Make Model: BSA Golden Flash
Year: 1949 – 61
Engine: Four stroke, parallel twin cylinder, OHV
Capacity: 646 cc / 39.4 cub in.
Bore x Stroke: 70 x 84 mm
Cooling System: Air cooled
Compression Ratio: 7.2:1
Lubrication: Dry sump
Exhaust: Twin, stainless steel
Ignition: Lucas magdyno
Starting: Kick start
Max Power: 26 kW / 35 hp @ 4500 rpm
Clutch: Multi-plate with bult-in cush drive
Transmission: 4 Speed
Final Drive: Chain
Gear Ratio: 1st 11.68 / 2nd 7.96 / 3rd 5.48 / 4th 4.53:1
Frame: Welded seamless steel tubing with duplex downtubes and full cradle engine support, bolted-on rear sub frame
Front Suspension: Telescopic forks with coil spring – hydraulically damped
Rear Suspension: None or Plunger-type, with shock and rebound springs, undamped. From 1954: Swinging arm
Front Brakes: Drum, 8 in.
Rear Brakes: Drum, 7 in.
Wheels: Steel, wire spokes
Front Tyre: 3.25 x 19 in., ribbed
Rear Tyre: 4.00 x 19 in.
Dimensions: Length: 2100 mm / 84.0 in.
Wheelbase: 1391 mm / 54.75 in.
Dry Weight: 170 kg / 375 lbs
Fuel Capacity: 16 L / 4.2 US gal
Top Speed: 160 km/h / 100 mph
Standing Quarter Mile (400 m): 16 sec.
Colours: All over gold, Black/chrome
Source: Wikipedia, Two Wheels Magazine