Page 274 of 378
8-21 1. Final gear oil
2. Correct oil level
3. Oil filler bolt
1. Huile de transmission finale
2. Niveau d’huile correct
3. Boulon de l’orifice de remplissage d’huile
1. Aceite de la transmisión final
2. Nivel de aceite exacto
3. Perno de llenado de aceite
EBU00825
Final gear oil
Final gear oil measurement
1. Place the machine on a level place.
2. Remove the oil filler bolt and check the oil lev-
el. It should be up to the brim of the hole. If
the level is low, add oil to raise it to the proper
level.CAUTION:
Be sure no foreign material enters the final
gear case. 3. Install the oil filler bolt and tighten it to the
specified torque.
Final gear oil replacement
1. Remove the final gear case cover.
2. Place the machine on a level place.
3. Place a container under the final gear case to
collect the used oil. Tightening torque:
Oil filler bolt:
23 Nm (2.3 m·kgf)
U4XE64.book Page 21 Thursday, May 30, 2002 1:49 PM
Page 298 of 378

8-45 1. Minimum level mark
1. Repère de niveau minimum
1. Marca de nivel mínimo
EBU00755
Brake fluid level inspection
Insufficient brake fluid may let air enter the brake
system, possibly causing the brakes to become in-
effective.
Before riding, check that the brake fluid is above
the lower level and replenish when necessary.
Observe these precautions:
1. When checking the fluid level, make sure the
top of the master cylinder is level by turning
the handlebars.
2. Use only the designated quality brake fluid.
Otherwise, the rubber seals may deteriorate,
causing leakage and poor brake perfor-
mance.
3. Refill with the same type of brake fluid. Mixing
fluids may result in a harmful chemical reac-
tion and lead to poor brake performance.
4. Be careful that water does not enter the mas-
ter cylinder when refilling. Water will signifi-
cantly lower the boiling point of the fluid and
may result in vapor lock. Recommended brake fluid: DOT 4
U4XE64.book Page 45 Thursday, May 30, 2002 1:49 PM
Page 356 of 378
10-1
EBU00428
SPECIFICATIONS
Model YFM250X
Dimension:
Overall length 1,940 mm
Overall width 1,080 mm
Overall height 1,118 mm
Seat height 780 mm
Wheelbase 1,170 mm
Minimum ground clearance 150 mm
Minimum turning radius 2,900 mm
Basic weight:
With oil and full fuel tank 213 kg
Noise and vibration level:
Noise level (71/311/EEC) 75.3 dB (A)
Vibration on seat (EN1032, ISO5008) Not exceed 0.5 (m/s
2)
Vibration on handlebar (EN1032, ISO5008) Not exceed 2.5 (m/s2)
U4XE64.book Page 1 Thursday, May 30, 2002 1:49 PM