide
poisoning – possibly leading to
death. See page 1-1 for more in-
formation about carbon monox-ide.
EAU17391
Owner’s tool kit The owner’s tool kit is located under the
seat. (See page 3-10.)
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. How-
ever, additional tools such as a torque
wrench may be necessary to perform
certain maintenance work correctly.TIPIf you do not have the tools or experi-
ence required for a particular job, havea Yamaha dealer perform it for you.1. Owner’s tool kit
2. Band
U5D1E1E0.book Page 1 Friday, September 5, 2008 1:17 PM
Page 41 of 80
PERIODIC MAINTENANCE AND ADJUSTMENT
6-8
6 3. Remove the spark plug as shown,
with the spark plug wrench includ-
ed in the owner’s tool kit.
To check the spark plug
1. Check that the porcelain insulator
around the center electrode of the
spark plug is a medium-to-light tan
(the ideal color when the vehicle is
ridden normally).
TIPIf the spark plug shows a distinctly dif-
ferent color, the engine could be oper-
ating improperly. Do not attempt to
diagnose such problems yourself. In-
stead, have a Yamaha dealer checkthe vehicle.2. Check the spark plug for electrode
erosion and excessive carbon or
other deposits, and replace it if
necessary.
To install the spark plug
1. Measure the spark plug gap with a
wire thickness gauge and, if nec-
essary, adjust the gap to specifica-
tion.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 tight-
en it to the specified torque.
TIPIf 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 speci-fied torque as soon as possible.
4. Install the spark plug cap.
5. Install the cowling.
1. Spark plug wrench
Specified spark plug:
NGK/DR8EA
1. Spark plug gap
Spark plug gap:
0.6–0.7 mm (0.024–0.028 in)
Tightening torque:
Spark plug:
17.5 Nm (1.75 m·kgf, 13 ft·lbf)
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Page 43 of 80
PERIODIC MAINTENANCE AND ADJUSTMENT
6-10
6 5. Remove the oil filter element drain
bolt to drain the oil from the oil filter
element.
TIPSkip steps 6–8 if the oil filter element isnot being replaced.
6. Remove the oil filter element cover
by removing the bolts.7. Remove and replace the oil filter
element and O-rings.
TIPMake sure that the O-rings are properlyseated.
8. Install the oil filter element cover by
installing the bolts, then tightening
them to the specified torque.
9. Install the engine oil drain bolt, and
then tighten it to the specified
torque.10. Install the oil filter element drain
bolt, and then tighten it to the spec-
ified torque.
11. Refill with the specified amount of
the recommended engine oil, and
then install and tighten the oil filler
bolt.
TIPBe sure to wipe off spilled oil on any
parts after the engine and exhaust sys-tem have cooled down.
1. Oil filter element cover bolt
2. Oil filter element drain bolt
1. Oil filter element
2. O-ring
Tightening torque:
Oil filter element cover bolt:
10 Nm (1.0 m·kgf, 7.4 ft·lbf)
Tightening torques:
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)
Recommended oil:
See page 8-1.
Oil quantity:
Without oil filter element replace-
ment:
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)
U5D1E1E0.book Page 10 Friday, September 5, 2008 1:17 PM
Page 53 of 80
PERIODIC MAINTENANCE AND ADJUSTMENT
6-20
6 4. If the drive chain slack is incorrect,
adjust it as follows.
EAU22822
To adjust the drive chain slack
1. Loosen the brake pedal free play
adjusting nut, axle nut, and locknut
at each end of the swingarm.2. To tighten the drive chain, turn the
drive chain slack adjusting nut at
each end of the swingarm in direc-
tion (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 for-
ward. NOTICE: Improper drive
chain slack will overload the en-
gine 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 with-
in the specified limits.
[ECA10571]
TIPUsing the alignment marks on each
side of the swingarm, make sure that
both adjusting nuts are in the same po-sition for proper wheel alignment.
3. Tighten both locknuts and the axle
nut to the specified torques.
4. Adjust the brake pedal free play.
(See page 6-16.)
WARNING
EWA10660
After adjusting the brake pedal free
play, check the operation of thebrake light.
1. Drive chain slack
1
1. Axle nut
2. Drive chain slack adjusting nut
3. Locknut
4. Alignment marks
Tightening torques:
Locknut:
16 Nm (1.6 m·kgf, 12 ft·lbf)
Axle nut:
104 Nm (10.4 m·kgf, 77 ft·lbf)
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Page 64 of 80
PERIODIC MAINTENANCE AND ADJUSTMENT
6-31
64. Remove the axle nut, pull the
wheel axle out, and then remove
the wheel. NOTICE: Do not apply
the brake after the wheel has
been removed together with the
brake disc, otherwise the brake
pads will be forced shut.
[ECA11071]
EAUW0160
To install the front wheel
1. Lift the wheel up between the fork
legs.TIPMake sure that there is enough space
between the brake pads before insert-ing the brake disc into the caliper.
2. Insert the wheel axle.
3. Lower the front wheel so that it is
on the ground.
4. Tighten the wheel axle to the spec-
ified torque.
5. Tighten the front fork pinch bolt to
the specified torque.6. Push down hard on the handlebar
several times to check for proper
fork operation.
EAU25080
Rear wheel
EAU25431
To remove the rear wheel
WARNING
EWA10821
To avoid injury, securely support the
vehicle so there is no danger of itfalling over.
1. Loosen the axle nut and the brake
torque rod nut at the brake shoe
plate.
Tightening torque:
Wheel axle:
60 Nm (6.0 m·kgf, 44 ft·lbf)
Tightening torque:
Front fork pinch bolt:
55 Nm (5.5 m·kgf, 40 ft·lbf)
1. Drive chain slack adjusting nut
2. Brake torque rod
3. Locknut
4. Brake pedal free play adjusting nut
5. Axle nut
U5D1E1E0.book Page 31 Friday, September 5, 2008 1:17 PM
Page 65 of 80
PERIODIC MAINTENANCE AND ADJUSTMENT
6-32
6 2. Lift the rear wheel off the ground
according to the procedure on
page 6-30.
3. Disconnect the brake torque rod
from the brake shoe plate by re-
moving the nut and the bolt.
4. Remove the brake pedal free play
adjusting nut, and then disconnect
the brake rod at the brake cam-
shaft 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.
7. Push the wheel forward, and then
remove the drive chain from the
rear sprocket.
TIPThe drive chain does not need to be
disassembled in order to remove andinstall the wheel.
8. Remove the wheel.
EAUW0170
To install the rear wheel
1. 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 tight-
en the nut to the specified torque.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 speci-
fied torque.
8. Adjust the brake pedal position
and free play. (See page 6-16.)
WARNING
EWA10660
After adjusting the brake pedal free
play, check the operation of thebrake light.
Tightening torque:
Brake torque rod nut:
49 Nm (4.9 m·kgf, 36 ft·lbf)
Tightening torque:
Axle nut:
104 Nm (10.4 m·kgf, 77 ft·lbf)
U5D1E1E0.book Page 32 Friday, September 5, 2008 1:17 PM