2004 YAMAHA WR 250F relay

MAINTENANCE SPECIFICATIONS
2 - 15
SPEC
Part to be tightened Thread size Q’tyTightening torque
Nm m·kg ft·lb
Nipple (spoke)—72 3 0.3 2.2
Rear wheel sprocket M8 × 1.25 6 50 5.0 36
Rear brake disc cover M6 × 1.0 2 7 0.7 5.1
Rear brake caliper protector M6 × 1.0 2 7 0.7 5.1
Drive chain puller adjust bolt and locknut M8 × 1.25 2 16 1.6 11
Engine mounting:
Engine and engine bracket (front) M10 × 1.25 1 69 6.9 50
Engine and frame (lower) M10 × 1.25 1 69 6.9 50
Engine bracket and frame M8 × 1.25 6 34 3.4 24
Engine and engine bracket (upper) M10 × 1.25 1 55 5.5 40
Lower engine guard M6 × 1.0 3 10 1.0 7.2
Left engine guard M8 × 1.25 2 23 2.3 17
Right engine guard M8 × 1.25 2 23 2.3 17
Regulator bracket and frame M6 × 1.0 2 7 0.7 5.1
Regulator M6 × 1.0 2 7 0.7 5.1
Pivot shaft and nut M16 × 1.5 1 85 8.5 61
Relay arm and swingarm M14 × 1.5 1 80 8.0 58
Relay arm and connecting rod M14 × 1.5 1 80 8.0 58
Connecting rod and frame M14 × 1.5 1 80 8.0 58
Rear shock absorber and frame M10 × 1.25 1 56 5.6 40
Rear shock absorber and relay arm M10 × 1.25 1 53 5.3 38
Rear frame (upper) M8 × 1.25 1 32 3.2 23
Rear frame (lower) M8 × 1.25 2 29 2.9 21
Swingarm and brake hose holder M5 × 0.8 4 1 0.1 0.7
Swingarm and patch M4 × 0.7 4 2 0.2 1.4
Upper drive chain tensioner M8 × 1.25 1 19 1.9 13
Lower drive chain tensioner M8 × 1.25 1 20 2.0 14
Drive chain support M6 × 1.0 3 7 0.7 5.1
Seal guard and swingarm M5 × 0.8 4 6 0.6 4.3
Fuel tank M6 × 1.0 2 10 1.0 7.2
Fuel cock M6 × 1.0 2 7 0.7 5.1
Seat set bracket and fuel tank M6 × 1.0 1 7 0.7 5.1
Hooking screw (fitting band) and fuel tank M6 × 1.0 1 7 0.7 5.1
Fuel tank bracket and fuel tank M6 × 1.0 4 7 0.7 5.1
Air scoop and fuel tank M6 × 1.0 6 6 0.6 4.3
Air scoop and radiator guard (lower) M6 × 1.0 2 6 0.6 4.3
Front fender M6 × 1.0 4 7 0.7 5.1
Rear fender (front) M6 × 1.0 2 7 0.7 5.1
Rear fender (rear) M6 × 1.0 2 11 1.1 8.0
Side cover M6 × 1.0 2 7 0.7 5.1
Seat M8 × 1.25 2 23 2.3 17
Trip meter M6 × 1.0 2 7 0.7 5.1
Meter cable holder and front fork protector M5 × 0.8 2 4 0.4 2.9

MAINTENANCE SPECIFICATIONS
2 - 18
SPEC
NOTE:
Tighten the rotor nut to 65 Nm (6.5 m  kg, 47 ft  lb), loosen and retighten the rotor nut to 65 Nm
(6.5 m  kg, 47 ft  lb). Starter relay:
Model/manufacturer 2768090-A/JIDECO ----
Amperage rating 180 A ----
Coil winding resistance 4.2 ~ 4.6 Ω at 20 °C (68 °F) ----
Starting circuit cut-off relay:
Model/manufacturer ACM33221 M06/MATSUSHITA ----
Coil winding resistance 75.69 ~ 92.51 Ω at 20 °C (68 °F) ----
Fuse (amperage × quantity):
Main fuse 10 A × 1 ----
Reserve fuse 10 A × 1 ----
Part to be tightened Thread size Q’tyTightening torque
Nm m·kg ft·lb
Stator M5 × 0.8 2 7 0.7 5.1
Holder (AC magneto lead) M5 × 0.8 2 7 0.7 5.1
Rotor M12 × 1.25 1 Refer to NOTE.
Neutral switch M5 × 0.8 2 4 0.4 2.9
Starter motor M6 × 1.0 2 10 1.0 7.2
Starter relay terminal M6 × 1.0 2 4 0.4 2.9
Negative lead and cylinder head M6 × 1.0 1 10 1.0 7.2 Item Standard Limit

