The BSA Golden Flash is a four-stroke, parallel twin cylinder motorcycle that was manufactured from 1949 to 1961. It has a 646cc engine with a bore x stroke of 70 x 84mm and a compression ratio of 7.2:1. The motorcycle has a dry-sump lubrication system, twin stainless steel exhausts, a Lucas magdyno ignition, and a 6V battery. The Golden Flash has a kick start and a maximum power output of 35 hp at 4500 rpm. The motorcycle has a multi-plate clutch with a built-in cush drive and a four-speed transmission with a final chain drive. It has a frame made of welded seamless steel tubing with duplex downtubes and full cradle engine support and a bolted-on rear subframe.
The BSA Golden Flash has telescopic forks with coil spring and hydraulic damping at the front, and either a plunger-type or swinging arm suspension with shock and rebound springs (undamped) at the back. The motorcycle has drum brakes at the front and rear, steel wire-spoked wheels, 3.25 x 19-inch ribbed front tires, and 4.00 x 19-inch rear tires. It has a length of 2100 mm, a wheelbase of 1391 mm, and a dry weight of 170 kg. The fuel tank can hold up to 16 liters of fuel, and the motorcycle has a top speed of 160 km/h and can complete the standing quarter mile (400 m) in 16 seconds. The BSA Golden Flash is available in all-over gold, black/chrome colors. It is a classic motorcycle that is still in demand among vintage motorcycle enthusiasts.
Technical specifications:
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 |
| Carburetor | Amal |
| Cooling System | Air cooled |
| Compression Ratio | 7.2:1 |
| Lubrication | Dry sump |
| Exhaust | Twin, stainless steel |
| Ignition | Lucas magdyno |
| Battery | 6V |
| 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 |
