2008 YAMAHA YZ450F Owners Manual

Page 17 of 188

YAMAHA YZ450F 2008  Owners Manual 1-7
SPECIAL TOOLS
Digital tachometer
YU-39951-B, 90890-06760This tool is needed for observing en-
gine rpm.
YAMAHA Bond No. 1215 (ThreeB-
ond
® No. 1215)
90890-85505This sealant (Bond) is used for 
c

Page 18 of 188

YAMAHA YZ450F 2008  Owners Manual 1-8
CONTROL FUNCTIONS
CONTROL FUNCTIONS
ENGINE STOP SWITCH
The engine stop switch "1" is located 
on the left handlebar. Continue push-
ing the engine stop switch till the en-
gine comes to a stop.
CL

Page 19 of 188

YAMAHA YZ450F 2008  Owners Manual 1-9
STARTING AND BREAK-IN
If knocking or pinging occurs, use a 
different brand of gasoline or higher 
octane grade.
• For refueling, be sure to stop the 
engine and use enough care not 
to spill an

Page 20 of 188

YAMAHA YZ450F 2008  Owners Manual 1-10
STARTING AND BREAK-IN
the engine stop switch. Then, re-
start the engine and check its op-
eration within no more than 5 
minutes after it is restarted.
4. Operate the machine in the lower 
gears

Page 21 of 188

YAMAHA YZ450F 2008  Owners Manual 1-11
TORQUE-CHECK POINTS
TORQUE-CHECK POINTS
Concerning the tightening torque, refer to "TIGHTENING TORQUES" section in the CHAPTER 2.
Frame construction Frame to rear frame
Combined seat and fuel tan

Page 22 of 188

YAMAHA YZ450F 2008  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 23 of 188

YAMAHA YZ450F 2008  Owners Manual 2-1
GENERAL SPECIFICATIONS
SPECIFICATIONS
GENERAL SPECIFICATIONS
Model name: YZ450FX (USA, CDN, AUS, NZ)
YZ450F (EUROPE, ZA)
Model code number: 2S2B (USA,CDN)
2S2C (EUROPE)
2S2E (AUS, NZ, ZA)
Dimensio

Page 24 of 188

YAMAHA YZ450F 2008  Owners Manual 2-2
GENERAL SPECIFICATIONS
Fuel:
Type Premium unleaded gasoline only with a research octane 
number of 95 or higher.
Tank capacity 7.0 L (1.54 Imp gal, 1.85 US gal)
Carburetor:
Type FCR-MX39
Manufactu
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