2004 YAMAHA WOLVERINE 450 compression ratio

8-131
EBU00413
Troubleshooting
Although Yamaha machines receive a rigid in-
spection 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 pow-
er. The troubleshooting chart describes a quick,
easy procedure for making checks. If your ma-
chine 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 machine. Use only genuine
Yamaha parts on your machine. Imitation parts
may look like Yamaha parts, but they are often in-
ferior. 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.
U5ND61.book Page 131 Thursday, June 5, 2003 7:02 PM

10-1
EBU00428
SPECIFICATIONS
ModelYFM450FA
Dimensions:
Overall length 1,984 mm
Overall width 1,085 mm
Overall height 1,120 mm
Seat height 827 mm
Wheelbase 1,233 mm
Ground clearance 245 mm
Minimum turning radius 3,000 mm
Basic weight:
With oil and full fuel tank 267 kg
Noise and vibration level:
Noise level (77/311/EEC) (for Europe) 79.7 dB(A)
Vibration on seat (EN1032, ISO5008) (for Europe) Will not exceed 0.5 m/s
2
Vibration on handlebar (EN1032, ISO5008)
(for Europe)Will not exceed 2.5 m/s
2
Engine:
Engine type Liquid-cooled 4-stroke, SOHC
Cylinder arrangement Forward-inclined single cylinder
Displacement 421 cm
3
Bore
× stroke 84.5
× 75.0 mm
Compression ratio 10 :1
U5ND61.book Page 1 Thursday, June 5, 2003 7:02 PM

10-7
FBU00428
CARACTÉRISTIQUES TECHNIQUESModèle YFM450FA
Dimensions:
Longueur hors tout 1.984 mm
Largeur hors tout 1.085 mm
Hauteur hors tout 1.120 mm
Hauteur de la selle 827 mm
Empattement 1.233 mm
Garde au sol 245 mm
Rayon de braquage minimal 3.000 mm
Poids en ordre de marche:
Avec pleins d’huile et de carburant 267 kg
Niveau de bruit et de vibrations:
Niveau de bruit (77/311/EEC) (Pour l’Europe) 79,7 dB (A)
Vibrations sur la selle (EN 1032, ISO 5008)
(Pour l’Europe) 0,5 m/s
2 maximum
Vibrations au guidon (EN 1032, ISO 5008)
(Pour l’Europe) 2,5 m/s2 maximum
Moteur:
Type de moteur 4 temps, refroidissement par liquide, arbre à cames en tête
(SOHC)
Disposition du cylindre Monocylindre incliné vers l’avant
Cylindrée 421 cm3
Alésage ×
course 84,5 ×
75,0 mm
Taux de compression 10:1
U5ND61.book Page 7 Thursday, June 5, 2003 7:02 PM