Page 122 of 378
5-13
EBU01180
Engine oil
Make sure the engine oil is at the specified level.
Fill with oil as necessary. (See pages 8-13–8-19
for details.)
Recommended oil:
Recommended engine oil classification:
API Service SE, SF, SG type or higher
-20˚ -10˚ 0˚
10˚20˚ 30˚40˚50˚C
10W/30
15W/4020W/4020W/50
10W/40
5W/30
U4XE64.book Page 13 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 357 of 378
10-2
10
Engine:
Type Air-cooled 4-stroke, SOHC
Cylinder arrangement Single cylinder, forward-inclined
Displacement 229.6 cm
3
Bore
× stroke 71
× 58 mm
Compression ratio 8.7:1
Starting system Electric starter and recoil starter
Lubrication system Wet sump
Engine oil:
Type
Quantity:
Periodic oil change (engine oil)
Periodic oil change
(engine oil with oil filter replacement)
Total amountSee page 5-13
1.5 L
1.6 L
1.8 L
Final gear oil:
Type SAE 80 API “GL-4” Hypoid Gear Oil
Quantity
Total amount 0.27 LModel YFM250X
E-10-E.fm Page 2 Monday, June 3, 2002 11:25 AM
Page 360 of 378
10-5
Suspension:
Fr on t S tr ut
Rear Swingarm (monocross)
Shock absorber:
Front Coil spring / Oil damper
Rear Coil spring / Oil damper
Wheel travel:
Front 125 mm
Rear 135 mm
Electrical:
Ignition system DC, C.D.I.
Generator system AC magneto
Battery type / voltage, capacity YB14A-A2/12 V, 14 Ah
Headlight type: Bulb typeModel YFM250X
U4XE64.book Page 5 Thursday, May 30, 2002 1:49 PM