2003 YAMAHA WR 250F warning

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Page 4 of 860

YAMAHA WR 250F 2003  Manuale duso (in Italian) EC020000
INTRODUCTION
Congratulations on your purchase of
a Yamaha WR series. This model is
the culmination of Yamaha’s vast
experience in the production of pace-
setting racing machines. It repre-

Page 12 of 860

YAMAHA WR 250F 2003  Manuale duso (in Italian) EC080000
HOW TO USE THIS 
MANUAL
EC081000
PARTICULARLY 
IMPORTANT 
INFORMATION
The Safety Alert Symbol means
ATTENTION! BECOME ALERT!
YOUR SAFETY IS INVOLVED!
Failure to follow WARNING instruc-
tions

Page 60 of 860

YAMAHA WR 250F 2003  Manuale duso (in Italian) 1 - 35
GEN
INFO
FUEL
Always use the recommended fuel
as stated below. Also, be sure to use
new gasoline the day of a race.
CAUTION:
Use only unleaded gasoline. The
use of leaded gasoline will cause
se

Page 62 of 860

YAMAHA WR 250F 2003  Manuale duso (in Italian) 1 - 37
GEN
INFO
STARTING AND 
BREAK-IN
WARNING
Never start or run the engine in a
closed area. The exhaust fumes
are poisonous; they can cause
loss of consciousness and death
in a very short time. Alw

Page 64 of 860

YAMAHA WR 250F 2003  Manuale duso (in Italian) 1 - 39
GEN
INFO
1. Inspect the coolant level.
2. Turn the fuel cock to “ON”.
3. Push on the main switch to “ON”.
4. Shift the transmission into neu-
tral.
5. Fully open the cold starter knob
1

Page 212 of 860

YAMAHA WR 250F 2003  Manuale duso (in Italian) 3 - 21
INSP
ADJ
EC350000
ENGINE
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
blow

Page 214 of 860

YAMAHA WR 250F 2003  Manuale duso (in Italian) 3 - 23
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 216 of 860

YAMAHA WR 250F 2003  Manuale duso (in Italian) 3 - 25
INSP
ADJ
9. 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
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