Yamaha Wr250r 2008 Manual

 
ENGINE 
3-19 
10.Fill: 
 
Cooling system
(with the specified amount of the recom-
mended coolant)
Handling notes for coolant
Coolant is potentially harmful and should be
handled with special care.
WARNING
 
EWA13040  
 
If coolant splashes in your eyes, thorough-
ly wash them with water and consult a doc-
tor. 
 
If coolant splashes on your clothes, quickly
wash it away with water and then with soap
and water. 
 
If coolant is swallowed, induce vomiting 
and get immediate medical attention....

 
CHASSIS 
3-21
WARNING
 
EWA13050  
A soft or spongy feeling in the brake lever
can indicate the presence of air in the brake
system. Before the vehicle is operated, the
air must be removed by bleeding the brake
system. Air in the brake system will consid- 
erably reduce braking performance.
CAUTION:
 
 ECA13510 
After adjusting the brake pedal position, 
make sure there is no brake drag.

 
3. Adjust: 
 
Rear brake light switch
Refer to “ADJUSTING THE REAR BRAKE
LIGHT...

 
CHASSIS 
3-22 
EAS21260 
CHECKING THE REAR BRAKE PADS 
The following procedure applies to all of the
brake pads.
1. Operate the brake.
2. Check: 
 
Rear brake pad
Wear indicators “1” almost touch the brake
disc  
→ 
 Replace the brake pads as a set.
Refer to “REAR BRAKE” on page 4-23. 
EAS21270 
CHECKING THE FRONT BRAKE HOSE 
1. Check: 
 
Brake hose “1”
Cracks/damage/wear  
→ 
 Replace.
2. Check: 
 
Brake hose clamp
Loose Connection  
→ 
 Tighten the clamp bolt.
3. Hold the vehicle upright and apply...

 
CHASSIS 
3-23

 
EAS21350 
BLEEDING THE HYDRAULIC BRAKE 
SYSTEM
WARNING
 
EWA13100  
Bleed the hydraulic brake system whenever: 
 
the system is disassembled. 
 
a brake hose is loosened, disconnected or
replaced. 
 
the brake fluid level is very low. 
 
brake operation is faulty. 
1. Remove: 
 
Brake master cylinder reservoir cap
NOTE:
 
 
Be careful not to spill any brake fluid or allow
the brake master cylinder reservoir or brake
fluid reservoir to overflow. 
...

 
CHASSIS 
3-24

 
EAS21420 
ADJUSTING THE DRIVE CHAIN SLACK
NOTE:
 
The drive chain slack must be checked at the 
tightest point on the chain.
CAUTION:
 
 ECA13550 
A drive chain that is too tight will overload
the engine and other vital parts, and one that
is too loose can skip and damage the swing-
arm or cause an accident. Therefore, keep
the drive chain slack within the specified lim- 
its. 
1. Stand the vehicle on a level surface.
WARNING
 
EWA13120  
Securely...

 
CHASSIS 
3-25 
vehicle is used in dusty areas.
This vehicle has a drive chain with small rubber
O-rings between each side plate. Steam clean-
ing, high-pressure washing, certain solvents,
and the use of a coarse brush can damage
these O-rings. Therefore, use only kerosene to
clean the drive chain. Wipe the drive chain dry
and thoroughly lubricate it with engine oil or
chain lubricant that is suitable for O-ring chains.
Do not use any other lubricants on the drive
chain since they may contain solvents...

 
CHASSIS 
3-26 
hold the lower ring nut and tighten the upper
ring nut until their slots are aligned.
NOTE:
 
Make sure the special washer tabs “a” sit cor- 
rectly in the ring nut slots “b”.

 
5. Install: 
 
Upper bracket
Refer to “STEERING HEAD” on page 4-49. 
 
Handlebar
Refer to “HANDLEBAR” on page 4-34. 
EAS21530 
CHECKING THE FRONT FORK 
1. Stand the vehicle on a level surface.
WARNING
 
EWA13120  
Securely support the vehicle so that there is 
no danger of it...

 
CHASSIS 
3-27

 
Compression damping
CAUTION:
 
 ECA13590 
Never go beyond the maximum or minimum 
adjustment positions. 
1. Adjust: 
 
Compression damping

 
a. Turn the adjusting screw “1” in direction “a” or
“b”.

 
EAS32D1020 
AIR BLEEDING FROM FRONT FORK 
When the temperature increases in the front forkduring touring, the air pressure increases in the
fork and the suspension will become less flexi-...

 
CHASSIS 
3-28 
cle before this adjustment.
Refer to “REAR SHOCK ABSORBER ASSEM- 
BLY” on page 4-53.

 
a. Adjust the spring preload with a ring nut
wrench.
b. Loosen the locknut “1”.
c. Turn the adjusting nut “2” in direction “a” or
“b”.
d. Tighten the locknut.

 
Rebound damping
CAUTION:
 
 ECA13590 
Never go beyond the maximum or minimum 
adjustment positions.  
1. Adjust: 
 
Rebound damping

 
a. Turn...