2009 YAMAHA WR 450F Owners Manual

Page 9 of 226

YAMAHA WR 450F 2009  Owners Manual TABLE OF CONTENTS
GENERAL INFORMATION1
SPECIFICATIONS2
REGULAR INSPECTION AND 
ADJUSTMENTS
3
TUNING4
ENGINE5
CHASSIS6
ELECTRICAL7

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YAMAHA WR 450F 2009  Owners Manual CONTENTS
CHAPTER 1
GENERAL INFOR-
MATION
DESCRIPTION ................. 1-1
MACHINE 
IDENTIFICATION ............. 1-2
INCLUDED PARTS .......... 1-2
IMPORTANT 
INFORMATION................. 1-2
CHECKING

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YAMAHA WR 450F 2009  Owners Manual 1-1
DESCRIPTION
GENERAL INFORMATION
DESCRIPTION
• The machine you have purchased may differ slightly from those shown in the following.
• Designs and specifications are subject to change without n

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YAMAHA WR 450F 2009  Owners Manual 1-2
MACHINE IDENTIFICATION
MACHINE IDENTIFICATION
There are two significant reasons for 
knowing the serial number of your 
machine:
1. When ordering parts, you can 
give the number to your Yamaha 
de

Page 13 of 226

YAMAHA WR 450F 2009  Owners Manual 1-3
CHECKING OF CONNECTION
4. During the machine disassembly, 
clean all parts and place them in 
trays in the order of disassembly. 
This will speed up assembly time 
and help assure that all parts a

Page 14 of 226

YAMAHA WR 450F 2009  Owners Manual 1-4
SPECIAL TOOLS
SPECIAL TOOLS
The proper special tools are necessary for complete and accurate tune-up and assembly. Using the correct special tool will 
help prevent damage caused by the use of imp

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YAMAHA WR 450F 2009  Owners Manual 1-5
SPECIAL TOOLS
Damper rod holder
YM-01494, 90890-01494Use this tool to remove and install 
the damper rod.
Fork seal driver
YM-A0948, 90890-01502 This tool is used when install the fork 
oil seal.

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YAMAHA WR 450F 2009  Owners Manual 1-6
SPECIAL TOOLS
Valve spring compressor
YM-4019, 90890-04019 This tool is needed to remove and 
install the valve assemblies.
Clutch holding tool
YM-91042, 90890-04086 This tool is used to hold the
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