2010 YAMAHA GRIZZLY 125 fuel

8-49
1
2
3
4
5
6
78
9
10
11

EBU25791
Troubleshooting chart
Check the fuel level in
the fuel tank.1. Fuel
There is enough fuel.
There is no fuel.
Check the compression.
Supply fuel.
The engine does not start.
Check the compression.
Operate the electric starter.2. Compression
There is compression.
There is no compression.
Check the ignition.
Have a Yamaha dealer
check the ATV.
Remove the spark plug
and check the electrodes.3. Ignition
Wipe off with a dry cloth and correct the
spark plug gap, or replace the spark plug.
Have a Yamaha dealer check the ATV.
The engine does not start.
Have a Yamaha dealer
check the ATV.
The engine does not start.
Check the battery.
Operate the electric starter.4. Battery
The engine turns over
quickly.
The engine turns over
slowly.
The battery is good.Check the electrolyte level, recharge the
battery and check the lead connections.
DryWet
Open the throttle halfway and operate
the electric starter.

9-2
1
2
3
4
5
6
7
89
10
11

EBU25933
Storage
Short-term
Always store your ATV in a cool, dry place and, if
necessary, protect it against dust with a porous
cover.
NOTICE:
Storing the ATV in a poorly ven-
tilated room or covering it with a tarp while it is
still wet, will allow water and humidity to seep
in and cause rust. To prevent corrosion, avoid
damp cellars, stables (because of the presence
of ammonia) and areas where strong chemi-
cals are stored.

[ECB00721]

Long-term
Before storing your ATV for several months:
1. Follow all the instructions in the “Cleaning”
section of this chapter.
2. Turn the fuel cock lever to “OFF”.
3. Drain the carburetor float chamber by loosen-
ing the drain bolt; this will prevent fuel deposits
from building up. Pour the drained fuel into the
fuel tank.
4. Fill up the fuel tank and add fuel stabilizer (if
available) to prevent the fuel from deteriorat-
ing.5. Perform the following steps to protect the cyl-
inder, piston rings, etc. from corrosion.
a. Remove the spark plug cap and spark
plug.
b. Pour a teaspoonful of engine oil into the
spark plug bore.
c. Install the spark plug cap onto the spark
plug, and then place the spark plug on the
cylinder head so that the electrodes are
grounded. (This will limit sparking during
the next step.)
d. Turn the engine over several times with
the starter. (This will coat the cylinder wall
with oil.)
e. Remove the spark plug cap from the spark
plug, and then install the spark plug and
the spark plug cap.
6. Lubricate all control cables and the pivoting
points of all levers and pedals.
7. Check and, if necessary, correct the tire air
pressure, and then block up the ATV so that Specified amount:
7.5 ml of stabilizer to each liter of fuel (or 1 oz
of stabilizer to each gallon of fuel)

10-1
1
2
3
4
5
6
7
8
910
11

EBU25960
SPECIFICATIONS
EBU2597E
Dimensions:
Overall length:
1700 mm (66.9 in)
Overall width:
990 mm (39.0 in)
Overall height:
980 mm (38.6 in)
Seat height:
685 mm (27.0 in)
Wheelbase:
1080 mm (42.5 in)
Ground clearance:
145 mm (5.7 in)
Minimum turning radius:
2900 mm (114 in)
Weight:
With oil and fuel:
152.0 kg (335 lb)
Noise and vibration level:
Noise level (77/311/EEC):
75.1 dB(A)
Vibration on seat (EN1032, ISO5008):
Will not exceed 0.5 m/s
2

Vibration on handlebar (EN1032, ISO5008):
Will not exceed 2.5 m/s
2

Engine:
Engine type:
Air cooled 4-stroke, SOHCCylinder arrangement:
Forward-inclined single cylinder
Displacement:
124 cm
3

