2014 YAMAHA YZ450F check engine

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Page 7 of 360

YAMAHA YZ450F 2014  Owners Manual EAS1SL1005
SAFETY INFORMATION
THIS MACHINE IS DESIGNED STRICTLY FOR COMPETITION USE, ONLY ON A CLOSED 
COURSE. It is illegal for this machine to be operated on any public street, road, or highway. Off

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YAMAHA YZ450F 2014  Owners Manual 1
2
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8
9
10
TABLE OF CONTENTS
GENERAL INFORMATION
SPECIFICATIONS
PERIODIC CHECKS AND ADJUST-
MENTS
CHASSIS
ENGINE
COOLING SYSTEM
FUEL SYSTEM
ELECTRICAL SYSTEM
TROUBLE SHOOTING
TUNING

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YAMAHA YZ450F 2014  Owners Manual STARTING AND BREAK-IN.......................................................................... 1-22
FUEL ..............................................................................................

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YAMAHA YZ450F 2014  Owners Manual DESCRIPTION
1-4
EAS1SL1009
DESCRIPTION
TIP
Designs and specifications of the vehicle are subject to change without notice. Therefore, please 
note that the descriptions in this manual may be different

Page 24 of 360

YAMAHA YZ450F 2014  Owners Manual IMPORTANT INFORMATION
1-10
EAS20180
IMPORTANT INFORMATION
EAS1SL1023PREPARATION FOR REMOVAL AND DIS-
ASSEMBLY
1. Before the jobs, completely remove mud, 
dust, and the like in order to prevent the en

Page 33 of 360

YAMAHA YZ450F 2014  Owners Manual SPECIAL TOOLS
1-19
Crankcase separating tool
90890-04152
YU-A9642
This tool is used to remove 
the crankshaft.
Ignition checker
90890-06754
Oppama pet-4000 spark 
checker
YM-34487
This tool is used to

Page 37 of 360

YAMAHA YZ450F 2014  Owners Manual STARTING AND BREAK-IN
1-23
7. To stop the engine, push the engine stop 
switch “1.”
TIP
Continue pushing the engine stop switch till the 
engine comes to a full stop.
EAS1SL1044STARTING A WARM ENG

Page 38 of 360

YAMAHA YZ450F 2014  Owners Manual MAINTENANCE AFTER BREAK-IN
1-24
MAINTENANCE AFTER BREAK-IN
After a break-in, perform careful maintenance 
to get ready for the next practice or race.
Refer to “PRE-OPERATION INSPECTION 
AND MAINTENA
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