2015 YAMAHA WR 250F relay

PERIODIC MAINTENANCE
3-8
SWINGARM
Inspect, lube and
retightenMolybdenum disulfide grease
RELAY ARM, CON-
NECTING ROD
Inspect, lube and
retightenMolybdenum disulfide grease
SIDESTAND
Lubricate Lithium-soap-based grease
STEERING HEAD
Inspect free play
and retighten
Clean and lube Lithium-soap-based grease
Replace bearing
TIRE, WHEELS
Inspect air pres-
sure, wheel run-
out, tire wear and
spoke looseness
Retighten sprocket
bolt
Inspect bearings
Replace bearings
Lubricate Lithium-soap-based grease
THROTTLE, CON-
TROL CABLE
Check routing and
connection
LubricateYamaha cable lube or SAE
10W-30 motor oil ITEMAfter
break-
inEvery
raceEvery
third
(or
500
km)Every
fifth
(or
1,000
km)As re-
quiredRemarks

HANDLEBAR................................................................................................. 5-33
REMOVING THE HANDLEBAR............................................................... 5-35
CHECKING THE HANDLEBAR ............................................................... 5-35
INSTALLING THE HANDLEBAR ............................................................. 5-35
FRONT FORK................................................................................................. 5-40
REMOVING THE FRONT FORK LEGS ................................................... 5-42
DISASSEMBLING THE FRONT FORK LEGS ......................................... 5-42
CHECKING THE FRONT FORK LEGS ................................................... 5-43
ASSEMBLING THE FRONT FORK LEGS ............................................... 5-44
INSTALLING THE FRONT FORK LEGS ................................................. 5-50
STEERING HEAD........................................................................................... 5-53
REMOVING THE LOWER BRACKET...................................................... 5-54
CHECKING THE STEERING HEAD ........................................................ 5-54
INSTALLING THE STEERING HEAD ...................................................... 5-54
REAR SHOCK ABSORBER ASSEMBLY..................................................... 5-57
HANDLING THE REAR SHOCK ABSORBER ......................................... 5-60
DISPOSING OF A REAR SHOCK ABSORBER ...................................... 5-60
REMOVING THE REAR SHOCK ABSORBER ASSEMBLY.................... 5-60
REMOVING THE BEARING..................................................................... 5-60
CHECKING THE REAR SHOCK ABSORBER ASSEMBLY .................... 5-61
CHECKING THE CONNECTING ARM AND RELAY ARM ...................... 5-61
INSTALLING THE RELAY ARM............................................................... 5-61
INSTALLING THE REAR SHOCK ABSORBER ASSEMBLY .................. 5-62
SWINGARM.................................................................................................... 5-64
REMOVING THE SWINGARM................................................................. 5-65
REMOVING THE BEARING..................................................................... 5-65
CHECKING THE SWINGARM ................................................................. 5-65
INSTALLING THE SWINGARM ............................................................... 5-66
CHAIN DRIVE................................................................................................. 5-67
REMOVING THE DRIVE CHAIN.............................................................. 5-68
CHECKING THE DRIVE CHAIN .............................................................. 5-68
CHECKING THE DRIVE SPROCKET...................................................... 5-69
CHECKING THE REAR WHEEL SPROCKET ......................................... 5-69
INSTALLING THE DRIVE CHAIN ............................................................ 5-69

REAR SHOCK ABSORBER ASSEMBLY
5-59
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
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.
EAS2GB2214CHECKING 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.
EAS2GB2215CHECKING 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.
EAS2GB2216INSTALLING THE RELAY ARM
1. Lubricate:
• Oil seals
• Bearing
• Spacers
• Washers
•Collars
2. Install:
• Bearing “1”
• Washer “2”
• Oil seals “3”
(to relay arm “4”)
1
Recommended lubricant
Molybdenum disulfide grease
Installed depth “a”
0 mm (0 in)
New
3 3
43
2 2
22
a
1
11

REAR SHOCK ABSORBER ASSEMBLY
5-62
3. Install:
• Bearing “1”
• Oil seals “2”
(to connecting arm “3”)
EAS2GB2217INSTALLING 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 Installed depth “a”
0 mm (0 in)
Recommended lubricant
Molybdenum disulfide grease
Recommended lubricant
Lithium-soap-based grease
New
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)
T R..

