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8-95
3. Refill with the same type of brake fluid. Mixing
fluids may result in a harmful chemical reac-
tion and lead to poor brake performance.
4. Be careful that water does not enter the mas-
ter cylinder reservoir when refilling. Water will
significantly lower the boiling point of the fluid
and may result in vapor lock.
5. Brake fluid may deteriorate painted surfaces
or plastic parts. Always clean up spilled fluid
immediately.
6. Have a Yamaha dealer check the cause if the
brake fluid level goes down.
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8-107
EBU00570
Cable inspection and lubrication
WARNING
Inspect cables frequently and replace if dam-
aged. Corrosion can result when the outer cov-
ering of control cables becomes damaged.
Cables can also become frayed or kinked. Op-
eration 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
U5KM60.book Page 107 Thursday, June 21, 2001 2:40 PM
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8-119
WARNING
Battery electrolyte is poisonous and danger-
ous, causing severe burns, etc. It contains sul-
furic acid. Avoid contact with skin, eyes or
clothing.
Antidote:
EXTERNAL: Flush with water.
lNTERNAL: Drink large quantities of water
or milk. Follow with milk of magnesia, beat-
en egg or vegetable oil. Call a physician
immediately.
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 us-
ing in an enclosed space. Always shield your
eyes when working near batteries.
KEEP OUT OF REACH OF CHILDREN.
U5KM60.book Page 119 Thursday, June 21, 2001 2:40 PM
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9-7
EBU00427
B. STORAGE
Long term storage (60 days or more) of your ma-
chine will require some preventive procedures to
guard against deterioration. After thoroughly
cleaning the machine, prepare for storage as fol-
lows:
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 ta-
blespoon of SAE 10W30 or 20W40 motor oil
in the spark plug hole and reinstall 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.
4. Block up the frame to raise all wheels off the
ground.
U5KM60.book Page 7 Thursday, June 21, 2001 2:40 PM
Page 416 of 442
9-9
5. Tie a plastic bag over the exhaust pipe outlet
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.
U5KM60.book Page 9 Thursday, June 21, 2001 2:40 PM
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10-1
EBU00428
SPECIFICATIONS
Model YFM660FP
Dimensions:
Overall length 2,085 mm
Overall width 1,150 mm
Overall height 1,210 mm
Seat height 880 mm
Wheelbase 1,275 mm
Minimum ground clearance 275 mm
Minimum turning radius 3,200 mm
Basic weight:
With oil and full fuel tank 290 kg
Noise and vibration level:
Noise level (77/311/EEC) 80 dB (A)
Vibration on seat (EN1032, ISO5008) Not exceed 0.5 m/s
2
Vibration on handlebar (EN1032, ISO5008) 2.8 m/s
2
Engine:
Engine type Liquid-cooled 4-stroke, SOHC
Cylinder arrangement Forward-inclined single cylinder
Displacement 660 cm
3
Bore
× stroke 100
× 84 mm
U5KM60.book Page 1 Thursday, June 21, 2001 2:40 PM
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10-2
10
Compression ratio 9.1 :1
Starting system Electric and recoil starter
Lubrication system Wet sump
Engine oil:
Type
Recommended engine oil classification API Service SE, SF, SG type or higherModel YFM660FP
-20˚-10˚0˚
10˚20˚30˚40˚50˚C
10W/30
15W/4020W/4020W/50
10W/40
5W/30
CAUTION:
Be sure to use motor oils that do not contain anti-
friction modifiers. Passenger car motor oils (often
labeled “Energy Conserving II”) contain anti-fric-
tion additives which will cause clutch and/or
starter clutch slippage, resulting in reduced com-
ponent life and poor engine performance.
U5KM60.book Page 2 Thursday, June 21, 2001 2:40 PM
Page 420 of 442
10-3
Engine oil:
Quantity:
Periodic oil change 1.9 L
With oil filter replacement 2.0 L
Total amount 2.2 L
Final gear case oil:
Type SAE80 API “GL-4” Hypoid gear oil
Quantity:
Periodic oil change 0.25 L
Total amount 0.30 L
Differential gear case oil:
Type SAE80 API “GL-4” Hypoid gear oil
Quantity:
Periodic oil change 0.28 L
Total amount 0.33 L
Air filter: Wet type element
Fuel:
Type For Europe
REGULAR UNLEADED GASOLINE ONLY
For Oceania
UNLEADED GASOLINE ONLY
Fuel tank capacity 20 L
Fuel reserve amount 3.5 LModel YFM660FP
U5KM60.book Page 3 Thursday, June 21, 2001 2:40 PM