2017 YAMAHA YFZ450R Owners Manual

Page 97 of 154

YAMAHA YFZ450R 2017  Owners Manual 8-8
8
EBU29431TIPSome maintenance items need more frequent service if you are riding in unusually wet, dusty, sandy or
muddy areas, or at full-throttle.
 Replace the fuel hose every five years a

Page 98 of 154

YAMAHA YFZ450R 2017  Owners Manual 8-9
8• Replace the brake hoses every four years and if cracked or damaged.
 UBW260E0.book  Page 9  Thursday, May 12, 2016  2:28 PM

Page 99 of 154

YAMAHA YFZ450R 2017  Owners Manual 8-10
8
EBU30131Removing and installing the cowling 
and panelsThe cowling and panels shown need to be re-
moved to perform some of the maintenance jobs
described in this chapter. Refer to this section

Page 100 of 154

YAMAHA YFZ450R 2017  Owners Manual 8-11
84. Remove the quick fasteners, and then slide
the panel backward and pull upward. 5. Install the fuel tank cap by turning it clock-
wise.
To install the panel
1. Remove the fuel tank cap by turn

Page 101 of 154

YAMAHA YFZ450R 2017  Owners Manual 8-12
8
Panels B and C
To remove a panel
1. Remove panel A.
2. Pull the panel off.
To install a panel1. Place the panel in the original position. 2. Install panel A.
Cowling
To remove the cowling
1. Re

Page 102 of 154

YAMAHA YFZ450R 2017  Owners Manual 8-13
8To install the cowling
1. Place the cowling in the original position, and
then tighten the quick fasteners.
2. Install panels C, B and A.EBU29442Checking the spark plugThe spark plug is an impor

Page 103 of 154

YAMAHA YFZ450R 2017  Owners Manual 8-14
8
Before installing the spark plug, the spark plug
gap should be measured with a wire thickness
gauge and, if necessary, adjusted to specification.
Clean the surface of the spark plug gasket and

Page 104 of 154

YAMAHA YFZ450R 2017  Owners Manual 8-15
8
TIPTo achieve the proper engine oil temperature for
an accurate oil level reading, the engine must have
first completely cooled down, and then warmed
up again for several minutes to normal oper