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The 1953 BSA M33 and 1955 BSA B33 represent two chapters in BSA's storied history.
The 1953 BSA M33 from United Kingdom was powered by a 499cc OHV single producing 23hp at 5500rpm. Weighing 175.0kg (386 lbs) and with a seat height of 780mm, it was aimed at standard riders.
The 1955 BSA B33 by contrast offered 499cc of OHV single power, delivering 23hp at 5500rpm. Tipping the scales at 170.0kg (375 lbs) with a top speed of 130km/h (81 mph), it offered a distinct riding experience. 1950s bikes represent the golden age of British motorcycling and early Japanese innovation, with well-maintained examples commanding premium prices.
The 1953 BSA M33 from United Kingdom was powered by a 499cc OHV single producing 23hp at 5500rpm. Weighing 175.0kg (386 lbs) and with a seat height of 780mm, it was aimed at standard riders.
The 1955 BSA B33 by contrast offered 499cc of OHV single power, delivering 23hp at 5500rpm. Tipping the scales at 170.0kg (375 lbs) with a top speed of 130km/h (81 mph), it offered a distinct riding experience. 1950s bikes represent the golden age of British motorcycling and early Japanese innovation, with well-maintained examples commanding premium prices.
Specifications Comparison
| 1953 BSA M33 | 1955 BSA B33 | |
|---|---|---|
| Displacement | 499 cc | 499 cc |
| Power | 23 hp | 23 hp |
| Torque | 35.0 Nm | 35.0 Nm |
| Cylinders | 1 | 1 |
| Top Speed | 130 km/h | 130 km/h |
| Quarter Mile | — | — |
| Dry Weight | 175.0 kg | 170.0 kg |
| Wet Weight | 187.0 kg | 183.0 kg |
| Seat Height | 780 mm | 780 mm |
| Wheelbase | 1370 mm | 1370 mm |
| Fuel Capacity | 14.0 L | 14.0 L |
| Gears | 4 -speed | 4 -speed |
The Verdict
Comparing these two BSA machines reveals the brand's evolution. The 1953 BSA M33 laid the groundwork with 23hp, while the later 1955 BSA B33 pushed output to 23hp. Both share equal collector appeal at 5/10. Either way, both are worthy additions to any BSA collection.
About the 1953 BSA M33
Introduced in 1953, the 1953 BSA M33 features a 499cc OHV single engine producing 23hp, establishing itself as a notable standard motorcycle.
Full 1953 BSA M33 Profile →About the 1955 BSA B33
The 1955 1955 BSA B33 is a 499cc single-cylinder standard motorcycle that became one of BSA's most memorable motorcycles of the 1950s.
Full 1955 BSA B33 Profile →