Yamaha Wr250r 2008 Manual

 
STEERING HEAD 
4-51 
EAS23110 
REMOVING THE LOWER BRACKET 
1. Stand the vehicle on a level surface.
WARNING
 
EWA13120  
Securely support the vehicle so that there is 
no danger of it falling over. 
2. Remove: 
 
Upper ring nut 
 
Lower ring nut “1”
NOTE:
 
Hold the lower ring nut with the exhaust and
steering nut wrench, and then remove the upper 
ring nut with the ring nut wrench.
WARNING
 
EWA13730  
Securely support the lower bracket so that 
there is no danger of it falling. 
EAS23120 
CHECKING...

 
STEERING HEAD 
4-52 
Refer to “CHECKING AND ADJUSTING
THE STEERING HEAD” on page 1-27.
3. Install: 
 
Upper bracket 
 
Steering stem nut
NOTE:
 
Temporarily tighten the steering stem nut.
4. Install: 
 
Front fork legs
Refer to “FRONT FORK” on page 4-39.
NOTE:
 
Temporarily tighten the upper and lower bracket 
pinch bolts.
5. Tighten: 
 
Steering stem nut 
Steering stem nut
120 Nm (12.0 m•kg, 87 ft•lb)
3
2
1 4
TR.. 

 
REAR SHOCK ABSORBER ASSEMBLY 
4-53 
EAS23160 
REAR SHOCK ABSORBER ASSEMBLY 
Removing the rear shock absorber assembly
Order Job/Parts to remove Q’ty Remarks  
Left slide cover/Right slide cover Refer to“GENERAL CHASSIS” on page 4-1.
Drive chain tensioner top Refer to“CHAIN DRIVE” on page 4-59.
1 Rear shock absorber assembly 1
2 Connection rod 1
3 Relay arm 1
4 Collar (short) 1
5 Collar (long) 1
6 Oil seal 4
7 Bearing 2
8 Collar 1
9 Oil seal 2
10 Bearing 2
11 Collar 1
12 Bearing 1
13 Oil seal 2
For...

 
REAR SHOCK ABSORBER ASSEMBLY 
4-54 
EAS23180 
HANDLING THE REAR SHOCK ABSORBER
WARNING
 
EWA13740  
This rear shock absorber contains highly
compressed nitrogen gas. Before handling
the rear shock absorber, read and make sure
you understand the following information.
The manufacturer cannot be held responsi-
ble for property damage or personal injury
that may result from improper handling of
the rear shock absorber. 
 
Do not tamper or attempt to open the rear
shock absorber. 
 
Do not subject the...

 
REAR SHOCK ABSORBER ASSEMBLY 
4-55 
Damage/wear  
→ 
 Replace.
2. Check: 
 
Bearings 
 
Oil seals
Damage/pitting  
→ 
 Replace.
3. Check: 
 
Collar
Damage/scratches  
→ 
 Replace. 
EAS23270 
INSTALLING THE RELAY ARM 
1. Lubricate: 
 
Oil seal 
 
Bearings 
 
Collar
2. Install: 
 
Bearing “1”
(To connecting rod “2”) 
 
Bearing “3”
(To relay arm “4”) 
 
Bearing “5”
(To rear cushion lower position “6”) 
 
Oil seal “7”
(To the connecting rod, relay arm, and rear
cushion lower position) 
EAS23310...

 
SWINGARM 
4-56 
EAS23330 
SWINGARM 
Removing the swingarm
Order Job/Parts to remove Q’ty Remarks  
Rear wheel Refer to“REAR WHEEL” on page 4-7.
1 Bolt (Swingarm and relay arm) 1
2 Brake hose holder 3
3 Chain case 1
4 Chain cover 1
5 Chain support 1
6 Pivot shaft nut 1
7 Pivot shaft 1
8 Swingarm 1
9 Dust cover 2
10 Front drive chain guide 1
11 Collar 2
12 Oil seal 2
13 Bearing 4
For installation, reverse the removal proce-
dure.
2
2
3
45 6
7
8
99
101111
1212
1313
1313
1
T R..7 Nm (0.7 m • kg, 5.1 ft •...

 
SWINGARM 
4-57 
EAS23350 
REMOVING THE SWINGARM 
1. Stand the vehicle on a level surface.
WARNING
 
EWA13120  
Securely support the vehicle so that there is 
no danger of it falling over.
NOTE:
 
Place the vehicle on a suitable stand so that the 
rear wheel is elevated.
2. Measure: 
 
Swingarm side play 
 
Swingarm vertical movement

 
a. Measure the tightening torque of the pivot
shaft nut.
b. Measure the swingarm side play “a” by mov-
ing the swingarm from side to...

 
SWINGARM 
4-58 
3. Install: 
 
Rear shock absorber assembly
Refer to “REAR SHOCK ABSORBER AS-
SEMBLY” on page 4-53.
4. Install: 
 
Swing arm assembly
5. Install: 
 
Rear wheel
Refer to “REAR WHEEL” on page 4-7.
6. Adjust: 
 
Drive chain slack
Refer to “ADJUSTING THE DRIVE CHAIN
SLACK” on page 1-26. 
Installed depth “a”
15 mm (0.59 in)
Installed depth “b”
8.5 
– 
9.0 mm (0.33 
– 
0.35 in)
Installed depth “c”
0 
– 
0.5 mm (0 
– 
0.02 in)
Pivot shaft nut
85 Nm (8.5 m•kg, 62 ft•lb)
Drive chain slack...

 
CHAIN DRIVE 
4-59 
EAS23400 
CHAIN DRIVE 
Removing the drive chain
Order Job/Parts to remove Q’ty Remarks  
Swingarm Refer to“SWINGARM” on page 4-56.
1 Drive sprocket cover 1
2 Drive sprocket nut 1
3 Drive sprocket 1
4 Drive chain 1
5 Drive chain tensioner top 1
6 Drive chain tensioner bottom 1
For installation, reverse the removal proce-
dure.
1
2
3 45
6
T R..23 Nm (2.3 m • kg, 17 ft • Ib) 
T R..23 Nm (2.3 m • kg, 17 ft • Ib) 
T R..10 Nm (1.0 m • kg, 7.2 ft • Ib) 
T R..95 Nm (9.5 m • kg, 69 ft • Ib)  

 
CHAIN DRIVE 
4-60 
EAS23420 
REMOVING THE DRIVE CHAIN 
1. Stand the vehicle on a level surface.
WARNING
 
EWA13120  
Securely support the vehicle so that there is 
no danger of it falling over.
NOTE:
 
Place the vehicle on a suitable stand so that the 
rear wheel is elevated.
2. Remove: 
 
Drive sprocket nut “1”
NOTE:
 
 
Return the bent tab of the locknut. 
 
Operate the rear brake, and loosen the drive
sprocket. 
 
After loosening the drive sprocket, remove the 
rear wheel and swingarm.
3....