ECU YAMAHA YZ250F 2009 Owners Manual

YAMAHA YZ250F 2009 Owners Manual YZ250F 2009 YAMAHA YAMAHA https://www.carmanualsonline.info/img/51/53949/w960_53949-0.png YAMAHA YZ250F 2009 Owners Manual

Page 6 of 190

YAMAHA YZ250F 2009  Owners Manual FOREWORD
INTRODUCTION
Congratulations on your purchase of 
a Yamaha YZ series. This model is 
the culmination of Yamahas vast ex-
perience in the production of paceset-
ting racing machines. It repre

Page 16 of 190

YAMAHA YZ250F 2009  Owners Manual 1-6
SPECIAL TOOLS
Timing light
YM-33277-A, 90890-03141 This tool is necessary for checking 
ignition timing.
Valve spring compressor
YM-4019, 90890-04019 This tool is needed to remove and 
install the

Page 22 of 190

YAMAHA YZ250F 2009  Owners Manual 1-12
CLEANING AND STORAGE
CLEANING AND STORAGE
CLEANING
Frequent cleaning of your machine 
will enhance its appearance, maintain 
good overall performance, and ex-
tend the life of many components.
1.

Page 67 of 190

YAMAHA YZ250F 2009  Owners Manual 3-21
CHASSIS
CHECKING AND TIGHTENING THE 
SPOKES
The following procedure applies to all 
of the spokes.
1. Check:
• Spokes
Bend/damage→Replace.
Loose spoke→Retighten.
Tap the spokes with a screw

Page 94 of 190

YAMAHA YZ250F 2009  Owners Manual 4-24
VALVES AND VALVE SPRINGS
2. Measure:
• Compressed spring force "a"
Out of specification→Replace.
b. Installed length
3. Measure:
• Spring tilt "a"
Out of specification→Replace.
CHECKING T

Page 121 of 190

YAMAHA YZ250F 2009  Owners Manual 4-51
ENGINE REMOVAL
HANDLING NOTE
Support the machine securely so 
there is no danger of it falling over.
REMOVING THE DRIVE 
SPROCKET
1. Remove:
• Nut (drive sprocket) "1"
• Lock washer "2"
• S

Page 134 of 190

YAMAHA YZ250F 2009  Owners Manual 5-3
FRONT WHEEL AND REAR WHEEL
HANDLING NOTE
Support the machine securely so 
there is no danger of it falling over.
REMOVING THE REAR WHEEL
1. Remove:
• Wheel "1"
Push the wheel forward and remove

Page 141 of 190

YAMAHA YZ250F 2009  Owners Manual 5-10
FRONT BRAKE AND REAR BRAKE
HANDLING NOTE
Support the machine securely so 
there is no danger of it falling over.
DRAINING THE BRAKE FLUID
1. Remove:
• Brake master cylinder cap "1"
• Protecto

Page 149 of 190

YAMAHA YZ250F 2009  Owners Manual 5-18
FRONT FORK
HANDLING NOTE
Support the machine securely so 
there is no danger of it falling over.
The front fork requires careful atten-
tion. So it is recommended that the 
front fork be maintain

Page 160 of 190

YAMAHA YZ250F 2009  Owners Manual 5-29
STEERING
HANDLING NOTE
Support the machine securely so 
there is no danger of it falling over.
REMOVING THE STEERING RING 
NUT
1. Remove:
• Steering ring nut "1"
Use the steering nut wrench "2"
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