ABS YAMAHA WR 250F 2017 Owner's Manual

FRONT BRAKE
5-17
EAS2GBB168INTRODUCTIONEWA
WARNING
If you need to disassemble the disc brake
components, observe the following precau-
tions.
• Never disassemble the brake components
unless absolutely necessary.
• If there is any problem with connections
on the hydraulic brake system, perform
the following jobs.
Disassemble the brake system, drain the
brake fluid, and clean it. After that, add a
suitable amount of brake fluid. Then, bleed
it after reassembly.
• Use only brake fluid for washing brake
components.
• Use new brake fluid for cleaning the brake
components.
• Immediately wipe off the spilled brake fluid
to avoid damage to painted surfaces or
plastic parts.
• Handle brake fluid with special care not to
let it enter your eyes so that you may not
lost your eyesight.
• FIRST AID FOR BRAKE FLUID ENTERING
THE EYES:
• Flush with water for 15 minutes and get
immediate medical attention.
EAS2GBB169CHECKING THE FRONT BRAKE DISC
1. Remove:
• Front wheel
Refer to “FRONT WHEEL” on page 5-4.
2. Check:
• Front brake disc
Damage/galling  Replace.
3. Measure:
• Brake disc thickness
Measure the brake disc thickness at a few
different locations.
Out of specification  Replace.4. Install:
• Front wheel
Refer to “FRONT WHEEL” on page 5-4.
EAS2GBB170REMOVING THE FRONT BRAKE CALIPER
TIP
Before disassembling the brake caliper, drain
the brake fluid from the entire brake system.
1. Remove:
• Union bolt
• Copper washers
• Brake hose
TIP
Put the end of the brake hose into a container
and pump out the brake fluid.
EAS2GBB171DISASSEMBLING THE FRONT BRAKE CAL-
IPER
1. Remove:
• Brake caliper piston “1”
• Brake caliper piston dust seal “2”
• Brake caliper piston seals “3”
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Blow compressed air into the brake hose
joint opening to force out the piston from the
brake caliper.
EWA
WARNING
• Cover the brake caliper piston with a rag.
Be careful not to get injured when the pis-
ton is expelled from the brake caliper.
• Never try to pry out the brake caliper pis-
ton.
Brake disc thickness limit
2.5 mm (0.10 in)
3
2
1

REAR BRAKE
5-27
EAS2GBB181INTRODUCTIONEWA
WARNING
If you need to disassemble the disc brake
components, observe the following precau-
tions.
• Never disassemble the brake components
unless absolutely necessary.
• If there is any problem with connections
on the hydraulic brake system, perform
the following jobs.
Disassemble the brake system, drain the
brake fluid, and clean it. After that, add a
suitable amount of brake fluid. Then, bleed
it after reassembly.
• Use only brake fluid for washing internal
brake components.
• Use new brake fluid for cleaning the brake
components.
• Immediately wipe off the spilled brake fluid
to avoid damage to painted surfaces or
plastic parts.
• Handle brake fluid with special care not to
let it enter your eyes so that you may not
lost your eyesight.
• FIRST AID FOR BRAKE FLUID ENTERING
THE EYES:
• Flush with water for 15 minutes and get
immediate medical attention.
EAS2GBB182CHECKING THE REAR BRAKE DISC
1. Remove:
• Rear wheel
Refer to “REAR WHEEL” on page 5-9.
2. Check:
• Brake disc
Damage/galling  Replace.
3. Measure:
• Brake disc thickness
Measure the brake disc thickness at a few
different locations.
Out of specification  Replace.
Refer to “CHECKING THE FRONT BRAKE
DISC” on page 5-17.
4. Measure:
• Brake disc deflection
Out of specification  Correct the brake disc
deflection or replace the brake disc.5. Adjust:
• Brake disc deflection
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Remove the brake disc.
b. Turn the mounted position of the brake disc
by one bolt hole.
c. Install the brake disc.
TIP
Tighten the brake disc bolts in stages and in a
crisscross pattern.
d. Measure the brake disc deflection.
e. If out of specification, repeat the adjustment
steps until the brake disc deflection is within
specification.
f. If the brake disc deflection cannot be
brought within specification, replace the
brake disc.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
6. Install:
• Rear wheel
Refer to “REAR WHEEL” on page 5-9. Brake disc thickness limit
3.5 mm (0.14 in)
Brake disc runout limit (as mea-
sured on wheel)
0.15 mm (0.0059 in)
Brake disc bolt
14 Nm (1.4 m·kgf, 10 ft·lbf)
LOCTITE®
T R..

