2008 YAMAHA WR 250R wheel torque

PERIODIC MAINTENANCE AND MINOR REPAIR
6-25
2
3
4
5
67
8
9

EAU22760
Drive chain slack
The drive chain slack should be
checked before each ride and adjusted
if necessary.
EAU22773
To check the drive chain slack
1. Place the motorcycle on the side-
stand.
NOTE:

When checking and adjusting the drive
chain slack, there should be no weight
on the motorcycle.
2. Shift the transmission into the neu-
tral position.
3. Move the rear wheel by pushing
the motorcycle to locate the tight-
est portion of the drive chain, and
then measure the drive chain slack
as shown.4. If the drive chain slack is incorrect,
adjust it as follows.
EAU22942
To adjust the drive chain slack
1. Loosen the axle nut and the lock-
nut on each side of the swingarm.
2. To tighten the drive chain, turn the
adjusting bolt on each side of the
swingarm in direction (a). To loos-
en the drive chain, turn the adjust-
ing bolt on each side of the
swingarm in direction (b), and then
push the rear wheel forward.
NOTE:

Using the alignment marks on each
side of the swingarm, make sure thatboth chain pullers are in the same posi-
tion for proper wheel alignment.
CAUTION:

ECA10570
Improper drive chain slack will over-
load 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 the locknuts, and then
tighten the axle nut to the specified
torque.
Drive chain slack:
38.0–48.0 mm (1.50–1.89 in)
1. Drive chain slack
1

1. Axle nut
2. Drive chain slack adjusting bolt
3. Locknut
1
23
(b)
(a)

PERIODIC MAINTENANCE AND MINOR REPAIR
6-38
1
2
3
4
5
6
7
8
9
2. Lift the front wheel off the ground
according to the procedure on
page 6-37.
3. Remove the axle nut.
4. Pull the wheel axle out, and then
remove the wheel.
CAUTION:

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.
EAU45170
To install the front wheel
1. Lift the wheel up between the forklegs.
NOTE:

Make sure that there is enough space
between the brake pads before install-
ing the brake caliper onto the brake
disc.
2. Insert the wheel axle.
3. Install the wheel axle pinch bolts
and axle nut.
4. Lower the front wheel so that it is
on the ground.
5. Tighten the axle nut and the wheel
axle pinch bolts to their specified
torques.
6. Push down hard on the handlebar
several times to check for proper
fork operation.
EAU25080
Rear wheel
EAU45180
To remove the rear wheel
WARNING

EWA10820

It is advisable to have a Yamaha
dealer service the wheel.

Securely support the motorcy-
cle so that there is no danger of
it falling over.
1. Loosen the axle nut.
2. Lift the rear wheel off the ground
according to the procedure on
page 6-37.
3. Remove the axle nut and washer.
4. Loosen the locknut and drive chain
adjusting bolt on each side of the
swingarm.
1. Front wheel axle pinch bolt
2. Wheel axle
1
2

Tightening torques:
Axle nut:
63 Nm (6.3 m·kgf, 45.6 ft·lbf)
Wheel axle pinch bolt:
23 Nm (2.3 m·kgf, 16.6 ft·lbf)

PERIODIC MAINTENANCE AND MINOR REPAIR
6-39
2
3
4
5
67
8
9
5. While supporting the brake caliper,
pull the wheel axle out.6. Push the wheel forward, and then
remove the drive chain from the
rear sprocket.
NOTE:

The drive chain does not need to be
disassembled in order to remove and
install the rear wheel.
7. Remove the wheel.
CAUTION:

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.
EAU45190
To install the rear wheel
1. Install the wheel and the brake cal-
iper bracket by inserting the wheel
axle from the left-hand side.
NOTE:


Make sure that the retainer on the
brake caliper bracket is inserted
into the slot in the swingarm.

Make sure that there is enough
space between the brake pads be-
fore installing the wheel.2. Install the drive chain onto the rear
sprocket.
3. Install the washer and the axle nut,
and then lower the rear wheel so
that it is on the ground.
4. Adjust the drive chain slack. (See
page 6-25.)
5. Tighten the axle nut to the speci-
fied torque.
1. Axle nut
2. Washer
3. Drive chain slack adjusting bolt
4. Locknut
5. Brake caliper
1. Wheel axle
1
34
2
51

1. Brake caliper bracket
2. Retainer
3. Slot
Tightening torque:
Axle nut:
125 Nm (12.5 m·kgf, 90.4 ft·lbf)
1
2
3