2012 YAMAHA GRIZZLY 450 maintenance

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EBU21743Periodic maintenance chart for the emission control system TIP
For ATVs not equipped with an odometer or an hour meter, follow the month maintenance intervals.
For ATVs equipped with an odometer or an hour meter, follow the km (mi) or hours maintenance inter-
vals. However, keep in mind that if the ATV isn’t used for a long period of time, the month maintenance
intervals should be followed.
Items marked with an asterisk should be performed by a Yamaha dealer as they require special tools,
data and technical skills.NO. ITEM CHECK OR MAINTENANCE
JOB INITIAL
EVERY
Whichev- er comes first month136612
km
(mi) 320
(200) 1300
(800) 2500
(1600) 2500
(1600) 5000
(3200)
hours 20 80 160 160 320
1 *Fuel line 
Check fuel hoses for cracks or other damage, and
replace if necessary. √√√
2 Spark plug 
Check condition and clean, regap, or replace if
necessary. √√√√√
3 *Valves Check valve clearance and adjust if necessary. √ √√√
4 *Carburetor 
Check starter (choke) operation and correct if nec-
essary.
 Check engine idling speed and adjust if neces-
sary. √√√√
5 *Crankcase breather
system 
Check breather hose for cracks or other damage,
and replace if necessary. √√√
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6*Exhaust system 
Check for leakage and replace gasket(s) if neces-
sary.
 Check for looseness and tighten all screw clamps
and joints if necessary. √√√
7 Spark arrester Clean. √√√
NO. ITEM
CHECK OR MAINTENANCE
JOB INITIAL EVERY
Whichev- er comes first month136612
km
(mi) 320
(200) 1300
(800) 2500
(1600) 2500
(1600) 5000
(3200)
hours 20 80 160 160 320
U1CT61E0.book Page 4 Wednesday, April 20, 2011 6:36 PM

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EBU21865General maintenance and lubrication chart TIP
For ATVs not equipped with an odometer or an hour meter, follow the month maintenance intervals.
For ATVs equipped with an odometer or an hour meter, follow the km (mi) or hours maintenance inter-
vals. However, keep in mind that if the ATV isn’t used for a long period of time, the month maintenance
intervals should be followed.
Items marked with an asterisk should be performed by a Yamaha dealer as they require special tools,
data and technical skills.NO. ITEM CHECK OR MAINTENANCE
JOB INITIAL
EVERY
Whichev- er comes first month136612
km
(mi) 320
(200) 1300
(800) 2500
(1600) 2500
(1600) 5000
(3200)
hours 20 80 160 160 320
1 Air filter element Clean and replace if necessary. Every 20
–40 hours (more often in wet or
dusty areas)
2 *Front brake 
Check operation and correct if necessary.
 Check fluid level and ATV for fluid leakage, and
correct if necessary. √√√√√
 Replace brake pads. Whenever worn to the limit
3 *Rear brake 
Check operation and correct if necessary.
 Check brake lever and pedal free play, and adjust
if necessary. √√√√√
 Check brake friction plate wear and replace if nec-
essary. √ √√√
U1CT61E0.book Page 5 Wednesday, April 20, 2011 6:36 PM

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4*Brake hoses 
Check for cracks or other damage, and replace if
necessary. √√√√
 Replace. Every 4 years
5 *Wheels 
Check runout and for damage, and replace if nec-
essary. √ √√√
6 *Tires 
Check tread depth and for damage, and replace if
necessary.
 Check air pressure and balance, and correct if
necessary. √ √√√
7 *Wheel hub bearings 
Check for looseness or damage, and replace if
necessary. √ √√√
8 *V- b e l t 
Check for wear, cracks or other damage, and re-
place if necessary. √ √√√
9 *Drive shaft univer-
sal joint 
Lubricate with lithium-soap-based grease. √√√
10 *Chassis fasteners 
Make sure that all nuts, bolts, and screws are
properly tightened. √√√√√
11 *Shock absorber as-
semblies 
Check operation and correct if necessary.
 Check for oil leakage and replace if necessary. √√√
12 *Stabilizer bushes 
Check for cracks or other damage, and replace if
necessary. √√√
NO. ITEM
CHECK OR MAINTENANCE
JOB INITIAL EVERY
Whichev- er comes first month136612
km
(mi) 320
(200) 1300
(800) 2500
(1600) 2500
(1600) 5000
(3200)
hours 20 80 160 160 320
U1CT61E0.book Page 6 Wednesday, April 20, 2011 6:36 PM

