2004 YAMAHA WR 250F check engine

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Page 218 of 864

YAMAHA WR 250F 2004  Owners Manual 3 - 27
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12. Install:
Coolant reservoir cap
13. Start the engine and let it warm
up for several minutes.
14. Turn off the engine and inspect
the coolant level.
Refer to “COOLANT LEVEL
INSPEC

Page 220 of 864

YAMAHA WR 250F 2004  Owners Manual 3 - 29
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3. Inspect:
Pressure
Impossible to maintain the
specified pressure for 10 sec-
onds 
→ Replace.
COOLING SYSTEM INSPECTION
1. Inspect:
Coolant level
2. Attach:
Radiator cap tester

Page 222 of 864

YAMAHA WR 250F 2004  Owners Manual 3 - 31
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2. Adjust:
Clutch lever free play
NOTE:Make minute adjustment on the
lever side using the adjuster 
2.
After adjustment, check proper
operation of clutch lever. Clutch lever free pl

Page 224 of 864

YAMAHA WR 250F 2004  Owners Manual 3 - 33
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THROTTLE LUBRICATION
1. Remove:
Cover (throttle cable cap) 
1 
Cover (grip cap) 
2 
Throttle grip cap 
3 
2. Apply:
Lithium soap base grease
On the throttle cable end 
a.
3. Instal

Page 234 of 864

YAMAHA WR 250F 2004  Owners Manual 3 - 43
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ADJ
4. Remove:
Oil tank cap 
1 
Oil filler cap 
2 
Frame oil drain bolt 
3 
Crankcase oil drain bolt 
4 
Oil filter element drain bolt 
5 
Drain the crankcase and oil
tank (frame) of

Page 236 of 864

YAMAHA WR 250F 2004  Owners Manual 3 - 45
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8. Install:
Copper washer 
1 
Oil strainer (frame) 
2 
Oil hose 
3 
Bolt (oil hose) 
4 
Oil hose clamp 
5 
Lower engine bracket
9. Install:
Copper washer
Oil filter element dra

Page 238 of 864

YAMAHA WR 250F 2004  Owners Manual 3 - 47
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OIL PRESSURE INSPECTION
1. Check:
Oil pressure
Checking steps:
Slightly loosen the oil pressure
check bolt 
1.
Start the engine and keep it
idling until oil starts to seep from
the

Page 240 of 864

YAMAHA WR 250F 2004  Owners Manual 3 - 49
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ADJ
ENGINE IDLING SPEED 
ADJUSTMENT
1. Start the engine and thoroughly
warm it up.
2. Adjust:
Engine idling speed
Adjustment steps:
Adjust the pilot screw.
Refer to “PILOT SCREW
ADJUST
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