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8-63
EBU00382Replenishing 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 upper
and lower level marks. Use only distilled
water if refilling is necessary.
2. Disconnect the negative (–) lead.
3. Disconnect the positive (+) lead and
remove the battery.cCNormal tap water contains minerals which
are harmful to a battery. Therefore, refill only
with distilled water.
q
w
er
1. Maximum level mark 2. Minimum level mark
3. Negative lead 4. Positive lead1. Repére de niveau maximum 2. Repére de niveau manimum
3. Fil négatif 4. Fil positif1. Marca de máximo 2. Marca de mínimo
3. Cable Negativo 4. Cable Positivo
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8-65
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 reusing.
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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EBU00440Troubleshooting chart1. FuelCheck if there is
fuel in the fuel
tank2. CompressionUse electric starter
to see if there is
compression3. IgnitionRemove plug and
check electrodes
Wet
Wipe clean with dry
cloth
Dry
Attach plug cap and
ground to chassis
Use electric
starter
Spark weakSpark good
Ignition system normal
No spark
Ask a Yamaha dealer to inspect
Adjust plug gap or
replace plug
There is compresson
Compression normalAsk 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. BatteryUse 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 fuelTurn the fuel
cock to “ON”
No fuel
Fuel cock clogged
Clean the fuel filter
and the fuel tank
Clean fuel cock
8-73
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9-9
4. Block up the frame to raise all wheels off
the ground.
5. Tie a plastic bag over the exhaust pipe out-
let to prevent moisture from entering.
6. 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.
7. 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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10-5
Model YFM80W
Brake:
Front brake type Drum brake
Operation Right hand operation
Rear brake type Drum brake
Operation Left hand and right foot operation
Suspension:
Front Leading armRear Swingarm
Shock absorber:
Front Coil spring/Oil damperRear Coil spring/Oil damper
Wheel travel:
Front wheel travel 57 mmRear wheel travel 56 mm
Electrical:
Ignition system C.D.I.
Charging system C.D.I. magnetoBattery type/voltage, capacity 12N7D-3B/12V, 7Ah
Indicator light voltage, wattage ×quantity:Neutral 12V, 1.7W ×1
Fuse: 5A
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