Page 306 of 442
8-41
9. Fill the engine with sufficient oil to reach the
specified level. Install the dipstick and tighten
it.CAUTION:_
Do not put in any chemical additives. En-
gine oil also lubricates the clutch and addi-
tives could cause clutch slippage.
Be sure no foreign material enters the
crankcase.
_
Recommended oil:
See page 10-2.
Oil quantity:
Total amount:
2.2 L
Periodic oil change:
1.9 L
With oil filter replacement:
2.0 L
U5KM60.book Page 41 Thursday, June 21, 2001 2:40 PM
Page 308 of 442
8-43
‘1. Final gear oil drain bolt
1. Boulon de vidange de l’huile de couple conique arrière
1. Perno de drenaje de aceite de la transmisión final
10. Start the engine and warm it up for several
minutes. While warming up, check for oil
leakage. If oil leakage is found, stop the en-
gine immediately and check for the cause.
11. Install the panels.
EBU00880
Final gear oil
The final gear case must be checked for oil leak-
age before each ride. If any leakage is found, have
a Yamaha dealer check and repair the ATV.
Final gear oil replacement
1. Place the machine on a level place.
2. Place a container under the final gear case to
collect the used oil.
3. Remove the oil filler bolt and the drain bolt to
drain the oil.
U5KM60.book Page 43 Thursday, June 21, 2001 2:40 PM
Page 314 of 442
8-49 1. Differential gear oil
2. Differential gear case oil filler bolt
3. Specified level
1. Huile de différentiel
2. Boulon d’orifice de remplissage du carter de différentiel
3. Niveau d’huile spécifié
1. Aceite de engranajes del diferencial
2. Perno de relleno de aceite de la caja del diferencial
3. Nivel especificado
EBU00706
Differential gear oil
Differential gear oil measurement
1. Place the machine on a level place.
2. Remove the oil filler bolt and check the oil lev-
el. It should be up to the brim of the hole. If
the level is low, add sufficient oil to raise it to
the specified level.CAUTION:
Be sure no foreign material enters the differen-
tial gear case. 3. Install the oil filler bolt and tighten it to the
specified torque.
Tightening torque:
Oil filler bolt:
23 Nm (2.3 m·kgf)
U5KM60.book Page 49 Thursday, June 21, 2001 2:40 PM
Page 316 of 442
8-51 1. Differential gear case oil drain bolt
1. Boulon de vidange de l’huile de différentiel
1. Perno de drenaje de aceite de engranajes del diferencial
Differential gear oil replacement
1. Place the machine on a level place.
2. Place a container under the differential gear
case to catch the oil.
3. Remove the filler bolt and drain bolt to drain
the oil.
4. Install the drain bolt and tighten it to the spec-
ified torque.
Tightening torque:
Drain bolt:
10 Nm (1.0 m·kgf)
U5KM60.book Page 51 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