2004 YAMAHA WR 250F engine

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Page 26 of 864

YAMAHA WR 250F 2004  Notices Demploi (in French) 1 - 1
GEN
INFODESCRIPTION
EC100000
GENERAL INFORMATION
EC110000
DESCRIPTION
1Clutch lever
2Hot starter lever
3Engine stop switch
4Trip meter
5Main switch
6Start switch
7Front brake lever
8Throttle gri

Page 28 of 864

YAMAHA WR 250F 2004  Notices Demploi (in French) 1 - 3
GEN
INFOMACHINE IDENTIFICATION
EC120001
MACHINE 
IDENTIFICATION
There are two significant reasons for
knowing the serial number of your
machine:
1. When ordering parts, you can
give the number t

Page 32 of 864

YAMAHA WR 250F 2004  Notices Demploi (in French) 1 - 7
GEN
INFOIMPORTANT INFORMATION
EC133000GASKETS, OIL SEALS AND O-
RINGS
1. All gaskets, oil seals, and O-
rings should be replaced when
an engine is overhauled. All gas-
ket surfaces, oil seal lip

Page 52 of 864

YAMAHA WR 250F 2004  Notices Demploi (in French) 1 - 27
GEN
INFO
EC150000
CONTROL FUNCTIONS
MAIN SWITCH
Functions of the respective switch
positions are as follows:
ON:
The engine can be started only at
this position.
OFF:
All electrical circuits ar

Page 54 of 864

YAMAHA WR 250F 2004  Notices Demploi (in French) 1 - 29
GEN
INFO
EC153000SHIFT PEDAL
The gear ratios of the constant-mesh
5 speed transmission are ideally
spaced. The gears can be shifted by
using the shift pedal 
1 on the left
side of the engine.
K

Page 56 of 864

YAMAHA WR 250F 2004  Notices Demploi (in French) 1 - 31
GEN
INFO
FUEL COCK
The fuel cock supplies fuel from the
tank to carburetor and also filters the
fuel. The fuel cock has three posi-
tions:
OFF: With the lever in this position,
fuel will not fl

Page 60 of 864

YAMAHA WR 250F 2004  Notices Demploi (in French) 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 864

YAMAHA WR 250F 2004  Notices Demploi (in French) 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
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