Aprilia RS 250

Engine Type:

Two-stroke, two-cylinder 90° V formation, liquid cooled lamellar intake in casing. Sequential two-stage valve in the exhaust, electronically managed by Digital Control Unit and controlled by a ‘step-by-step’ motor.

Pistons:
Special alloy with high silicon content.

Bore and Stroke:
56 mm x 50.6 mm.

Displacement:
249 cc.

Compression Ration:
13.2 : 1

Carburetors:
Mikuni TM 34 SS with flat valve, with electronic management by electro valves that section the maximum air passages and the idling circuits.

Ignition:
CDI digital, with advance mapping programmed on three parameters (opening of carburetors valves, opening speed, engine running speed).

Start-up:
Kick starter.

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

Clutch:
Multiple discs in oil bath.

Frame:
Inclined double beam in an alloy of aluminum and magnesium, with thin wall shell structure. Sleeve and side plates cast in an alloy of aluminum and magnesium.

Front Suspension:
Fork with upside-down rods in high resistance steel, Ø 40 mm, with adjustable extension and compression. Wheel bump position 120 mm.

Rear Suspension:
Swinging rear fork in alloy of aluminum and magnesium, with arms with differentiated design. Single shock-absorber with separate tank, adjustable extension, compression and spring preloading. Wheel bump position 130 mm.

Front Brakes:
Double floating disc, Ø 298 mm, caliper with 4 positions with differentiated diameter.

Rear Brake:
Single disc, Ø 220 mm.

Rims:
Aluminum alloy, with 5 tangential spokes. (Front: 3.00 x 17", Rear: 4.50 x 17")

Tyres:
Radial tubeless; front: 110/70 ZR 17"; rear: 150/60 ZR 17"

Fuel Capacity:
16.5 litres (Reserve: 3 litres)

Source:
http://www.geocities.com

Photo:
www.vsource.org