2009 YAMAHA GRIZZLY 125 check engine

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NOTICE

ECB00330

Do not use oils with a diesel specification of
“CD” or oils of a higher quality than speci-
fied. In addition, do not use oils labeled “EN-
ERGY CONSERVING II” or higher.

Make sure that no foreign material enters the
crankcase.
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.
EBU27023
Transmission 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 Recommended oil:
See page 10-1.
Oil quantity:
1.25 L (1.32 US qt, 1.10 Imp.qt)
1. “CD” specification
2. “ENERGY CONSERVING II”
1
2

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periodic maintenance and lubrication chart.
To check the transmission oil level
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. Wait a few minutes until the oil settles, and
then remove the screw located at the right
side of the crankcase.
4. Check the transmission oil level.
TIP
The transmission oil should be at the brim of the
hole.
5. If the transmission oil level is below the brim of
the hole, remove the oil filler bolt, add suffi-
cient oil of the recommended type to raise it to
the correct level, and then install and tighten
the screw and the oil filler bolt.
1. Screw
2. Transmission oil level check window
3. Correct oil level
1 32

1. Transmission oil filler bolt
1

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minutes while checking the transmission for
oil leakage. If oil is leaking, immediately turn
off the engine and check for the cause.
8. Turn the engine off, and then check the oil lev-
el and correct it if necessary.
EBU23841
Cleaning the engine and V-belt case air
filter elements
Both air filter elements should be cleaned at the
specified intervals in the periodic maintenance
chart.
Engine air filter element
TIP

There is a check hose at the bottom of the air filter
case. If dust or water collects in this hose, empty
the hose and clean the air filter element and air fil-
ter case.1. Remove the seat. (See page 4-9.)
2. Remove the breather hose, and then loosen
the clamp screw.
1. Check hose
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6. Wash the sponge material gently but thor-
oughly in solvent.
WARNING

EWB01940
Always use parts cleaning solvent to clean the
sponge material. Never use low-flash-point
solvents or gasoline to clean the sponge mate-
rial because the engine could catch fire or ex-
plode.
7. Squeeze the excess solvent out of the spongematerial and let it dry.
NOTICE
ECB00440
Do not twist the sponge material when squeez-
ing it.
8. Check the sponge material and replace it if
damaged.
9. Apply a quality foam air filter oil to the sponge
material.
TIP

The sponge material should be wet but not drip-
ping.
10. Pull the sponge material over the air filter ele-
1. Bolt
2. Washer
3. Sponge material
4. Air filter element frame
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ment frame.
11. Install the washer and bolt.
NOTICE

ECB00450
Be sure to install the washer with the bent edge
facing upward as shown.
12. Install the air filter element into the air filter
case.
13. Install the air filter case cover by installing the
screws.
14. Install the breather hose and then tighten the
clamp screw.15. Install the seat.TIP
The air filter element should be cleaned every 20–
40 hours. It should be cleaned and lubricated more
often if the ATV is operated in extremely dusty ar-
eas. Each time the air filter element maintenance
is performed, check the air inlet of the air filter case
for obstructions. Check the air filter case rubber
joint to the carburetor fittings and the rubber joint
manifold fittings for an air-tight seal. Tighten all fit-
tings securely to avoid the possibility of unfiltered
air entering the engine.NOTICE

ECB00460

Make sure that the air filter element is prop-
erly seated in the air filter case.

Never operate the engine with the air filter el-
ement removed. This will allow unfiltered air
to enter the engine, causing rapid engine
wear and possible engine damage. Addition-
ally, operation without the air filter element
will affect carburetor jetting with subsequent
poor performance and possible engine over-
heating.
1. Washer
1

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ter the V-belt case, remove this plug to drain the
water from the case.
TIP

If water drains from the V-belt case after removing
the plug, have a Yamaha dealer check the ATV as
the water may affect other engine parts.
EBU23940
Adjusting the carburetor
The carburetor should be checked and, if neces-
sary, adjusted at the intervals specified in the peri-
odic maintenance and lubrication chart. The
carburetor is an important part of the engine andrequires very sophisticated adjustment. Therefore,
most carburetor adjustments should be left to a
Yamaha dealer, who has the necessary profes-
sional knowledge and experience. The adjustment
described in the following section, however, may
be performed by the owner as part of routine main-
tenance.NOTICE
ECB00480
The carburetor has been set and extensively
tested at the Yamaha factory. Changing these
settings without sufficient technical knowl-
edge may result in poor performance of or
damage to the engine.
EBU24000
Adjusting the engine idling speed
The engine idling speed must be checked and, if
necessary, adjusted as follows at the intervals
specified in the periodic maintenance and lubrica-
tion chart.
TIP

A diagnostic tachometer is needed to make this
adjustment.
1. Start the engine and warm it up.
1. V-belt case drain plug
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TIP

The engine is warm when it quickly responds to the
throttle.
2. Attach the tachometer to the spark plug lead.
3. Check the engine idling speed and, if neces-
sary, adjust it to specification by turning the
throttle stop screw at the carburetor. To in-
crease the engine idling speed, turn the throt-
tle stop screw in direction (a), and to decrease
it, turn the screw in direction (b).TIP
If the specified idling speed cannot be obtained as
described above, have a Yamaha dealer make the
adjustment.
EBU24044
Adjusting the throttle cable free play
The throttle cable free play should be checked
and, if necessary, adjusted at the intervals speci-
fied in the periodic maintenance and lubrication
chart.
The throttle cable free play should measure 1.0–
3.0 mm (0.04–0.12 in) at the throttle lever. Period-
ically check the throttle cable free play and, if nec-
essary, adjust it as follows.TIP

The engine idling speed must be checked, and ad-
justed if necessary, before adjusting the throttle ca-
ble free play.
1. Loosen the locknut.
2. To increase the throttle cable free play, turn
the throttle cable free play adjusting bolt in di-
rection (a). To decrease the throttle cable free
play, turn the adjusting bolt in direction (b).
1. Throttle stop screw
Engine idling speed:
1650–1750 r/min
(a)(b) 1

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3. Tighten the locknut.
EBU24060
Valve clearance
The valve clearance changes with use, resulting in
improper air-fuel mixture and/or engine noise. To
prevent this from occurring, the valve clearance
must be adjusted by a Yamaha dealer at the inter-
vals specified in the periodic maintenance and lu-
brication chart.
EBU24090
Checking the front and rear brake
shoes
The front and rear brake shoes must be checked
for wear at the intervals specified in the periodic
maintenance and lubrication chart. Each brake is
provided with a wear indicator, which allows you to
check the brake shoe wear without having to dis-
assemble the brake. To check the brake shoe
wear, check the position of the wear indicator while
applying the brake. If a brake shoe has worn to the
point that the wear indicator reaches the wear limit
line or mark, have a Yamaha dealer replace the
brake shoes as a set.
1. Locknut
2. Throttle cable free play adjusting bolt
3. Throttle cable free play
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(a) (b)