oil YAMAHA YFM50S 2004 User Guide

8-17
7. Fill the engine with oil and install the dip-
stick.
cC
Be sure no foreign material enters the
crankcase.
8. Warm up the engine for several minutes at
idle speed. Check for oil leakage while
warming up.
cC
If oil leakage is found, stop the engine imme-
diately and check for the cause.
Recommended oil type:
20W50, 20W40, 15W40, 10W40,
10W30, 5W30
Recommended oil classification:
API Service SE, SF, SG type or higher
Oil quantity:
Periodic oil change:
0.8L
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1 2
3
8-19
EBU00869
Final gear oil
Final gear oil measurement
1. Place the ATV on a level surface.
2. Remove the dipstick and wipe it off with a
clean rag. Insert the dipstick in the filler
hole without screwing it in.
3. Remove the dipstick and inspect the oil
level.
4. The oil level should be between the maxi-
mum and minimum marks. If the level is
low, add oil to raise it to the proper level.
cC
Be sure no foreign material enters the final
gear case.
5. Install the dipstick.
Final gear oil replacement
1. Place the ATV on a level place.
1. Dipstick
2. Maximum level mark 3. Minimum level mark
1. Jauge
2. Repère de niveau maximum 3. Repère de niveau minimum
1. Varilla de medición
2. Marca de máximo 3. Marca de mínimo
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8-21
2. Place a container under the final gear
case.
3. Remove the dipstick and drain bolt to drain
the oil.
4. Install the drain bolt and tighten to specifi-
cation.
5. Fill the final gear case with oil.
cC
Be sure no foreign material enters the final
gear case.
6. Install the dipstick.
7. Check for oil leakage. If oil leakage is
found, check for the cause.
q
1. Drain bolt1. Boulon de vidange1. Perno de drenaje
Tightening torque
Drain bolt:
23 Nm (2.3 m0kgf)
Recommended oil:
SAE 80 API “GL-4” Hypoid gear oil
Oil quantity:
0.12 L
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2
1
1. Fastener 2. Air filter element1. Attache 2. Elément du filtre à air1. Sujeción 2. Elemento filtrante de aire
8-29
2. Remove the air filter case cover by
unhooking the fasteners.
3. Remove the air filter element by unhooking
the fastener.
4. Wash the air filter element gently but thor-
oughly in solvent.
w
Always use parts cleaning solvent to clean
the air filter element. Never use low flash
point solvents or gasoline to clean the air fil-
ter element because the engine could catch
fire or explode.
5. Squeeze the excess solvent out of the air
filter element and let it dry.
cC
Do not twist the air filter element when
squeezing it.
6. Inspect the air filter element. If damaged,
replace it.
7. Apply Yamaha foam air filter oil or other
quality foam air filter oil to the air filter ele-
ment. If foam air filter oil is not available,
SAE10W30 motor oil may be used.
q
ww
1. Air filter case cover 2. Fastener (×4)1 . Couvercle du boîtier de filtre à air 2 .Attache (×4)1.Cubierta de la caja del filtro de aire2. Sujeción (×4)
5YF-9-60 8 4/24/03 6:35 PM Page 8-29

8-51
EBU00570
Cable inspection and lubrication
w
Inspect cables frequently and replace if dam-
aged. Corrosion can result when the outer
covering of control cables becomes dam-
aged. Cables can also become frayed or
kinked. Operation of controls could be
restricted, which could cause an accident or
injury.
Lubricate the inner cables and the cable ends. If
the cables do not operate smoothly, ask a
Yamaha dealer to replace them.
Recommended lubricant:
Engine oil
5YF-9-60 8 4/24/03 6:35 PM Page 8-51

8-59
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 produce 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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9-7
EBU00427
B. STORAGE
Long term storage (60 days or more) of your
machine will require some preventive proce-
dures to guard against deterioration. After thor-
oughly cleaning the machine, prepare for stor-
age as follows:
1. Fill the fuel tank with fresh fuel and add
fuel stabilizer (if available).
NOTE:
Use of fuel stabilizer eliminates the need to
drain the fuel system. Consult a Yamaha dealer
if the fuel system is to be drained instead.
2. Remove the spark plug, pour about one
tablespoon of SAE 10W30 or 20W40
motor oil in the spark plug hole and rein-
stall the spark plug. Ground the spark plug
wire and turn the engine over several times
to coat the cylinder wall with oil.
3. Lubricate all control cables.
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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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10-1
Model YFM50
Dimensions:
Overall length 1,537 mm
Overall width 825 mm
Overall height 915 mm
Seat height 618 mm
Wheelbase 1,030 mm
Ground clearance 70 mm
Minimum turning radius 2,300 mm
Basic weight:
With oil and full fuel tank 115 kg
Engine:
Type Air-cooled 4-stroke, SOHC
Cylinder arrangement Single cylinder, forward-inclined
Displacement 49.0 cm
3
Bore × Stroke 39.0 ×41.4 mm
Compression ratio 10.0 : 1
Starting system Electric starter
Lubrication system Wet sump
EBU00428
SPECIFICATIONS
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10-2
10
MODEL YFM50
Engine oil:
Type
Recommended engine oil classification: API Service SE, SF, SG type or higher
Quantity:
Periodic oil change 0.80 L
cC
In order to prevent clutch slippage (since the
engine oil also lubricates the clutch), do not
mix any chemical additives. Do not use oils
with a diesel specification of “CD” or oils of a
higher quality than specified. In addition, do
not use oils labeled “ENERGY CONSERVING
II” or higher.
–20° 10° 20° 30° 40°
10W30
10W40
20W40
20W5050°C
0° –10°
5W30
15W40
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