2003 YAMAHA WR 250F light

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Page 16 of 860

YAMAHA WR 250F 2003  Manuale de Empleo (in Spanish) ILLUSTRATED SYMBOLS 
(Refer to the illustration)
Illustrated symbols 1 to 7 are
designed as thumb tabs to indicate
the chapter’s number and content.
1General information
2Specifications
3Regular ins

Page 24 of 860

YAMAHA WR 250F 2003  Manuale de Empleo (in Spanish) CHAPTER 6
ELECTRICAL
ELECTRICAL COMPONENTS 
AND WIRING DIAGRAM............. 6-1
MAP-CONTROLLED CDI UNIT.. 6-3
IGNITION SYSTEM..................... 6-8
ELECTRIC STARTING 
SYSTEM........................

Page 26 of 860

YAMAHA WR 250F 2003  Manuale de Empleo (in Spanish) 1 - 1
GEN
INFODESCRIPTION
EC100000
GENERAL INFORMATION
EC110000
DESCRIPTION
1Clutch lever
2Hot starter lever
3Engine stop switch
4Trip meter
5Main switch
6Light switch
7Start switch
8Front brake lever

Page 32 of 860

YAMAHA WR 250F 2003  Manuale de Empleo (in Spanish) 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 37 of 860

YAMAHA WR 250F 2003  Manuale de Empleo (in Spanish) 1 - 12
GEN
INFO
SPECIAL TOOLS
YU-3112-C, 90890-03112 Pocket tester
Use this tool to inspect the coil resistance, output 
voltage and amperage.
YU-8036-B
90890-03113Inductive tachometer
Engine tachomet

Page 52 of 860

YAMAHA WR 250F 2003  Manuale de Empleo (in Spanish) 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 860

YAMAHA WR 250F 2003  Manuale de Empleo (in Spanish) 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 58 of 860

YAMAHA WR 250F 2003  Manuale de Empleo (in Spanish) 1 - 33
GEN
INFO
LIGHT SWITCH
The light switch 
1 is located on the
handlebar.
EC15F000VALVE JOINT 
This valve joint 
1 prevents fuel from
flowing out and is installed to the fuel
tank breather hose.
C
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