2015 YAMAHA GRIZZLY 450 engine

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Page 81 of 170

YAMAHA GRIZZLY 450 2015  Owners Manual 7-12
7
Select a large, flat, unpaved area to become famil-
iar with your ATV. Make sure that this area is free
of obstacles and other riders. You should practice
control of the throttle, brakes, shift

Page 85 of 170

YAMAHA GRIZZLY 450 2015  Owners Manual 7-16
7
around and remount, following the procedure de-
scribed in the Owner’s Manual. 
WARNING! Stall-
ing, rolling backwards or improperly
dismounting while climbing a hill could result in
ATV over

Page 93 of 170

YAMAHA GRIZZLY 450 2015  Owners Manual 8-1
8
EBU28784
PERIODIC MAINTENANCE AND ADJUSTMENT
EBU21675Periodic inspection, adjustment, and lubrication
will keep your vehicle in the safest and most effi-
cient condition possible. Safety is an o

Page 95 of 170

YAMAHA GRIZZLY 450 2015  Owners Manual 8-3
8
EBU21745Periodic maintenance chart for the emission control systemTIPFor ATVs not equipped with an odometer or an hour meter, follow the month maintenance intervals.
 For ATVs equipped wit

Page 99 of 170

YAMAHA GRIZZLY 450 2015  Owners Manual 8-7
8
13*Stabilizer bushes • Check for cracks or other damage, and replace if 
necessary. √√√
14 *Rear knuckle pivots • Lubricate with lithium-soap-based grease. √√√
15 *Steering shaft

Page 106 of 170

YAMAHA GRIZZLY 450 2015  Owners Manual 8-14
8To install the panel
Place the panel in its original position.
EBU23224Checking the spark plugThe spark plug is an important engine component,
which is easy to check. Since heat and deposits
wil

Page 107 of 170

YAMAHA GRIZZLY 450 2015  Owners Manual 8-15
8
3. Remove the spark plug as shown, with the
spark plug wrench included in the owner’s
tool kit.
To check the spark plug 1. Check that the porcelain insulator around the center electrode of th

Page 108 of 170

YAMAHA GRIZZLY 450 2015  Owners Manual 8-16
8To install the spark plug
1. Clean the surface of the spark plug gasket and its mating surface, and then wipe off any
grime from the spark plug threads.
2. Install the spark plug with the spark