REAR SHOCK ABSORBER ASSEMBLY
5-63
• Connecting arm bolt (frame side)
• Connecting arm bolt (relay arm side)
• Relay arm bolt (swingarm side)
• Rear shock absorber assembly lower boltConnecting arm bolt (frame side)
80 Nm (8.0 m·kgf, 58 ft·lbf)
Connecting 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..
T R..

FUEL TANK
8-4
EAS2GB2346REMOVING THE FUEL SENDER
1. Remove:
• Fuel sender
ECA
NOTICE
Do not drop the fuel sender or give it a
strong shock.
EAS2GB2347CHECKING THE FUEL SENDER
1. Disconnect:
• Fuel pump coupler
• Fuel sender coupler
(from the wire harness)
2. Disconnect:
• Starter motor lead
(from starter relay)
3. Remove:
• Fuel tank
4. Remove:
• Fuel sender
(from the fuel tank)
5. Connect:
• Fuel sender coupler
6. Push the start switch.
7. Check:
• Fuel level warning light
Out of specification  Replace the fuel
sender.
EAS2GB2348INSTALLING THE FUEL SENDER
1. Install:
• Fuel sender gasket
• Fuel sender
TIP
• Do not damage the installation surfaces of the
fuel tank when installing the fuel sender.
• Always use a new fuel sender gasket.
• Install the fuel sender as shown in the illustra-
tion.
• When install the fuel sender, make sure that
the projection “a” faces the rear of the vehicle.
EAS2GB2349INSTALLING THE FUEL TANK
1. Install:
• Fuel tank
2. Connect:
• Fuel hose
ECA
NOTICE
• Connect the fuel hose securely, and check
that the orientation of the installed fuel
hose holder is correct.
• Take care not to kink or pinch the fuel
hose.
Fuel pump is atmosphere “A”
 Fuel level warning light is come on
Fuel pump is soaked in fuel “B”
Fuel level warning light is goes off
a
b
4 1
2
6
53
Fuel sender bolts
4.0 Nm (0.40 m·kgf, 2.9 ft·lbf)
AB
New
T R..
a

ELECTRICAL COMPONENTS....................................................................... 9-60
CHECKING THE SWITCHES .................................................................. 9-64
CHECKING THE BULBS AND BULB SOCKETS .................................... 9-67
CHECKING THE FUSES ......................................................................... 9-68
CHECKING AND CHARGING THE BATTERY ........................................ 9-69
CHECKING THE RELAYS ....................................................................... 9-72
CHECKING THE DIODE .......................................................................... 9-73
CHECKING THE IGNITION SPARK GAP................................................ 9-73
CHECKING THE SPARK PLUG CAP ...................................................... 9-73
CHECKING THE IGNITION COIL ............................................................ 9-74
CHECKING THE CRANKSHAFT POSITION SENSOR........................... 9-74
CHECKING THE LEAN ANGLE SENSOR............................................... 9-75
CHECKING THE STARTER MOTOR OPERATION ................................ 9-75
CHECKING THE STATOR COIL ............................................................. 9-76
CHECKING THE RECTIFIER/REGULATOR ........................................... 9-76
CHECKING THE SPEED SENSOR ......................................................... 9-77
CHECKING THE FUEL SENDER ............................................................ 9-77
CHECKING THE RESISTER ................................................................... 9-77
CHECKING THE RADIATOR FAN MOTOR ............................................ 9-78
CHECKING THE COOLANT TEMPERATURE SENSOR........................ 9-78
CHECKING THE THROTTLE POSITION SENSOR ................................ 9-79
CHECKING THE THROTTLE POSITION SENSOR INPUT VOLTAGE .. 9-79
CHECKING THE INTAKE AIR PRESSURE SENSOR ............................ 9-80
CHECKING THE INTAKE AIR TEMPERATURE SENSOR ..................... 9-80
CHECKING THE FUEL INJECTOR ......................................................... 9-81