2005 YAMAHA WR 250F light

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Page 16 of 864

YAMAHA WR 250F 2005  Owners Manual 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 864

YAMAHA WR 250F 2005  Owners Manual CHAPTER 6
ELECTRICAL
ELECTRICAL COMPONENTS 
AND WIRING DIAGRAM............  6-1
MAP-CONTROLLED 
CDI UNIT....................................  6-3
IGNITION SYSTEM....................  6-8
ELECTRIC STAR

Page 26 of 864

YAMAHA WR 250F 2005  Owners Manual 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 32 of 864

YAMAHA WR 250F 2005  Owners Manual 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 864

YAMAHA WR 250F 2005  Owners Manual 1 - 12
GEN
INFO
SPECIAL TOOLS
YS-1880-A, 90890-01701 Sheave holder
This tool is used for when loosening or tightening the 
flywheel magneto securing nut.
YU-3112-C, 90890-03112 Pocket tester
Use this

Page 52 of 864

YAMAHA WR 250F 2005  Owners Manual 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 2005  Owners Manual 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 78 of 864

YAMAHA WR 250F 2005  Owners Manual 1 - 53
GEN
INFO
EC1B2001STORAGE
If your machine is to be stored for 60
days or more, some preventive mea-
sures must be taken to avoid deterio-
ration. After cleaning the machine
thoroughly, prepare i
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