2002 YAMAHA BEAR TRACKER 250 compression ratio

8-89
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.
EE.book Page 89 Monday, June 25, 2001 2:27 PM

10-2
10
Engine:
Type Air-cooled 4-stroke, SOHC
Cylinder arrangement Single cylinder, forward-inclined
Displacement 229.6 cm


Bore
× stroke 71
× 58 mm
Compression ratio 8.7:1
Starting system Electric starter and recoil starter
Lubrication system Wet sump
Engine oil:
Type
Recommended engine oil classification API Service SE, SF, SG type or higherModel YFM250X
-20˚-10˚0˚
10˚20˚30˚40˚50˚C
10W/30
15W/4020W/4020W/50
10W/40
5W/30
EE.book Page 2 Monday, June 25, 2001 2:27 PM

10-7
FBU00428
CARACTÉRISTIQUES TECHNIQUESModèle YFM250X
Dimensions:
Longueur hors tout 1.940 mm
Largeur hors tout 1.080 mm
Hauteur hors tout 1.118 mm
Hauteur de la selle 780 mm
Empattement 1.170 mm
Garde au sol minimale 150 mm
Rayon de braquage minimal 2.900 mm
Poids en ordre de marche:
Avec pleins d’huile et de carburant 213 kg
Niveau de bruit et de vibrations:
Niveau de bruit (77/311//EEC) 75,3 dB (A)
Vibrations sur la selle (EN 1032, ISO 5008) 0,5 m/s
2 maximum
Vibrations au guidon (EN 1032, ISO 5008) 2,5 m/s2 maximum
Moteur:
Type 4 temps, refroidissement par air, simple arbre à cames en
tête (SOHC)
Disposition du cylindre Monocylindre, incliné vers l’avant
Cylindrée 229.6 cm

Alésage
×
course 71 ×
58 mm
Taux de compression 8,7:1
EE.book Page 7 Monday, June 25, 2001 2:27 PM