REAR SHOCK ABSORBER ASSEMBLY
5-58
EAS2GBB207
REAR SHOCK ABSORBER ASSEMBLY
Removing the rear shock absorber assembly
Order Part name Q’ty Remarks
Seat Refer to “GENERAL CHASSIS” on page 5-1.
Side cover (left/right) Refer to “GENERAL CHASSIS” on page 5-1.
Air scoop (left/right) Refer to “GENERAL CHASSIS” on page 5-1.
Fuel tank Refer to “FUEL TANK” on page 8-1.
1 Rear shock absorber assembly lower bolt 1
2 Rear shock absorber assembly upper bolt 1
3 Rear shock absorber assembly 1
4 Locknut 1
5 Adjusting nut 1
6 Lower spring guide 1
7 Upper spring guide 1
8Spring 1
9 Dust seal 2
10 Collars 2
11 Bushing 1
2
12
1615
1413
12
14
4
5
7
6
83
9
9 10
10 11
1
New
New
13New
LS
LS
M
M
M
M
M

REAR SHOCK ABSORBER ASSEMBLY
5-59
12 Collars 2
13 O-ring 2
14 Dust seal 2
15 Stopper ring 1
16 Bearing 1
For installation, reverse the removal proce-
dure.
Removing the rear shock absorber assembly
Order Part name Q’ty Remarks
2
12
1615
1413
12
14
4
5
7
6
83
9
9 10
10 11
1
New
New
13New
LS
LS
M
M
M
M
M

REAR SHOCK ABSORBER ASSEMBLY
5-60
Disassembling the relay arm
Order Part name Q’ty Remarks
1 Relay arm 1
2 Connecting arm 1
3Collars 3
4Oil seals 6
5Washers 8
6 Bearing 6
For assembly, reverse the disassemble pro-
cedure.
5
3
5
6
165
4
5
5
4
5
6
6
5
4
3
2
4
6
6
3
4
4
T.R.80 Nm (8.0 mlbf) kgf, 58 ft
M
M
M
M
M MM

REAR SHOCK ABSORBER ASSEMBLY
5-61
EAS2GBB208HANDLING THE REAR SHOCK ABSORBEREWA
WARNING
This rear shock absorber contains highly
compressed nitrogen gas. Before handling
the rear shock absorber, read and make
sure that you understand the following in-
formation. The manufacturer cannot be held
responsible for property damage or person-
al injury that may result from improper han-
dling of the rear shock absorber.
• Do not tamper or attempt to open the rear
shock absorber.
• Do not subject the rear shock absorber to
an open flame or any other source of high
heat. High heat can cause an explosion
due to excessive gas pressure.
• Do not deform or damage the rear shock
absorber in any way. Rear shock absorber
damage will result in poor damping perfor-
mance.
TIP
A break-in is required up to about 50 km of run-
ning.
EAS2GBB209DISPOSING OF A REAR SHOCK ABSORB-
ER
Before disposing the rear shock absorber, be
sure to extract the nitrogen gas from valve “1”.
EWA
WARNING
• Wear protective glasses to prevent your
eyes from damage due to possible gas or
metal chips scattered.
• To dispose of a damaged or a worn-out
rear shock absorber, take the unit to your
Yamaha dealer for this disposal proce-
dure.
EAS2GBB210REMOVING THE REAR SHOCK ABSORBER
ASSEMBLY
1. Use a suitable stand to raise the rear wheel
off the ground.
EWA
WARNING
Securely support the vehicle so that there is
no danger of it falling over.
2. Remove:
• Rear shock absorber assembly lower bolt
“1”
TIP
While removing the rear shock absorber as-
sembly lower bolt, hold the swingarm so that it
does not drop down.
3. Remove:
• Rear shock absorber assembly upper bolt
• Rear shock absorber assembly
EAS2GBB211REMOVING THE BEARING
1. Remove:
• Stopper ring (upper bearing) “1”
TIP
Press in the bearing while pressing its outer
race and remove the stopper ring.
1
1

REAR SHOCK ABSORBER ASSEMBLY
5-62
2. Remove:
• Upper bearing “1”
TIP
Remove the bearing by pressing its outer race.
3. Remove:
• Lower bearing “1”
TIP
Remove the bearing by pressing its outer race.
EAS2GBB212CHECKING THE REAR SHOCK ABSORBER
ASSEMBLY
1. Check:
• Rear shock absorber rod
Bends/damage  Replace the rear shock
absorber assembly.
• Rear shock absorber
Gas leaks/oil leaks  Replace the rear
shock absorber assembly.
•Spring
Damage/wear  Replace.
• Spring guide
Damage/wear  Replace.
• Bearing
Damage/wear  Replace.
•Bolts
Bends/damage/wear  Replace.
EAS2GBB213CHECKING THE CONNECTING ARM AND
RELAY ARM
1. Check:
• Connecting arm
• Relay arm
Damage/wear  Replace.
2. Check:
• Bearing
• Spacers
Damage/pitting/scratches  Replace the
bearings and spacers as a set.
3. Check:
• Oil seals
Damage/pitting  Replace.
EAS2GBB214INSTALLING THE RELAY ARM
1. Lubricate:
• Oil seals
• Bearing
• Spacers
• Washers
•Collars
2. Install:
• Bearing “1”
• Washer “2”
• Oil seals “3”
(to relay arm “4”)
3. Install:
• Bearing “1”
• Oil seals “2”
(to connecting arm “3”)
1
Recommended lubricant
Molybdenum disulfide grease
Installed depth “a”
0 mm (0 in)
Installed depth “a”
0 mm (0 in)
New
3 3
43
2 2
22
a
1
11
New

