2005 YAMAHA YFZ450 engine

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Page 94 of 452

YAMAHA YFZ450 2005  Manuale de Empleo (in Spanish) 4-23
EBU00930
Fuel cock
The fuel cock supplies fuel from the fuel tank to the
carburetor. 
The fuel cock has three positions.
OFF: With the lever in this position, fuel will not
flow. Always turn the

Page 96 of 452

YAMAHA YFZ450 2005  Manuale de Empleo (in Spanish) 4-25 1. Starter (choke) “”
1. Starter (enrichisseur) “”
1. Starter (choke) “”
EBU00950
Starter (choke) “”
Starting a cold engine requires a richer air-fuel
mixture. A separate starter

Page 124 of 452

YAMAHA YFZ450 2005  Manuale de Empleo (in Spanish) 5-1
EBU01130
1-PRE-OPERATION CHECKS
Before using this machine, check the following points:
ITEM ROUTINE PAGE
Front brakeCheck operation, lever free play, fluid level and fluid leakage.
Fill with DOT

Page 132 of 452

YAMAHA YFZ450 2005  Manuale de Empleo (in Spanish) 5-9
EBU14571
Fuel
Make sure there is sufficient gasoline in the tank.NOTE:_ If knocking or pinging occurs, use a different brand
of gasoline or higher octane grade. _CAUTION:_ Use only unleaded gasoli

Page 134 of 452

YAMAHA YFZ450 2005  Manuale de Empleo (in Spanish) 5-11 1. Fuel tank filler tube
2. Fuel level
1. Tube de remplissage du réservoir de carburant
2. Niveau de carburant
1. Tubo de llenado del depósito de combustible
2. Nivel de combustible
WARNING
_ 

Page 136 of 452

YAMAHA YFZ450 2005  Manuale de Empleo (in Spanish) 5-13
EBU10842
Engine oil
Make sure the engine oil is at the specified level.
Add oil as necessary. (See page 8-23.)CAUTION:_ 
In order to prevent clutch slippage (since
the engine oil also lubricates

Page 138 of 452

YAMAHA YFZ450 2005  Manuale de Empleo (in Spanish) 5-15
EBU13160
Coolant
Check the coolant level in the coolant reservoir
when the engine is cold. (The coolant level will
vary with engine temperature.) The coolant level is
satisfactory if it is betwee

Page 140 of 452

YAMAHA YFZ450 2005  Manuale de Empleo (in Spanish) 5-17
WARNING
_ Wait for the engine and radiator to cool before
removing the radiator cap. You could be
burned by hot fluid and steam blown out under
pressure. Always put a thick rag over the cap
when
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