Yamaha Wr250r 2008 Manual

 
WATER PUMP 
6-6 
EAS26500 
WATER PUMP 
Removing the water pump
Order Job/Parts to remove Q’ty Remarks  
Drains the coolant.Refer to“CHANGING THE COOLANT” on 
page 3-18.
Drains the engine oilRefer to“CHANGING THE ENGINE OIL” on 
page 3-11.
Water pump housing cover Refer to“CLUTCH” on page 5-34.
Crank case cover light Refer to“CLUTCH” on page 5-34.
1 Circlips 1
2 Impeller shaft gear 1
3 Dowelpin 1
4 Plate 1
5 Impeller shaft 1
6 Mechanical seal 1
7 Bearing 1
For installation, reverse the removal proce-...

 
WATER PUMP 
6-7 
EAS26530 
CHECKING THE WATER PUMP 
1. Check: 
 
Water pump housing cover 
 
Impeller shaft 
 
Plate
Cracks/damage/wear  
→ 
 Replace.
2. Check: 
 
Impeller shaft gear
Cracks/damage/chips  
→ 
 Replace. 
EAS26560 
ASSEMBLING THE WATER PUMP 
1. Install: 
 
Bearing 
 
Mechanical “1”
(to the right crankcase cover)
NOTE:
 
 
Install the mechanical seal by facing stamp
world “WATER SIDE” to the impeller housing
cover. 
 
Install the mechanical seal by using mechani-
cal seal...

 
WATER PUMP 
6-8 
 
Crankcase
Refer to “CHANGING THE ENGINE OIL” on
page 3-11.
9. Fill: 
 
Cooling system
Refer to “CHANGING THE COOLANT” on
page 3-18. 

 
WATER PUMP 
6-9 

 
1
2
3
4
5
6
7
8
9
 
FUEL SYSTEM 
FUEL TANK ...................................................................................................7-1  
REMOVING THE FUEL TANK .................................................................7-2
REMOVING THE FUEL PUMP ................................................................7-2
INSTALLING THE FUEL PUMP...............................................................7-2
INSTALLING THE FUEL TANK...

 
FUEL TANK 
7-1 
EAS26620 
FUEL TANK 
Removing the fuel tank
Order Job/Parts to remove Q’ty Remarks 
Seat Refer to“GENERAL CHASSIS” on page 4-1.
Side cover (left/right)
Air scoop (left/right)
1 Fuel tank 1
2 Fuel hose coupler 1 Disconnect.
3 Hose (fuel tank-roll over valve) 1 Disconnect (for California)
4 Fuel tank bracket (front/rear) 1/1
5 Fuel pump bracket 1
6 Fuel pump assembly 1
7 O-ring 1
For installation, reverse the removal proce-
dure.
1
2 44
5 67
T R..10 Nm (1.0 m • kg, 7.2 ft • Ib) 
T R..4 Nm...

 
FUEL TANK 
7-2 
EAS26630 
REMOVING THE FUEL TANK 
1. Extract the fuel in the fuel tank through the
fuel tank cap with a pump.
2. Remove: 
 
Fuel hose coupler
CAUTION:
 
 ECA14700 
Although the fuel has been removed from
the fuel tank be careful when removing the
fuel hoses, since there may be fuel remain- 
ing in it.
NOTE:
 
 
Slide the fuel hose connector cover “1” in the
direction of the arrow mark, and press the but-
tons “2” on both sides of the connector to re-
move the fuel hose. 
...

 
FUEL TANK 
7-3
1 

 
THROTTLE BODIES 
7-4 
EAS26970 
THROTTLE BODIES 
Removing the throttle bodies
Order Job/Parts to remove Q’ty Remarks  
SeatRefer to “GENERAL CHASSIS” on page 
4-1.
Side cover (left/right)
Air scoop (left/right)
Fuel tank Refer to “FUEL TANK” on page 7-1.
Throttle cable Refer to “CAMSHAFT” on page 5-6.
Clutch cable
CoolantDrain.
Refer to “CHANGING THE COOLANT” on 
page 3-18.
Ignition coil lead Refer to “CAMSHAFT” on page 5-6.
1 Injector coupler 1 Disconnect.
2 Vacuum hose 1
3 ITS boost hose 1
4 FID hose...

 
THROTTLE BODIES 
7-5 
Disassembling the throttle body
Order Job/Parts to remove Q’ty Remarks  
1 Delivery pipe 1
2 Injector 1
3 Gasket 1
4 Throttle position sensor 1
For installation, reverse the removal proce-
dure.
123
4
T R..5 Nm (0.5 m • kg, 3.6 ft • Ib) 
T R..3.5 Nm (0.4 m • kg, 2.5 ft • Ib)