REAR SHOCK ABSORBER ASSEMBLY
5-63
EAS2GBB215INSTALLING THE REAR SHOCK ABSORB-
ER ASSEMBLY
1. Lubricate:
• Bearing (lower side)
•Dust seal
•Collars
• Bushing
ECA
NOTICE
Do not apply the grease to the bearing outer
race because it will wear the rear shock ab-
sorber surface on which the bearing is
press fitted.
2. Lubricate:
• O-ring
3. Install:
• Bearing
• Stopper ring
(to rear shock absorber assembly (upper
side))
TIP
• Install the bearing parallel until the stopper
ring groove appears by pressing its outer
race.
• After installing the stopper ring, push back the
bearing unit it contacts the stopper ring.
4. Install:
• Bearing “1”
• Bushing “2”
• Collar “3”
• Dust seal “4”
(to rear shock absorber assembly (lower
side))
TIP
Install the dust seals with their lips facing in-
ward.
5. Lubricate:
• Connecting arm and frame bolt
• Relay arm and connecting arm bolt
• Relay arm and swingarm bolt
(circumference and threaded portion)
• Rear shock absorber assembly upper bolt
• Rear shock absorber assembly lower bolt
6. Install:
• Rear shock absorber assembly
TIP
• When installing the rear shock absorber as-
sembly, lift up the swingarm.
• Install the rear shock absorber assembly up-
per bolt, and connecting arm bolt (frame side)
from the right.
• Install the rear shock absorber assembly low-
er bolts, connecting arm bolt (relay arm side),
and relay arm bolt (swingarm side) from the
left.
7. Tighten:
• Rear shock absorber assembly upper bolt
• Connecting arm bolt (frame side) Recommended lubricant
Molybdenum disulfide grease
Recommended lubricant
Lithium-soap-based grease
3
a 1
12
a
2
New
Installed depth “a”
4.25 mm (0.17 in)
Recommended lubricant
Molybdenum disulfide grease
Rear shock absorber assembly
upper bolt
56 Nm (5.6 m·kgf, 41 ft·lbf)
Connecting arm bolt (frame side)
80 Nm (8.0 m·kgf, 58 ft·lbf)
T R..
T R..

REAR SHOCK ABSORBER ASSEMBLY
5-64
• Connecting arm bolt (relay arm side)
• Relay arm bolt (swingarm side)
• Rear shock absorber assembly lower boltConnecting arm bolt (relay arm
side)
80 Nm (8.0 m·kgf, 58 ft·lbf)
Relay arm bolt (swingarm side)
70 Nm (7.0 m·kgf, 51 ft·lbf)
Rear shock absorber assembly
lower bolt
53 Nm (5.3 m·kgf, 38 ft·lbf)
T R..
T R..
T R..

ENGINE REMOVAL
6-1
EAS2GBB225
TIP
This section is intended for those who have basic knowledge and skill concerning the servicing of
Yamaha motorcycles (e.g., Yamaha dealers, service engineers, etc.). Those who have little knowl-
edge and skill concerning servicing are requested not to undertake inspection, adjustment, disas-
sembly, or reassembly only by reference to this manual. It may lead to servicing trouble and
mechanical damage.
EAS2GBB226
ENGINE REMOVAL
Removing the exhaust pipe
Order Part name Q’ty Remarks
Refer to “INSTALLING THE EXHAUST
PIPE AND MUFFLER” on page 6-10.
Side cover (right) Refer to “GENERAL CHASSIS” on page 5-1.
Rear shock absorber assembly lower boltRefer to “REAR SHOCK ABSORBER AS-
SEMBLY” on page 5-58.
Connecting arm bolt (frame side)Refer to “REAR SHOCK ABSORBER AS-
SEMBLY” on page 5-58.
1 Silencer clamp 1 Loosen.
2 Silencer 1
3 Exhaust pipe 2 clamp 1 Loosen.
4 Exhaust pipe 2 1
105 9
26
1
66
3
84 7 (4) (6)
30 Nm (3.0 m kgf, 22 ft Ibf)T
.R.
30 Nm (3.0 m kgf, 22 ft Ibf)T
.R.
New
New
10 Nm (1.0 m kgf, 7.2 ft Ibf)T.R.
12 Nm (1.2 m kgf, 8.7 ft Ibf)T.R.12 Nm (1.2 m kgf, 8.7 ft Ibf)T.R.
20 Nm (2.0 m kgf, 14 ft Ibf)T
.R.New
LT
LT
10 Nm (1.0 m kgf, 7.2 ft Ibf)T.R.9 Nm (0.9 m kgf, 6.5 ft Ibf)T
.R.
5 Nm (0.5 m kgf, 3.6 ft Ibf)T
.R.
T
.R.*kgf 13 Nm (1.3 m , 9.4 ft lbf)
kgf, 14 ft 20 Nm (2.0 m lbf)
*