Page 134 of 442
5-15
EBU00947
Engine oil
Make sure the engine oil is at the specified level.
Fill with oil as necessary. (See pages 8-33 ~ 8-43
for details.)
Recommended oil:
Recommended engine oil classification:
API Service SE, SF, SG type or higher
-20˚ -10˚ 0˚
10˚20˚ 30˚40˚50˚C
10W/30
15W/4020W/4020W/50
10W/40
5W/30
U5KM60.book Page 15 Thursday, June 21, 2001 2:40 PM
Page 360 of 442
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.
U5KM60.book Page 95 Thursday, June 21, 2001 2:40 PM
Page 418 of 442
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
Page 419 of 442
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
Page 422 of 442
10-5
Tire:
Type Tubeless
Size (front) AT25
× 8-12
(rear) AT25 ×10 - 12
Brake:
Front brake type Dual disc brake
operation Right hand operation
Rear brake type Single disk brake
operation Left hand and right foot operation
Suspension:
Front suspension Double wishbone
Rear suspension Double mishbone
Shock absorber:
Front shock absorber Coil spring / Oil damper
Rear shock absorber Coil spring / Oil damper
Wheel travel:
Front wheel travel 170 mm
Rear wheel travel 225 mm
Electrical:
Ignition system DC-C.D.I.
Generator system A.C. magneto
Battery type YTX20L-BS
Battery capacity 12 V, 18 AhModel YFM660FP
U5KM60.book Page 5 Thursday, June 21, 2001 2:40 PM