Page 330 of 408
8-91 1. Brake pedal
1. Pédale de frein
1. Pedal de freno
EVU01480
Checking the brake pedal
Have a Yamaha dealer check the brakes at the in-
tervals specified in the periodic maintenance and
lubrication chart. There should be no free play in
the brake pedal. The brakes should operate
smoothly and there should be no brake drag. If the
brakes feel soft or spongy, this could indicate air in
the brake system. Have a Yamaha dealer check
the brake system if necessary.
WARNING
Operating with improperly serviced or adjust-
ed brakes could cause loss of braking ability,
which could lead to an accident.
After servicing:
Make sure the brakes operate smoothly
and that the brake pedal position is cor-
rect.
Make sure the brakes do not drag.
All air must be bled from the brake system.
Replacement of brake components requires
professional knowledge. These procedures
should be performed by a Yamaha dealer.
U5UG61.book Page 91 Monday, September 6, 2004 9:00 AM
Page 370 of 408

8-131
EVU01530
Troubleshooting
Although Yamaha vehicles receive a rigid inspec-
tion before shipment from the factory, trouble may
occur during operation. Any problem in the fuel,
compression, or ignition systems can cause poor
starting and loss of power. The troubleshooting
chart describes a quick, easy procedure for mak-
ing checks. If your vehicle requires any repair, take
it to a Yamaha dealer.
The skilled technicians at a Yamaha dealership
have the tools, experience, and know-how to prop-
erly service your vehicle. Use only genuine
Yamaha parts on your vehicle. Imitation parts may
look like Yamaha parts, but they are often inferior.
Consequently, they have a shorter service life and
can lead to expensive repair bills.
WARNING
Do not smoke when checking the fuel system.
Fuel can ignite or explode, causing severe in-
jury or property damage. Make sure there are
no open flames or sparks in the area, including
pilot lights from water heaters or furnaces.
U5UG61.book Page 131 Monday, September 6, 2004 9:00 AM
Page 389 of 408
10-2
10
Compression ratio 9.10 :1
Starting system Electric starter
Lubrication system Wet sump
Engine oil:
Type
Recommended engine oil classification API Service SE, SF, SG type or higherModel YXR660FA
-20˚ -10˚ 0˚
10˚20˚ 30˚40˚50˚C
10W/30
15W/4020W/4020W/50
10W/40
5W/30
CAUTION:
In order to prevent clutch slippage (since the en-
gine oil also lubricates the clutch), do not mix any
chemical additives. Do not use oils with a diesel
specification of “CD” or oils of a higher quality
than specified. In addition, do not use oils labeled
“ENERGY CONSERVING II” or higher.
U5UG61.book Page 2 Monday, September 6, 2004 9:00 AM
Page 395 of 408
10-8
Taux de compression 9,10 :1
Système de démarrage Démarreur électrique
Système de graissage Carter humide
Huile moteur :
Type
Classification d’huile moteur recommandée : Huiles de type API Service de classe SE, SF, SG ou
supérieures Modèle YXR660FA
-20˚ -10˚ 0˚
10˚20˚ 30˚40˚50˚C
10W/30
15W/4020W/4020W/50
10W/40
5W/30
ATTENTION:
Ne pas mélanger d’additif chimique à l’huile afin d’éviter
tout patinage de l’embrayage, car l’huile moteur lubrifie
également l’embrayage. Ne pas utiliser d’huile de grade die-
sel “CD” ou une huile de grade supérieur à celui spécifié.
S’assurer également de ne pas utiliser une huile portant la
désignation “ENERGY CONSERVING II” ou la même dé-
signation avec un numéro plus élevé.
U5UG61.book Page 8 Monday, September 6, 2004 9:00 AM
Page 401 of 408
10-14
Relación de compresión 9,10 :1
Sistema de arranque Arranque eléctrico
Sistema de engrase Colector de lubricante dentro del cárter
Aceite del motor:
Tipo
Clasificación recomendada del aceite del motor Tipo API Service SE, SF, SG o superiorModelo YXR660FA
-20˚-10˚0˚
10˚20˚30˚40˚50˚C
10W/30
15W/4020W/4020W/50
10W/40
5W/30
ATENCION:
Para evitar que el embrague patine (puesto que el
aceite del motor también lubrica el embrague), no uti-
lice ningún aditivo químico. No utilice aceites con la
especificación Diesel “CD” ni aceites de calidad su-
perior a la especificada. Asimismo, no utilice aceites
con la etiqueta “AHORRO DE ENERGÍA II” o supe-
rior.
U5UG61.book Page 14 Monday, September 6, 2004 9:00 AM