2012 YAMAHA YFZ450 engine

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Page 99 of 152

YAMAHA YFZ450 2012  Owners Manual 8-19
8
12. Install the crankcase engine oil drain bolt, the
engine oil tank drain bolt and their new gasket,
and then tighten the bolts to the specified
torques.
13. Refill with the specified amount o

Page 100 of 152

YAMAHA YFZ450 2012  Owners Manual 8-20
8a higher quality than specified. In addition,
do not use oils labeled 
“ENERGY CONSERV-
ING II”  or higher.
Make sure that no foreign material enters the
crankcase.15. Start the engine, and

Page 101 of 152

YAMAHA YFZ450 2012  Owners Manual 8-21
8
3. If the coolant is at or below the minimum level
mark, remove the coolant reservoir cap, add
coolant or distilled water to the maximum level
mark, and then install the reservoir cap.
NOTICE:

Page 102 of 152

YAMAHA YFZ450 2012  Owners Manual 8-22
8pressure. Always place a thick rag over the cap
when opening. Allow any remaining pressure
to escape before completely removing the cap.
1. Place the ATV on a level surface.
2. Remove panel A. (

Page 103 of 152

YAMAHA YFZ450 2012  Owners Manual 8-23
8
7. After draining the coolant, thoroughly flush the
cooling system with clean tap water.
8. Install the coolant reservoir by installing the bolts.
9. Install the coolant drain bolt and its new

Page 104 of 152

YAMAHA YFZ450 2012  Owners Manual 8-24
813. Remove the radiator cap to check the coolant
level in the radiator. If it is low, add sufficient
coolant until it reaches the top of the radiator,
and then install the radiator cap.
14. Star

Page 106 of 152

YAMAHA YFZ450 2012  Owners Manual 8-26
88. Wash the sponge material gently but thor-
oughly in solvent.  WARNING! Always use
parts cleaning solvent to clean the sponge
material. Never use low-flash-point sol-
vents or gasoline to clea

Page 107 of 152

YAMAHA YFZ450 2012  Owners Manual 8-27
8
14. Install the washer onto the air filter element
frame, and then insert the wing bolt into the
hole in the air filter element frame.  NOTICE:
Be sure to install the washer with its
curved sid