1959-65 ARIEL LEADER / ARROW SPECIFICATIONS
       
Engine: air cooled 2 stroke twin
        247cc
        bore:54mm, stroke: 54mm
        loop scavenged, alloy pistons
        output (Leader) 16 BHP @ 6400 rpm
               (Arrow) 20 BHP @ 6800 rpm  
Lubrication: 25:1 petroil mixture.
Gearbox: 4 speed 
Max speed: (Leader) 68 mph - 109kmph
           (Arrow)  80 mph
Dimensions: seat height:      760mm
            width:               mm
            length:              mm
            Wheelbase:       1300mm
            Weight:          150kgs
Frame: pressed steel.
Rear suspension: trailing swingarm with hydraulic shock absorbers.
Front suspension: trailing links with built in hydraulic shock absorbers.
Electrical: 6 volt 
            6 volt 6 amp hour battery.
            35/35 watt dual beam headlight 160mm diam.
            5 watt stop light, 3 watt tail lamp
            Electric horn.
Enclosed rear chain 5/8" x 1/4" links with 10.1mm diam. rollers
Twin downswept silencers with removable centres for cleaning.