1953 BSA Gold Star

1953 BSA GOLD STAR BACKGROUND
Throughout the 1930s, BSA created and developed a strong line of single-cylinder motorcycles. In 1937, they introduced the 500cc Empire Star. When Wal Handley lapped the Brooklands racetrack at over 100 mph average speed, he was awarded a Gold Star. The name stuck and was applied to the new high-performance variant, the 1938 BSA Gold Star in both 350cc and 500cc form. The engines were hand-built to the highest standard. The BSA factory offered several performance modifications as options. Every bike was run on a dyno, and came from the factory with a printout of its dynamometer results showing the actual horsepower that the engine produced. The BSA Gold Star was one of the fastest production motorcycles on the planet at the time. 1939 was the last year of civilian production prior to World War II. These early pre-war bikes had rigid frames and girder front forks.

1953 BSA GOLD STAR DESIGN
The 1953 BSA Gold Star came in two sizes, 350cc (the BB32) and 500cc (the BB34). The hand-assembled engines were based on the same design, but with different bores and strokes. Changing over to an aluminum cylinder and head from cast iron after the war saved some 20 pounds and improved cooling. Constant and continuous development and refinement improved nearly every part of the bikes. However, the big news for the 1953 BSA Gold Star was the adoption, finally, of a new frame with a swing-arm rear suspension. Of course, much more had to be changed to accommodate the new frame and running gear.


1953 BSA Gold Star SPECIFICATIONS


Engine type

Displacement

Bore & Stroke

Compression

Carburetor

Horsepower

Primary Drive

Clutch

Gearbox type

Ratios, overall

1st Gear, Low

2nd Gear

3rd Gear

4th Gear, Top

Final Drive

Frame

Wheelbase

Ground clearance

Seat height

Dry weight

Suspension, F

Suspension, R

Brakes, F

Brakes, R

Wheels, F

Tires, F

Wheels, R

Tires, R

Fuel capacity

Oil Tank cap.

BB32 350                  

Air-cooled OHV single

348cc

71mm X 88mm

8.75:1

Amal GP


1/2" X .305" chain

Multi-plate, dry

4-speed, foot-shift


10.15:1

7.0:1

5.8:1

5.28:1

5/8" X 1/4" chain

All-welded steel duplex

54.75"

5"

30.5" unladen

380 lbs, dry

Telescopic, hydraulic

Swing arm, 2 shocks

8" drum, SLS

7" drum, SLS

WM1-19 (19")

Dunlop 3.25" X 19"

WM1-19 (19")

Dunlop 3.25" X 19"

4 gal

3 pints

BB34 500                    

Air-cooled OHV single

499cc

85mm X 88mm

8.0:1

Amal GP

38hp @ 7,000rpm

1/2" X .305" chain

Multi-plate, dry

4-speed, foot-shift


8.71:1

5.99:1

4.96:1

4.52:1

5/8" X 1/4" chain

All-welded steel duplex

54"

5"

30.5" unladen

383 lbs, dry

Telescopic, hydraulic

Swing Arm, 2 Shocks

8" drum, SLS

7" drum, SLS

WM1-21 (21")

Dunlop 3.00" X 21"

WM1-19 (19")

Dunlop 3.25" X 19"

4 gal

3 pints



MORE BSA PAGES:
BSA Motorcycles
..... BSA Gold Star
..........1939
..........1953
..........1954
..........1961
..........1962
..... BSA A7 (pre-unit 500)
..........1952
..........1955
..... BSA A10 (pre-unit 650)
..........1951
..........1954
..........1957
..........1958
..... BSA A65 (unit-construction 650)
..........1962
..........1963
..........1964
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Check out these BSA BOOKS





BSA Motorcycles: The Final Evolution



The BSA Gold Star: Motorcycle History



Illustrated Bsa Buyer's Guide (Motorbooks International Illustrated Buyer's Guide)



Bsa Twin Restoration



BSA Unit Singles: The Complete Story including the Triumph Derivatives



Bsa Motor Cycles: Since 1950 (British Motor cycles since 1950)



BSA Unit Twins



BSA 500 & 650 Twins: The Essential Buyer's Guide



Triumph and Bsa Triples



How to Restore Triumph Trident T150/T160 & BSA Rocket III: YOUR step-by-step colour illustrated guide to complete restoration (Enthusiast's Restoration Manual)




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11/21/17

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