check engine YAMAHA GRIZZLY 125 2013 User Guide

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Modifications and accessories
Never modify this ATV through improper installa-
tion or use of accessories or other modification. All
parts and accessories added to this ATV should be
genuine Yamaha or equivalent components de-
signed for use on this ATV and should be installed
and used according to instructions. If you have
questions, consult an authorized ATV dealer.
WARNING! Operating this ATV with improper modifications may cause changes in handling
which in some situations could lead to an acci-
dent.
[EWB01491]
Exhaust system
WARNING
EWB01501●Dry grass or brush or other combustible ma-
terial accumulated around the engine area
could catch fire. Do not operate, idle, or park
the ATV in dry grass or other dry ground cov-
er. Keep the engine area free of dry grass,
brush, or other combustible material.●Someone touching the exhaust system dur-
ing or after operation could be burned. Do
not touch the hot exhaust system. Do not
park the ATV in a place where others might
be likely to touch it.The muffler and other engine parts become ex-
tremely hot during operation and remain hot after
the engine has stopped. To reduce the risk of fire
during operation or after leaving the ATV, do not let
brush, grass and other materials collect under the
vehicle, near the muffler or exhaust pipe, or next to
other hot parts. Check under the vehicle after op-
erating in areas where combustible materials may
have collected. Do not idle or park the vehicle in
long dry grass or other dry ground cover.
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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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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 Engine and V-belt
case air filter ele-
ment 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 brake lever free play and adjust if neces-
sary. √√√√√
Replace brake shoes. Whenever worn to the limit
3 *Rear brake Check operation and correct if necessary.
Check brake lever free play and adjust if neces-
sary. √√√√√
Replace brake shoes. Whenever worn to the limit
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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 oil Change.
Check ATV for oil leakage, and correct if neces-
sary. √ √√√
17 Engine oil strainer Clean. √√√
18 Transmission oil Change.
Check ATV for oil leakage, and correct if neces-
sary. √√
19 *Moving parts and
cables Lubricate.
√√√√
20 *Throttle lever Check operation.
Check throttle lever free play, and adjust if neces-
sary.
Lubricate cable and lever housing. √√√√√
21 *Front and rear brake
switches
Check operation and correct if necessary.
√√√√√
22 *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 320U1PY61E0.book Page 7 Wednesday, March 14, 2012 5:22 PM

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EBU23213Checking 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 plug1. Remove the spark plug cap. 2. 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 the spark plug is a medi-
um-to-light tan (the ideal color when the ATV
is ridden normally).1. Spark plug cap
1
1. Spark plug wrench
1
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TIPIf the spark plug shows a distinctly different color,
the engine could be operating improperly. Do not
attempt to diagnose such problems yourself. In-
stead, have a Yamaha dealer check the ATV.2. Check the spark plug for electrode erosionand excessive carbon or other deposits, and
replace it if necessary.
3. Measure the spark plug gap with a wire thick- ness gauge and, if necessary, adjust the gap
to specification.
To install the spark plug1. 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 plug wrench, and then tighten it to the specified
torque.
Specified spark plug:
NGK/CR7HSA
1. Spark plug gapSpark plug gap:0.6–0.7 mm (0.024–0.028 in)
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TIPIf a torque wrench is not available when installing
the spark plug, a good estimate of the correct
torque is 1/4–1/2 turn past finger tight. However,
the spark plug should be tightened to the specified
torque as soon as possible.3. Install the spark plug cap.EBU23268Engine oil The engine oil level should be checked before
each ride. In addition, the oil must be changed at
the intervals specified in the periodic maintenance
and lubrication chart.
To check the engine oil level1. Place the ATV on a level surface.
2. Check the engine oil level on a cold engine.
TIPIf the engine was started before checking the oil
level, be sure to warm up the engine sufficiently,
and then wait at least ten minutes until the oil set-
tles for an accurate reading.3. Remove the engine oil filler cap, and then wipe the engine oil dipstick off with a clean
rag.
4. Insert the dipstick into the filler hole (without screwing it in), and then remove it again to
check the oil level.
Tightening torque:
Spark plug:13 Nm (1.3 m·kgf, 9.4 ft·lbf)1. Engine oil filler cap
2. Engine oil dipstick
2
1
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9. Start the engine, and then let it idle for several
minutes while checking it for oil leakage. If oil
is leaking, immediately turn the engine off and
check for the cause.
10. Turn the engine off, wait at least ten minutes, and then check the oil level and correct it if
necessary.
EBU27026Transmission oil The transmission oil level should be checked be-
fore each ride. In addition, the transmission oil
must be changed at the intervals specified in the
periodic maintenance and lubrication chart.
To check the transmission oil level1. Place the ATV on a level surface.
2. Start the engine, warm it up for several min- utes, and then turn it off.
3. Wait a few minutes until the oil settles, and then loosen the transmission oil check screw
located at the right side of the crankcase until
oil flows out. 4. If no oil flows out, remove the transmission oil
filler bolt and its gasket.
1. Transmission oil check screw
2. Gasket
3. Correct oil level
4. Transmission oil4 3 1
2
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85. Pour the recommended type of oil in the trans-
mission oil filler hole until it flows out of the
check screw hole.
6. Tighten the oil check screw to the specified torque.
7. Check the oil filler bolt gasket for damage, and replace it if necessary. 8. Install the transmission oil filler bolt and its
gasket, and then tighten the bolt to the speci-
fied torque.
To change the transmission oil 1. Place the ATV on a level surface.
2. Start the engine, warm it up for several min- utes, and then turn it off.
3. Place an oil pan under the transmission to col- lect the used oil.
4. Remove the transmission oil filler bolt, the transmission oil drain bolt and their gasket to
drain the oil from the transmission case.
1. Transmission oil filler bolt
2. GasketTightening torque:Transmission oil check screw:16 Nm (1.6 m·kgf, 12 ft·lbf)
1
2
Tightening torque: Transmission oil filler bolt:23 Nm (2.3 m·kgf, 17 ft·lbf)
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5. Install the drain bolt and its new gasket, and
then tighten the bolt to the specified torque.
6. Refill with the specified amount of the recom- mended transmission oil. NOTICE: Make
sure that no foreign material enters the
transmission case.
[ECB00791]
7. Check the oil filler bolt gasket for damage, and replace it if necessary.
8. Install the oil filler bolt and its gasket, and then tighten the bolt to the specified torque.NOTICEECB01061Make sure that no oil gets on the tires or
wheels.9. Start the engine, and then let it idle for severalminutes while checking the transmission for
oil leakage. If oil is leaking, immediately turn
off the engine and check for the cause.
10. Turn the engine off, and then check the oil lev- el and correct it if necessary.
1. Transmission oil drain bolt
2. GasketTightening torque:Transmission oil drain bolt:23 Nm (2.3 m·kgf, 17 ft·lbf)
12
Recommended transmission oil: See page 10-1.
Oil quantity: 0.6 L (0.63 US qt, 0.53 Imp.qt)
Tightening torque: Transmission oil filler bolt:23 Nm (2.3 m·kgf, 17 ft·lbf)
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