2013 YAMAHA YZ450F ESP

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Page 17 of 228

YAMAHA YZ450F 2013  Owners Manual 1-7
FEATURES
FEATURES
OUTLINE OF THE FI SYSTEM
The main function of a fuel supply system is to provide fuel to the combustion chamber at the optimum air-fuel ratio in ac-
cordance with the engine oper

Page 30 of 228

YAMAHA YZ450F 2013  Owners Manual 1-20
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 85 of 228

YAMAHA YZ450F 2013  Owners Manual 4-4
EXHAUST PIPE AND SILENCER
CHECKING THE SILENCER AND 
EXHAUST PIPE
1. Inspect:
• Gasket "1"
Damage→Replace.
CHANGING THE SILENCER FIBER
1. Remove:
• Rivet (front) "1"
• Inner pipe "2"
•Ta

Page 154 of 228

YAMAHA YZ450F 2013  Owners Manual 5-15
FRONT BRAKE AND REAR BRAKE
Brake fluid may erode painted sur-
faces or plastic parts. Always 
clean up spilled fluid immediately.
A. Front
B. Rear
2. Air bleed:
• Brake system
Refer to "BLEEDIN

Page 177 of 228

YAMAHA YZ450F 2013  Owners Manual 5-38
REAR SHOCK ABSORBER
HANDLING NOTE
• Support the machine securely so 
there is no danger of it falling 
over.
• This rear shock absorber is pro-
vided with a separate type tank 
filled with hi

Page 194 of 228

YAMAHA YZ450F 2013  Owners Manual 7-10
FUEL INJECTION SYSTEM
SETTING THE DIAGNOSTIC MODE
When the FI diagnostic tool is set to 
the diagnostic mode, the sensor out-
put data can be displayed and the op-
eration of the actuators can be

Page 196 of 228

YAMAHA YZ450F 2013  Owners Manual 7-12
FUEL INJECTION SYSTEM
D36 Injectors ActuationCheck that power is supplied to 
the fuel injector.
• Check the fuel injector operation 
by listening for the operating 
sound or by confirming the

Page 223 of 228

YAMAHA YZ450F 2013  Owners Manual 8-2
CHASSIS
A. Air spring characteristics in 
relation to oil amount change
B. Load
C. Stroke
1. Max. oil amount
2. Standard oil amount
3. Min. oil amount
SETTING OF SPRING AFTER 
REPLACEMENT
As the f
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