BSA A10 golden Flash (1949-61)

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.

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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