2003 YAMAHA YFM660R weight

7-73
WHAT TO DO IF ...
This section is designed to be a reference guide
only. Be sure to read each section on riding tech-
niques completely.
WHAT TO DO ...

If your ATV doesn’t turn when you want it to:
Bring the ATV to a stop and practice the turning
maneuvers again. Be sure you are putting your
weight on the footboard to the outside of the
turn. Position your weight over the front wheels
for better control. (See pages 7-39–7-43.)


If your ATV begins to tip while turning:
Lean more into the turn to regain balance. If
necessary, gradually let off the throttle and/or
steer to the outside of the turn. (See pages
7-39–7-43.)


If your ATV starts to slide sideways:
Steer in the direction of the slide if you have the
room.
Applying the brakes or accelerating is not rec-
ommended until you have corrected the slide.
(See pages 7-69–7-71.)
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7-75

If your ATV can’t make it up a hill you are trying
to climb:
Turn the ATV around if you still have forward
speed. If not, stop, dismount on the uphill side
of the ATV and physically turn the ATV around.
If the ATV starts to slip backwards DO NOT
USE THE REAR BRAKE - the ATV may tip
over on top of you. Dismount the ATV on the
uphill side. (See pages 7-45–7-53.)


If your ATV is traversing a sloping surface:
Be sure to ride with your weight positioned to-
wards the uphill side of the ATV to maintain
proper balance. If the ATV starts to tip, steer
down the hill (if there are no obstacles in your
way) to regain balance. If you discover that the
ATV is going to tip over, dismount on the uphill
side. (See pages 7-59–7-61.)
U5LP62.book Page 75 Wednesday, May 8, 2002 11:24 AM

8-81 a. Drive chain slack
a. Flèche de la chaîne de transmission
a. Tensión de la cadena de transmissión
EBU01144
Drive chain slack checkNOTE:_ Move the ATV back and forth and find the tightest
position of the drive chain. Check and/or adjust the
chain slack while it is in this tightest position. _To check the drive chain slack, all tires must be
touching the ground and there should be no weight
on it. Check the drive chain slack at the position
shown in the illustration Normal slack is approxi-
mately 27–37 mm. If the slack exceeds 37 mm,
adjust it to specification.
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10-1
EBU00428
SPECIFICATIONS
MODEL YFM660R
Dimension:
Overall length
Overall width
Overall height
Seat height
Wheel base
Ground clearance
Minimum turning radius1,830 mm
1,100 mm
1,150 mm
860 mm
1,245 mm
265 mm
3,300 mm
Basic weight:
With oil and full fuel tank 193 kg
Engine:
Type
Cylinder arrangement
Displacement
Bore
× stroke
Compression ratio
Starting system
Lubrication systemLiquid-cooled, 4-stroke, SOHC
Forward inclined single cylinder
660 cm
3
100
× 84 mm
9.2 : 1
Electric starter
Dry sump
U5LP62.book Page 1 Wednesday, May 8, 2002 11:24 AM

11-1
EBU01070
Conversion tableACS-02EAll specification data in this manual are listed in SI
and METRIC UNITS.
Use this table to convert METRIC unit values to
IMPERIAL unit values.
Example:
METRIC
VALUECONVERSION
FACTORIMPERIAL
VALUE
2 mm× 0.03937 = 0.08 in
Conversion table
METRIC SYSTEM TO IMPERIAL SYSTEM
Metric unitConversion
factorImperial unit
Torquem·kgf
m·kgf
cm·kgf
cm·kgf
× 7.233× 86.794× 0.0723× 0.8679ft·lbf
in·lbf
ft·lbf
in·lbf
Weightkg
g× 2.205× 0.03527lb
oz
Speed km/h× 0.6214 mi/h
Distancekm
m
m
cm
mm× 0.6214× 3.281× 1.094× 0.3937× 0.03937mi
ft
yd
in
in
Volume,
Capacitycc (cm
3)
cc (cm3)
L (liter)
L (liter)
× 0.03527× 0.06102× 0.8799× 0.2199oz (IMP liq.)
cu·in
qt (IMP liq.)
gal (IMP liq.)
Miscellaneouskg/mm
kgf/cm
2
°
C
× 55.997× 14.2234× 1.8 + 32 lb/in
psi (lbf/in
2)
°
F
U5LP62.book Page 1 Wednesday, May 8, 2002 11:24 AM