1953-4 ADLER RS250 SPECIFICATIONS
       
Engine: air cooled (large finned heads) 2 stroke twin
        247cc
        bore:54mm, stroke: 54mm
        loop scavenged, 2 ring alloy pistons
        compression 8.5:1
        Twin 24mm Amal TT carburetors
        multi-plate clutch in oil bath
        Bosch magneto ignition        
		spark plugs 225 to 260 heat range
        electrode gap: 0.6 - 0.7mm
        output 24 HP DIN @ 6400 rpm
Lubrication: 25:1 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 = 2.0:1 
Max speed: 192 kmph 
Dimensions: height:     935 mm
            width:      620 mm
            length:    1975 mm
            Wheelbase: 1260 mm
            Weight:     110 kgs
Wheels: 1.85"x16" alloy rims with 36 butted spokes and fully floating axles.
        Large diameter alloy hubs.
Brakes: 180mm diam x 30mm wide twin shoes.
Tyres:  3.25x16, 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.
Adjustable steering damper.
Enclosed rear chain 5/8" x 1/4" links with 10.1mm diam. rollers
Twin expansion chamber exhausts.