2003 YAMAHA GRIZZLY 660 clutch

5-17
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-friction additives which will cause
clutch and/or starter clutch slippage, resulting
in reduced component life and poor engine
performance.
Oil quantity:
Total amount:
2.2 L
Periodic oil change:
1.9 L
With oil filter replacement:
2.0 L
U5KM60.book Page 17 Thursday, June 21, 2001 2:40 PM

7-37
With the engine idling, shift the drive select lever to
the low position “L” or the high position “H”. Apply
the throttle slowly and smoothly. The centrifugal
clutch will engage and you will start to accelerate.
If the throttle is applied too abruptly, the front
wheels may lift off the ground resulting in a loss of
directional control. Avoid higher speeds until you
are thoroughly familiar with the operation of your
ATV.
When slowing down or stopping, release the throt-
tle and apply the brakes smoothly and evenly. Im-
proper use of the brakes can cause the tires to
lose traction, reducing control and increasing the
possibility of an accident.CAUTION:_ Do not shift from drive position low “L” to high
“H” or vice versa without coming to a com-
plete stop. Damage to the engine or drive train
may occur. _
U5KM60.book Page 37 Thursday, June 21, 2001 2:40 PM

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

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

10-4
Carburetor:
Type / quantity BSR42 / 1
Manufacturer MIKUNI
Spark plug:
Type/manufacturer DPR8EA-9 / NGK
Spark plug gap 0.8 ~ 0.9 mm
Clutch type Wet, centrifugal automatic
Transmission:
Primary reduction system V-belt
Secondary reduction system Spur gear
Secondary reduction ratio 39/24
× 24/18
× 33/9 (7.944)
Transmission type V-belt automatic
Operation Left hand operation
Reverse gear 25/17 (1.471)
Sub transmission ratio low 37/15 (2.466)
high 28/19 (1.473)
Chassis:
Frame type Steel tube frame
Caster angle 5°
Trail 26 mmModel YFM660FP
U5KM60.book Page 4 Thursday, June 21, 2001 2:40 PM