2-1
GENERAL SPECIFICATIONSSPEC
Model name: YZ250T1 (USA, CDN)
YZ250 (EUROPE, ZA)
YZ250T (AUS, NZ)
Model code number: 1P81 (USA, CDN, ZA)
1P82 (EUROPE)
1P84 (AUS, NZ)
Dimensions:USA, ZAAUS, NZ EUROPE CDN
Overall length 2,179 mm←2,188 mm 2,186 mm
(85.8 in) (86.1 in) (86.1 in)
Overall width 827 mm←←←
(32.6 in)
Overall height 1,306 mm←1,310 mm 1,309 mm
(51.4 in) (51.6 in) (51.5 in)
Seat height 989 mm←992 mm←
(38.9 in) (39.1 in)
Wheelbase 1,481 mm←1,485 mm←
(58.3 in) (58.5 in)
Minimum ground clearance 383 mm←386 mm←
(15.1 in) (15.2 in)
Dry weight:
Without oil and fuel 96.0 kg (211.6 lb)
Engine:
Engine type Liquid cooled 2-stroke, gasoline
Cylinder arrangement Single cylinder, forward inclined
Displacement 249 cm
3(8.76 lmp oz, 8.42 US oz)
Bore ×Stroke 66.4 ×72 mm (2.614 ×2.835 in)
Compression ratio 9.1~10.9 : 1 (Expect for EUROPE)
9.0~10.6 : 1 (For EUROPE)
Starting system Kick starter
Lubrication system: Premix (30 : 1)(Yamalube 2-R)
Oil type or grade (2-Cycle):
Transmission oil Yamalube 4 (10W-30) or SAE 10W-30 type SE
motor oil
Periodic oil change 0.75 L (0.66 Imp qt, 0.79 US qt)
Total amount 0.80 L (0.70 Imp qt, 0.85 US qt)
Coolant capacity (including all routes): 1.20 L (1.06 Imp qt, 1.27 US qt)
Air filter: Wet type element
Fuel:
Type Premium unleaded gasoline
only with a research octane
number of 95 or higher
Tank capacity 8.0 L (1.76 Imp gal, 2.11 US gal)
EC200000
SPECIFICATIONSEC211000
GENERAL SPECIFICATIONS
1P8-9-30-2 19/5/04 9:08 AM Page 2
3-30
REAR SHOCK ABSORBER SPRING PRELOAD
ADJUSTMENTINSP
ADJ
EC36M014
REAR SHOCK ABSORBER SPRING
PRELOAD ADJUSTMENT
1. Elevate the rear wheel by placing the suit-
able stand under the engine.
2. Remove:
9Rear frame
3. Loosen:
9Locknut 1
4. Adjust:
9Spring preload
By turning the adjuster 2.
NOTE:
9Be sure to remove all dirt and mud from around
the locknut and adjuster before
adjustment.
9The length of the spring (installed) changes 1.5
mm (0.06 in) per turn of the adjuster.
cC
Never attempt to turn the adjuster beyond
the maximum or minimum setting.
5. Tighten:
9Locknut
6. Install:
9Rear frame (upper)
9Rear frame (lower)
Stiffer Increase the spring preload.
(Turn the adjuster 2 2
in.)
Softer Decrease the spring pre-
load. (Turn the adjuster 2 2
out.)
Extent of adjustment
240.5~258.5 mm
(9.47~10.18 in)
Spring length (installed) a a
:
Standard length
251 mm (9.88 in)
*253 mm (9.96 in)
32 Nm (3.2 m•kg, 23 ft•lb)
29 Nm (2.9 m•kg, 21 ft•lb)
*For EUROPE
1P8-9-30-3B 19/5/04 9:12 AM Page 24
7-19
SETTINGTUN
EC72B000
Rear suspension setting
The rear suspension setting should be made
depending on the rider’s feeling of an actual run
and the circuit conditions.
The rear suspension setting includes the follow-
ing two factors:
1. Setting of spring preload
9Change the set length of the spring.
9Change the spring.
2. Setting of damping force
9Change the rebound damping.
9Change the compression damping.
EC72C001
Choosing set length
1. Place a stand or block under the engine to
put the rear wheel above the floor, and mea-
sure the length abetween the rear wheel
axle center and the rear fender holding bolt.
2. Remove the stand or block from the engine
and with a rider astride the seat, measure
the sunken length bbetween the rear wheel
axle center and the rear fender holding bolt.
3. Loosen the locknut 1and make adjustment
by turning the spring adjuster 2to achieve
the standard figure from the subtraction of
the length bfrom the length a.
Standard figure:
90~100 mm (3.5~3.9 in)
1P8-9-30-7 20/5/04 2:10 PM Page 42
