2004 YAMAHA WR 250F check engine

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Page 6 of 864

YAMAHA WR 250F 2004  Owners Manual IMPORTANT NOTICE
THIS MACHINE IS DESIGNED
STRICTLY FOR COMPETITION
USE, ONLY ON A CLOSED
COURSE. It is illegal for this machine
to be operated on any public street,
road, or highway. Off-road use on
p

Page 20 of 864

YAMAHA WR 250F 2004  Owners Manual E0A0000
CONTENTS
CHAPTER 1
GENERAL 
INFORMATION
DESCRIPTION...........................  1-1
MACHINE IDENTIFICATION.....  1-3
IMPORTANT INFORMATION....  1-5
CHECKING OF CONNECTION..  1-9
SPECIAL TOOLS.

Page 62 of 864

YAMAHA WR 250F 2004  Owners Manual 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 68 of 864

YAMAHA WR 250F 2004  Owners Manual 1 - 43
GEN
INFO
BREAK-IN PROCEDURES
1. Before starting the engine, fill the
fuel tank with the fuel.
2. Perform the pre-operation
checks on the machine.
3. Start and warm up the engine.
Check the idle

Page 70 of 864

YAMAHA WR 250F 2004  Owners Manual 1 - 45
GEN
INFO
TORQUE-CHECK POINTS
Frame construction Frame to rear frame
Combined seat and fuel tank Fuel tank to frame
Exhaust system Silencer to rear frame
Engine mounting Frame to engine
Engine b

Page 192 of 864

YAMAHA WR 250F 2004  Owners Manual 3 - 1
INSP
ADJ
MAINTENANCE INTERVALS
EC300000
REGULAR INSPECTION AND ADJUSTMENTS
MAINTENANCE INTERVALS
The following schedule is intended as a general guide to maintenance and lubrication. Bear in min

Page 207 of 864

YAMAHA WR 250F 2004  Owners Manual 3 - 16
INSP
ADJ
PRE-OPERATION INSPECTION AND MAINTENANCE
EC320000
PRE-OPERATION INSPECTION AND MAINTENANCE
Before riding for break-in operation, practice or a race, make sure the machine is in good op

Page 212 of 864

YAMAHA WR 250F 2004  Owners Manual 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
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