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8-79
w
Battery electrolyte is poisonous and danger-
ous, causing severe burns, etc. It contains
sulfuric acid. Avoid contact with skin, eyes
or clothing.
Antidote:
EXTERNAL: Flush with water.
INTERNAL: Drink large quantities of water or
milk. Follow with milk of magnesia, beaten
egg or vegetable oil. Call a physician imme-
diately.
EYES: Flush with water for 15 minutes and
get prompt medical attention. Batteries pro-
duce explosive gases. Keep sparks, flame,
cigarettes or other sources of ignition away.
Ventilate when charging or using in an
enclosed space. Always shield your eyes
when working near batteries. KEEP OUT OF
REACH OF CHILDREN.
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8-81
EBU11950
Replenishing the battery fluid
A poorly maintained battery will corrode and dis-
charge quickly. The battery fluid should be
checked at least once a month.
1. The level should be between the maximum
and minimum level marks. Use only distilled
water if refilling is necessary.
2. Disconnect the negative (–) lead.
3. Disconnect the positive (+) lead, and then
remove the battery.
cC
Normal tap water contains minerals which
are harmful to a battery. Therefore, refill only
with distilled water.
w q
er
1. Maximum level mark
2. Minimum level mark
3. Negative (–) lead
4. Positive (+) lead
1. Repère de niveau maximum
2. Repère de niveau minimum
3. Fil négatif (–)
4. Fil positif (+)
1. Marca de máximo
2. Marca de mínimo
3. Cable negativo (–)
4. Cable positivo (+)
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8-83
4. When the machine is not to be used for a
month or longer, remove the battery and
store it in a cool, dark place. Completely
recharge the battery before using.
5. If the battery is to be stored for a longer
period than the above, check the specific
gravity at least once a month and recharge
the battery when it is too low.
6. Always make sure the connections are cor-
rect when putting the battery back in the
machine. Make sure the breather hose is
properly connected and is not damaged or
obstructed.
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8-99
EBU00440
Troubleshooting chart
1. Fuel
Check if there is
fuel in the fuel
tank.
2. Compression
Use electric starter
to see if there is
compression.
3. Ignition
Remove plug and
check electrodes.
WetWipe clean with dry
cloth.
DryAttach plug cap and
ground to chassis.Use electric
starter.Spark weak.
Spark good.Ignition system normal.
No spark.
Ask a Yamaha dealer to inspect.
Adjust plug gap or
replace plug.
There is compresson.Compression normal.
Ask a Yamaha dealer to inspect.No compression.
There is fuel.Turn the fuel
cock to “OFF”.
Remove the
fuel hose from
the fuel cock.
Some fuel.Turn the fuel
cock to “RES”.Restart engine.
No fuel.Supply fuel.
4. Battery
Use electric
starter.
Engine turns
over quickly.Battery good.
Engine turns
over slowly.Check fluid, recharge,
check connections.
Check fuel flow.
Water or dirt
mixed in fuel.
Turn the fuel
cock to “ON”.No fuel.Fuel cock clogged.
Clean the fuel filter
and the fuel tank.
Clean fuel cock.
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9-9
3. Clean the drive chain thoroughly and lubri-
cate it. (See page 8-59.)
4. Lubricate all control cables.
5. Block up the frame to raise all wheels off the
ground.
6. Tie a plastic bag over the exhaust pipe out-
let to prevent moisture from entering.
7. If storing in a humid or salt-air atmosphere,
coat all exposed metal surfaces with a light
film of oil. Do not apply oil to any rubber
parts or the seat cover.
8. Remove the battery and charge it. Store it in
a dry place and recharge it once a month.
Do not store the battery in an excessively
warm or cold place (less than 0°C or more
than 30°C).
NOTE:
Make any necessary repairs before storing the
machine.
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Page 346 of 362
10-5
Model YFM125
Shock absorber:
Front Coil spring/Oil damper
Rear Coil spring/Oil damper
Wheel travel:
Front 70 mm
Rear 80 mm
Electrical:
Ignition system DC. C.D.I.
Charging system A.C. Magneto
Battery type/voltage, capacity 12N12C-4A-2/12V, 12Ah
Headlight type: Bulb
Bulb volgate, wattage ×quantity:
Headlight 12V, 30 W/30 W ×2
Tail/brake light 12V, 5 W/21 W ×1
Indicator light:
Neutral 12V, 1.7 W ×1
Reverse 12V, 1.7 W ×1
Fuse: 15A
1C5-9-60-09~11 15/12/03 7:59 PM Page 16