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8
13*Rear knuckle pivots Lubricate with lithium-soap-based grease. √√√
14 *Steering shaft Lubricate with lithium-soap-based grease. √√√
15 *Steering system 
Check operation and repair or replace if damaged.
 Check toe-in and adjust if necessary. √√√√√
16 *Engine mount 
Check for cracks or other damage, and replace if
necessary. √√√
17 *Axle boots 
Check for cracks or other damage, and replace if
necessary. √√√√√
18 Engine oil 
Change.
 Check ATV for oil leakage, and correct if neces-
sary. √ √√√
19 Engine oil filter car-
tridge 
Replace. √√√
20 *Engine oil strainer Clean. √√√
21 Differential gear oil 
Change.
 Check ATV for oil leakage, and correct if neces-
sary. √√
22 Final gear oil 
Change.
 Check ATV for oil leakage, and correct if neces-
sary. √ √√√
NO. ITEM
CHECK OR MAINTENANCE
JOB INITIAL EVERY
Whichev- er comes first month136612
km
(mi) 320
(200) 1300
(800) 2500
(1600) 2500
(1600) 5000
(3200)
hours 20 80 160 160 320U1CT61E0.book Page 7 Wednesday, April 20, 2011 6:36 PM

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EBU28391TIP
Some maintenance items need more frequent service if you are riding in unusually wet, dusty, sandy or
muddy areas, or at full-throttle.23 Cooling system
Check coolant level and ATV for coolant leakage,
and correct if necessary. √√√√√
 Replace coolant. Every 2 years
24 *Moving parts and
cables 
Lubricate. √√√√
25 *Drive select lever
safety system cable 
Check operation and adjust or replace if neces-
sary. √√√
26 *Throttle lever 
Check operation.
 Check throttle lever free play, and adjust if neces-
sary.
 Lubricate cable and lever housing. √√√√√
27 *Front and rear brake
switches 
Check operation and correct if necessary. √√√√√
28 *Lights and switches 
Check operation and correct if necessary.
 Adjust headlight beams. √√√√√
NO. ITEM
CHECK OR MAINTENANCE
JOB INITIAL EVERY
Whichev- er comes first month136612
km
(mi) 320
(200) 1300
(800) 2500
(1600) 2500
(1600) 5000
(3200)
hours 20 80 160 160 320U1CT61E0.book Page 8 Wednesday, April 20, 2011 6:36 PM

8-10
8
EBU23090Removing and installing panels The panels shown need to be removed to perform
some of the maintenance jobs described in this
chapter. Refer to this section each time a panel
needs to be removed and installed.
EBU30261Panels A and C
To remove a panel1. Remove the seat. (See page 4-18.)
2. Pull outward on the areas shown, and thenpull upward as shown.
1. Panel A
1. Panel B
2. Panel C
3. Panel D
4. Panel E
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To install the panel
Place the panel in the original position and install
the bolts.
Panel E
To remove the panelPull outward on the areas shown.
To install the panelPlace the panel in its original position.
EBU23223Checking the spark plug The spark plug is an important engine component,
which is easy to check. Since heat and deposits
will cause any spark plug to slowly erode, the spark
plug should be removed and checked in accor-
dance with the periodic maintenance and lubrica-
tion chart. In addition, the condition of the spark
plug can reveal the condition of the engine.
To remove the spark plug
1. Remove panel A. (See page 8-10.)
2. Remove the spark plug cap.
1. Panel E
1
U1CT61E0.book Page 14 Wednesday, April 20, 2011 6:36 PM