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General information |
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Model
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BSA M 21 |
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Year model
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1953 |
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Type
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Allround |
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Rating
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Engine and transmission |
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Engine size
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591.0 ccm (36.06 cubic inches) |
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Type of engine
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Single cylinder, four-stroke |
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Effect
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15.0 HP (10.9 kW)) @ 4000 RPM |
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Bore x stroke
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82.0 x 112.0 mm (3.2 x 4.4 inches) |
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Fuel system
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Carburettor |
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Fuel control
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Sidevalves |
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Ignition
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Magneto |
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Transmission type
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Chain (final drive) |
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Clutch
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Wet multiplate |
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Chassis, suspension, brakes and wheels |
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Frame type
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Single cradle |
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Front suspension
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Hydraulic telescopic |
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Rear suspension
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Twin shock |
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Front tire
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3.25-19 |
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Rear tire
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3.25-19 |
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Front brakes
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Expanding brake (drum brake) |
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Rear brakes
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Expanding brake (drum brake) |
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Wheels
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Spoked |
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Seat
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Dual |
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Physical measures and capacities |
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Dry weight
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180.0 kg (396.8 pounds) |
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Power/weight ratio
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0.0833 HP/kg |
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Fuel capacity
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11.36 litres (3.00 US gallons) |
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Other specifications |
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Starter
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Kick |
| Update specs | Report missing specs or required updates. |
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Further information |
| Maintenance | Find parts, fluids. filters, maintenance tools and service manuals at Amazon.com. |
| Ask questions | Join the 53 BSA M 21 discussion group or the general BSA discussion group. |
| Related bikes | List related bikes for comparison of specs. |
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Compare with another motorcycle |
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and veteran bikes can be sold and bought through our free motorcycle classifieds.
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Pictures, trademarks and logos of third parties are the exclusive
property of the respective owners. Technical specifications are subject to change without notice.
