Yamaha 2008 WR250R User Manual

PERIODIC MAINTENANCE AND MINOR REPAIR
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Engine overheating
WARNING
EWA10400
●
Do not remove the radiator cap when the engine and radiator are hot. Scalding hot fluid and steam may be
blown out under pressure, which could cause serious injury. Be sure to wait until the engine has cooled.
●
After removing the radiator cap retaining bolt, place a thick rag, like a towel, over the radiator cap, and then
slowly rotate the cap counterclockwise to the detent to allow any residual pressure to escape. When the hissing
sound has stopped, press down on the cap while turning it counterclockwise, and then remove the cap.
NOTE:
If coolant is not available, tap water can be temporarily used instead, provided that it is changed to the recommended coolant
as soon as possible.
Wait until the
engine has cooled.
Check the coolant level in the
reservoir and radiator.
The coolant level
is OK.
The coolant level is low.
Check the cooling system
for leakage.
Have a Yamaha dealer check
and repair the cooling system.
Add coolant. (See NOTE.)
Start the engine. If the engine overheats again, have a
Yamaha dealer check
and repair the cooling system.
There is
leakage.
There is
no leakage.

Yamaha 2008 WR250R Specifications

General

Displacement	250cc
Bore x Stroke	77.0mm x 53.6mm
Compression Ratio	11.8:1
Fuel System	Fuel injection
Final Drive	Chain
Front Tire	80/100-21
Rear Tire	120/80-18
Fuel Capacity	2.0 gal
Seat Height	36.6 in
Wet Weight	295 lb
Engine Type	Liquid-cooled, DOHC, 4-valve single
Ignition	TCI (Transistor Controlled Ignition)
Transmission	6-speed
Front Suspension	Inverted fork, fully adjustable; 10.6-in travel
Rear Suspension	Single shock, fully adjustable; 10.6-in travel
Front Brake	Hydraulic disc, 250mm
Rear Brake	Hydraulic disc, 230mm
Wheelbase	55.9 in
Ground Clearance	11.8 in