BSA A50 Cyclone (1962-70)

Make Model: BSA A50 Cyclone/Royal Star


Year: 1962 – 70
Engine: Four stroke, twin cylinder
Capacity: 498 cc / 30.4 cub in.
Bore x Stroke: 65,5 x 74 mm
Cooling System: Air cooled
Compression Ratio: 9.0:1
Lubrication: Dry sump
Oil Capacity: 3 L / 6.3 US pints
Carburetors: Dual, 1 1/16 in carburetors
Exhaust: Twin, stainless steel
Ignition: Coil
Spark Plug: Champion N4, 0.025 in. gap
Starting: Kick start
Max Power: 24.3 kW / 33 hp @ 5800 rpm
Clutch: Multi-plate
Transmission: 4-Speed
Final Drive: Chain
Frame: Tubular pipe, welded, double cradle with swingarm
Front Suspension: Telescopic forks
Rear Suspension: Double coil over
Front Brakes: Drum, 8 in.

Rear Brakes: Drum, 7 in.
Wheels: Steel, wire spoke
Front Tyre: 3.25 x 19 in., ribbed
Rear Tyre: 4.00 x 18 in. K70
Dimensions: Length: 2100 mm / 81 in. Height: Western: 1117 mm / 44 in. / Standard: 1028 mm / 40.5 in
Wheelbase: 1391 mm / 54.8 in.
Seat Height: 840 mm / 33 in.
Dry Weight: 141 kg / 311 lbs
Wet Weight: 177 kg / 391 lbs (4 gal tank)
Fuel Capacity: 18.2 L / 4.0 Imp gal 7.57 L / 2 US gal


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