SPEC
2 - 109
CABLE ROUTING DIAGRAM
1Starter motor lead
2Negative battery lead
3Wire harness
4Clamp
5Taillight lead
6Coolant reservoir breather hose
7Coolant reservoir hose
8Positive battery lead
9Starting circuit cut-off relay
0BatteryÈPosition the starter motor lead, negative battery lead and wire
harness in the tank damper slit.
ÉFasten the wire harness.
ÊDo not allow the taillight lead to slacken.
ËFasten the coolant reservoir breather hose and coolant reser-
voir hose.
ÌPass the coolant reservoir hose on the outside of the coolant
reservoir breather hose.

3 - 3
INSP
ADJ
MAINTENANCE INTERVALS
*marked: For USAFRONT FORKS
Inspect and adjust
Replace oilSuspension oil “01”
Replace oil seal
FRONT FORK OIL SEAL AND DUST SEAL
Clean and lubeLithium base grease
REAR SHOCK ABSORBER
Inspect and adjust
Lube
(After
rain
ride)Molybdenum disulfide
grease
Retighten
DRIVE CHAIN GUIDE AND ROLLERS
Inspect
DRIVE CHAIN STOPPER
Inspect
SWINGARMMolybdenum disulfide
grease
Inspect, lube and retighten
RELAY ARM, CONNECTING ROD Molybdenum disulfide
grease
Inspect, lube and retighten
SIDESTAND
LubricateLithium base grease
STEERING HEAD
Inspect free play and retighten
Clean and lubeLithium base grease
Replace bearing
TIRE, WHEELS
Inspect air pressure, wheel run-out, tire
wear and spoke looseness
Retighten sprocket bolt
Inspect bearings
Replace bearings
LubricateLithium base grease
THROTTLE, CONTROL CABLE Yamaha cable lube or SAE
10W-30 motor oil
Inspect dirt and wear on the
throttle cable on the
carburetor side. Check routing and connection
Lubricate
Inspect and clean (throttle cable)
HOT STARTER, CLUTCH LEVER
Inspect free play
BATTERY
Check terminal for looseness and
corrosionItemAfter
break-inEvery
race
Every third
(or
500 km)Every fifth
(or
1,000 km)As
requiredRemarks

5 - 119
CHASSWINGARM
EC570000
SWINGARM
Extent of removal:
1 Swingarm removal
Extent of removal Order Part name Q’ty Remarks
SWINGARM REMOVAL
WARNING
Support the machine securely so there is nodanger of it falling over. Preparation for removal Hold the machine by placing the suitable
stand under the engine.
Brake hose holder
Refer to “FRONT BRAKE AND REAR BRAKE”
section.
Rear brake caliper
Bolt (brake pedal) Shift the brake pedal backward.
Drive chain
1 Drive chain support 1
2 Lower chain tensioner 1
3 Bolt (rear shock absorber-relay arm) 1 Hold the swingarm.
4 Bolt (connecting rod) 1
5 Pivot shaft 1
6 Swingarm 1
1

5 - 123
CHASSWINGARM
EC578000SWINGARM DISASSEMBLY
Extent of removal:
1 Swingarm disassembly
2 Connecting rod removal and disassembly
3 Relay arm removal and disassembly
Extent of removal Order Part name Q’ty Remarks
SWINGARM DISASSEMBLY
1 Cap 2
2 Relay arm 1
3 Connecting rod 1
4 Collar 2
5 Oil seal 2
6 Thrust bearing 2
7 Bushing 2
8 Oil seal 8
9 Bearing 8 Refer to “REMOVAL POINTS”.
1
2
3
23