Bore
×
stroke:
49.0
×
66.0 mm (1.93
×
2.60 in)
Compression ratio:
9.00 :1
Starting system:
Electric starter
Lubrication system:
Wet sump

Engine oil:
Recommended brand:
YAMALUBE
Type:
SAE 5W-30, 10W-30, 10W-40, 15W-40, 20W-40 or
20W-50

10-2
1
2
3
4
5
6
7
8
910
11

Recommended engine oil grade:
API service SG type or higher, JASO standard MA
Engine oil quantity:
Periodic oil change:
1.25 L (1.32 US qt, 1.10 Imp.qt)
Transmission oil:
Quantity:
0.6 L (0.63 US qt, 0.53 Imp.qt)
Air filter:
Air filter element:
Wet element
Fuel:
Recommended fuel:
Regular unleaded gasoline onlyFuel tank capacity:
7.0 L (1.85 US gal, 1.54 Imp.gal)
Fuel reserve amount:
1.3 L (0.34 US gal, 0.29 Imp.gal)
Carburetor:
Type
×
quantity:
VM18SH x 1
Spark plug (s):
Manufacturer/model:
NGK/CR7HSA
Spark plug gap:
0.6–0.7 mm (0.024–0.028 in)
Clutch:
Clutch type:
Dry, centrifugal automatic
Transmission:
Primary reduction system:
Helical gear/spur gear
Primary reduction ratio:
43/14
×
40/17 (7.226)
Secondary reduction system:
Chain drive
Secondary reduction ratio:
32/12 (2.666)
Transmission type:
V-belt automatic
Operation:
Centrifugal automatic type
Reverse gear:
49/14
×
49/15
×
40/17 (26.902)
-20 -10 0
1020 304050 ˚C
SAE 15W-40
SAE 20W-40SAE 20W-50
SAE 10W-40
SAE 5W-30
SAE 10W-30

INDEX
A
Accessories and loading ................................................ 6-6
Air filter elements, engine and V-belt filter
cleaning...................................................................... 8-15
B
Battery .................................................................. 5-6
,
8-39
Brake lever free play, adjusting the front...................... 8-27
Brake lever free play (rear), adjusting .......................... 8-31
Brake lever, front ............................................................ 4-4
Brake lever, rear............................................................. 4-4
Brake levers, checking and lubricating......................... 8-36
Brakes .......................................................................... 8-26
Brakes, front and rear .................................................... 5-3
Brake shoes, checking the front and rear .................... 8-26
C
Cables, checking and lubricating ................................. 8-36
Carburetor, adjusting.................................................... 8-23
Carrier, front ................................................................. 4-11
Carrier, rear .................................................................. 4-11
Chassis fasteners........................................................... 5-5
Cleaning ......................................................................... 9-1
D
Drive chain ..................................................................... 5-3
Drive chain, lubricating ................................................. 8-35
Drive chain slack .......................................................... 8-32
Drive select lever............................................................ 4-6
Drive select lever and driving in reverse ........................ 6-3
E
Engine break-in .............................................................. 6-4
Engine, cold start ........................................................... 6-1
Engine idling speed ...................................................... 8-23
Engine oil ............................................................... 5-3
,
8-9
Engine, starting a warm ................................................. 6-2
Engine stop switch ......................................................... 4-2
F
Front knuckle pivots, lubricating ................................... 8-38
Fuel ........................................................................ 4-6
,
5-3
Fuel cock ........................................................................ 4-8
Fuel tank cap.................................................................. 4-6
Fuse, replacing............................................................. 8-42
H
Handlebar switches ........................................................ 4-2
Headlight beam, adjusting............................................ 8-45
Headlight bulb, replacing.............................................. 8-43
Horn switch .................................................................... 4-2
I
Identification numbers .................................................. 11-1
Indicator lights ................................................................ 4-1
Instruments, lights and switches .................................... 5-6
K
Key identification number ............................................. 11-1
L
Label locations ............................................................... 1-1
Light switch .................................................................... 4-2