1955-56 ADLER RS250 SPECIFICATIONS
       
Engine: water cooled 2 stroke twin
        247cc
        bore:54mm, stroke: 54mm
        loop scavenged, 2 ringed alloy pistons
        compression ?:1
        Twin 28mm Amal TT carburetors
        multi-plate clutch in oil bath
        twin ignition coils
        output 28 to 40 HP DIN eg 32HP @ 8500 rpm 
Lubrication: 40:1 petroil mixture.
Gearbox: 4 speed with neutral indicator
         oil capacity: 1.2 litres
         foot operated lever on LHS
         bottom=neutral, up = low-2nd-3rd-top.
         low gear = 2.80:1
         2nd gear = 1.53:1
         3rd gear = 1.11:1
         top gear = 0.81:1
         primary drive = 3.44:1
         final drive = various 
Max speed: 225 kmph 
Dimensions: height:     935 mm
            width:      620 mm
            length:    1975 mm
            Wheelbase: 1260 mm
            Weight:     80 to 100 kgs
Wheels: 3.00 x 18" alloy rims.
        Large diameter alloy hubs.
Brakes: 180mm diam x 30mm wide twin shoes.
Tyres:  3.25x18, front:    15.5 psi
                 rear :    20 psi
Fuel tank: aluminium rubber mounted 20 litres.
Rear suspension: swing arm with telescopic 
                 hydraulic shock absorbers.
Front suspension: anti-dive swinging leading links with
                  built in hydraulic shock absorbers.
Electrical: 6 volt 60 watt dynamo, voltage regulated,
            6 volt 6 amp hour battery.
            1.5 watt ignition warning,
Adjustable steering damper.
Twin expansion chambers.