Technical Data WR 250 2008

Engine
Type Single cylinder, 2-stroke, reed valve and H.T.S. valve with mechanical control on exhaust port
Bore 66.4 mm
Stroke 72 mm
Displacement 249.3 cc
Compression ratio 8.4 : 1
Starting Kick
Cooling Liquid-cooled
Radiator 2
Lubrication Premix 50 : 1
Ignition Electronic C.D.I., analogue type with variable advance
Spark plug type NGK B 8EG
Spark plug gap 0.6 - 0.7 mm
Carburetor Mikuni TMX 38
Clutch Wet, multi-plate, mechanic control
Driving disc number 8
Driven disc number 7

Chassis
Type Steel single tube cradle with steel round tubes
Rear frame in light alloy
Front suspension MARZOCCHI USD telescopic hydraulic fork with advanced axle compression and rebound stroke adjustment
Fork leg diameter 45 mm
Fork travel 300 mm
Rear suspension SACHS Progressive Soft Damp type with single hydraulic shock absorber, spring pre-load adjustment. Compression and rebound adjustment (compression stroke - double adjustment)
Rear wheel travel 320 mm
Front brake 260 mm BREMBO fixed disc type with hydraulic control and floating caliper
Rear brake 240 mm BREMBO floating disc type with hydraulic control and floating caliper
Rim front 1.60" x 21", light alloy
Rim rear 2.15" x 18", light alloy
Tyre front 90/90-21" MICHELIN Enduro Competition MS
Tyre rear 140/80-18" MICHELIN Enduro Competition 3
WR 250

Transmission
Primary drive Secondary drive
Engine sprocket 27 Z/teeth Trans sprocket 13 Z/teeth
Clutch gear 69 Z/teeth Rear wheel sprocket 48 Z/teeth
Transmission ratio 2.555 Transmission ratio 3.692
Type Constant mesh gear type Chain D.I.D 520 V6
Speed 5
Internal ratios 2.142 (30/14) Overall ratios 20.220
2nd   1.750 (28/16) 2nd   16.513
3rd   1.437 (23/16) 3rd   13.654
4th   1.210 (23/19) 4th   11.422
5th   1.053 (20/19) 5th   9.932
Electrical Equipment
Voltage 12 V
Head light 35/35 W
Pilot light 3 W
Tail light 5 W
Stop light 21 W
Turn signal 10 W
Warning lights 1.2 W


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