5 - 127
CHASSWINGARM
EC573000REMOVAL POINTSEC573200Bearing
1. Remove:
Bearing
1
NOTE:Remove the bearing by pressing its
outer race.
INSPECTION
Wash the bearings, bushings, col-
lars, and covers in a solvent.
Swingarm
1. Inspect:
Bearing
1
Bushing
2
Free play exists/unsmooth
revolution/rust
→ Replace
bearing and bushing as a set.
2. Inspect:
Oil seal
3
Damage
→ Replace.
EC574210Relay arm
1. Inspect:
Bearing (polylube bearing)
1
Collar
2
Free play exists/unsmooth
revolution/rust
→ Replace
bearing and collar as a set.
2. Inspect:
Bearing (polylube bearing)
1
Loss of solid lubrication
→
Replace.
Oil seal
3
Damage
→ Replace.
NOTE:Polylube bearings, with solid lubrica-
tion, have been adopted with the
intent to make the needle bearings,
used in this model, maintenance
free. With polylube bearings, no
grease nipple and regular lubrication
is necessary. However, grease
should be applied to all oil seals and
collars when removed or installed.
POINTS DE DEPOSE
Roulement
1. Déposer:
Roulement 1
N.B.:
Retirer le roulement en appuyant sur la
cage extérieure.
CONTROLE
Laver les roulements, les bagues, les col-
lerettes et les caches dans un dissolvant.
Bras oscillant
1. Contrôler:
Roulement 1
Bague 2
Jeu/rotation irrégulière/rouille →
Remplacer à la fois le roulement
et la bague.
2. Contrôler:
Bague d’étanchéité 3
Endommagement → Changer.
Bras de relais
1. Contrôler:
Roulement
(roulement polylube) 1
Collerette 2
Jeu/rotation irrégulière/rouille →
Remplacer à la fois le roulement
et la collerette.
2. Contrôler:
Roulement
(roulement polylube) 1
Perte de lubrification solide →
Remplacer.
Bague d’étanchéité 3
Endommagement → Remplacer.
N.B.:
Les roulements polylube, à lubrification
solide, ont été adoptés pour éliminer la
maintenance des roulements à aiguilles,
utilisés sur ce modèle. Les roulements
polylube rendent le graissage par les
graisseurs et le graissage ordinaire inuti-
les. Tous les colliers et joints à huile doi-
vent néanmoins être graissés lorsqu’ils
sont retirés ou installés.
BRAS OSCILLANT

5 - 131
CHASSWINGARM
2. Install:
Bearing
1
Oil seal
2
To relay arm.
NOTE:Apply the molybdenum disulfide
grease on the bearing when install-
ing.
Install the bearing by pressing it on
the side having the manufacture’s
marks or numbers.
Installed depth of
bearings a
:
5 mm (0.20 in)
3. Install:
Bearing
1
Oil seal
2
To connecting rod.
NOTE:Apply the molybdenum disulfide
grease on the bearing when install-
ing.
Install the bearing by pressing it on
the side having the manufacture’s
marks or numbers.
Installed depth of
bearings a
:
5 mm (0.20 in)
Swingarm
1. Install:
Bushing
1
Thrust bearing
2
Oil seal
3
Collar
4
To swingarm
5.
NOTE:Apply the molybdenum disulfide
grease on the bushings, thrust bear-
ings and oil seal lips.
2. Install:
Collar
1
To relay arm
2.
NOTE:Apply the molybdenum disulfide
grease on the collars and oil seal
lips.
2. Monter:
Roulement 1
Bague d’étanchéité 2
Sur le bras relais.
N.B.:
Appliquer une graisse au bisulfure de
molybdène sur le roulement lors de la
repose.
Installer le roulement en appuyant sur
le côté où figurent les repères ou
numéros du fabricant.
Profondeur d’installation
des roulements a:
5 mm (0,20 in)
3. Monter:
Roulement 1
Bague d’étanchéité 2
Sur la bielle.
N.B.:
Appliquer une graisse au bisulfure de
molybdène sur le roulement lors de la
repose.
Installer le roulement en appuyant sur
le côté où figurent les repères ou
numéros du fabricant.
Profondeur d’installation
des roulements a:
5 mm (0,20 in)
Bras oscillant
1. Monter:
Bague 1
Roulement de butée 2
Bague d’étanchéité 3
Collerette 4
Sur le bras oscillant 5.
N.B.:
Appliquer de la graisse au bisulfure de
molybdène sur les bagues, les roule-
ments de butée et les lèvres de bague
d’étanchéité.
2. Monter:
Collerette 1
Sur le bras de relais 2.
N.B.:
Appliquer de la graisse au bisulfure de
molybdène sur les collerettes et les
lèvres de bague d’étanchéité.
BRAS OSCILLANT