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1955 BSA M 21 specifications, pictures, reviews and rating
1955 BSA M 21. Picture credits - BSA. Submit more pictures.
|Model||BSA M 21|
|Rating||Do you know this bike?|
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|Engine and transmission|
|Displacement||591.0 ccm (36.06 cubic inches)|
|Engine type||Single cylinder, four-stroke|
|Power||15.0 HP (10.9 kW)) @ 4000 RPM|
|Bore x stroke||82.0 x 112.0 mm (3.2 x 4.4 inches)|
|Transmission type||Chain (final drive)|
|Chassis, suspension, brakes and wheels|
|Frame type||Single cradle|
|Front suspension||Hydraulic telescopic|
|Rear suspension||Twin shock|
|Front brakes||Expanding brake (drum brake)|
|Rear brakes||Expanding brake (drum brake)|
|Physical measures and capacities|
|Fuel capacity||11.36 litres (3.00 US gallons)|
|Update specs||Report missing specs or required updates.|
|Maintenance||Find parts, fluids. filters, maintenance tools and service manuals at Amazon.com.|
|Ask questions||Join the 55 BSA M 21 discussion group or the general BSA discussion group.|
|Related bikes||List related bikes for comparison of specs.|
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