DoD Racing Team

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Brand new bike...


basking in the...


sun in Bergen.

Photo: Peter C.D. Hansen

[1998 Aprilia RS250]

Photo: Aprilia

Race-preppet RS250
Race-prepared RS250 (not mine) with the original racing bodywork.

Photo: Unknown


Left side view


Fron view


Details from dash. Notice the posted max velocity - impressive, huh?


Posing "hooligans" showing off the colour schemes of '98


Fuel tank is a work of acrylic art

Photo: Monica Gebhardt and Elisabeth Svendsen from the student's camera-club, University of Oslo, Norway.

David's 1998 Aprilia RS250

Magazine reviews

Movies

    Take a look at Morten's Aprilia page where you'll find a couple of movies of Morten doing some pretty decent laps at our local racetrack, Rudskogen. (Watch out, text may turn Norwegian as these pages are just a part of a large-ish Norwegian website.)

Info

Technical specifications

Engine type

Suzuki RGV250 two-stroke, two-cylinder in 90° V formation, liquid cooled, lamellar intake in the casing. Sequential two-stage valve on the exhaust, electronically managed by a digital control unit and controlled by a stepper motor

Pistons

special alloy with a high silicon content

Bore and stroke

56 x 50.6 mm

Displacement

249.25 ccm

Compression

12 ± 0.7:1

Max power

60 bhp @ 10,200 rpm

Max torque

32 ft-lb @ 10,100 rpm

Tickover

1300 ± 100 rpm

Carburettors (2)

Mikuni TM 34 SS with flat valve (flatslides), with electronic management by electrovalves that section the maximum air passages and the idling circuits

Premix tank

1.6 litres (including 0.3 litres reserve)

Ignition

CDI digital, with advance mapping programmed on three parameters (opening of carburettors valves, opening speed, engine running speed)

Start-up

kick

Gearbox

6 speeds, entirely extractable. Forced lubrication with a volumetric pump

Gear oil

700cc, SAE 75W90

Ratios

Primary drive, 23/59 = 1:2.565

1st

11/27 = 1:2.454

2nd

16/26 = 1:1.625

3rd

17/21 = 1:1.235

4th

22/23 = 1:1.045

5th

24/22 = 1:0.916

6th

25/21 = 1:0.840

Final drive, 14/42 = 1:3.000

1st

1:18.889

2nd

1:12.505

3rd

1:9.506

4th

1:8.045

5th

1:7.054

6th

1:6.464

Alternative final drive 14/43 = 1:3.071

1st

1:19.330

2nd

1:12.803

3rd

1:9.728

4th

1:8.231

5th

1:7.215

6th

1:6.617

Frame

inclined double beam in an alloy of alluminium and magnesium, with thin wall shell structure. Sleeve and side plates cast in an alloy of alluminium and magnesium

Suspension

front: Showa fork with upside-down rods in high resistance steel, Ø 40 mm, with adjustable extension and compression. Max travel 120 mm.
rear: swinging rear fork in alloy of alluminium and magnesium, with arms with differentiated design. Single Boge/Sachs shock-absorber with separate tank, adjustable extension, compression and spring preload. Max travel 64 mm

Fork oil

436cc in each fork, 5W or 20W

Brakes

Brembo front brake with double floating disc, Ø 298 mm, caliper with 4 positions with differentiated diameter; rear brake with single disc, Ø 220 mm

Rims

in alluminium alloy, with 5 tangential spokes. Front 3.50 x 17"; rear 4.50 x 17"

Tyres

front: 120/70 ZR 17"
rear: 150/60 ZR 17". Dunlop 204F/J

Tire pressure

front: 190 kPa / 1.9 bar / 28 psi
rear: 220 kPa / 2.2 bar / 32 psi

Weight

140 kg dry
167 kg fully tanked

Max load

160 kg

Fuel tank capacity

19.5 litres (including reserve 3.6 litres)

Coolant

1.9 litres (50 % water + 50 % anti-freeze)

Rake

25° 30'

Trail

102 mm

Dimensions

maximum length 1975 mm.
maximum width 690 mm.
maximum height 1180 mm.
wheel base 1360 mm.
seat height 810 mm.
min. ground clearance 135 mm.


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