2007 YAMAHA WR 250F engine

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Page 232 of 912

YAMAHA WR 250F 2007  Owners Manual INSP
ADJ
3 - 21
EC350000
ENGINE
SEAT, FUEL TANK AND SIDE COVERS
Extent of removal:
1 Seat removal
2 Fuel tank removal
3 Side covers removal
4 Headlight removal
Extent of removal Order Part name Q’ty

Page 236 of 912

YAMAHA WR 250F 2007  Owners Manual 3 - 25
INSP
ADJ
REMOVAL POINTS
Side cover
1. Remove:
Bolt (side cover)
Right side cover 
1 
NOTE:Draw the side cover backward to
remove it because its claw 
a is
inserted in the air filter case.
POI

Page 238 of 912

YAMAHA WR 250F 2007  Owners Manual INSP
ADJ
3 - 27
EC4S0000EXHAUST PIPE AND SILENCER
Extent of removal:
1 Silencer removal
2 Exhaust pipe removal
Extent of removal Order Part name Q’ty Remarks
EXHAUST PIPE AND SILENCER 
REMOVAL
Prepa

Page 242 of 912

YAMAHA WR 250F 2007  Owners Manual 3 - 31
INSP
ADJ
INSPECTION
Silencer and exhaust pipe
1. Inspect:
Gasket 
1 
Damage 
→ Replace.
1
ASSEMBLY AND INSTALLATION
Silencer and exhaust pipe
1. Install: 
Gasket
Exhaust pipe 
1 
Nut (exh

Page 244 of 912

YAMAHA WR 250F 2007  Owners Manual 3 - 33
INSP
ADJ
COOLANT LEVEL INSPECTION
WARNING
Do not remove the radiator cap 1,
drain bolt and hoses when the
engine and radiator are hot. Scald-
ing hot fluid and steam may be
blown out under pres

Page 246 of 912

YAMAHA WR 250F 2007  Owners Manual 3 - 35
INSP
ADJ
COOLANT REPLACEMENT
WARNING
Do not remove the radiator cap
when the engine is hot.
CAUTION:
Take care so that coolant does not
splash on painted surfaces. If it
splashes, wash it away

Page 248 of 912

YAMAHA WR 250F 2007  Owners Manual 3 - 37
INSP
ADJ
8. Fill:
Radiator
Engine
To specified level.
CAUTION:
Do not mix more than one type
of ethylene glycol antifreeze
containing corrosion inhibitors
for aluminum engine.
Do not use wa

Page 250 of 912

YAMAHA WR 250F 2007  Owners Manual 3 - 39
INSP
ADJ
EC355000RADIATOR CAP INSPECTION
1. Inspect:
Seal (radiator cap) 
1 
Valve and valve seat 
2 
Crack/damage 
→ Replace.
Exist fur deposits 
3 
→ Clean
or replace.
RADIATOR CAP OPEN