Interesting Facts About the BSA A50
The BSA A50 is a 500cc twin-cylinder motorcycle that was introduced in 1962 alongside its larger sibling, the A65. Although it is a 500cc machine, it is considered a full-size bike because it utilizes the chassis of the 650cc A65.
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Shared DNA with the A65
The BSA A50 and the 650cc A65 were introduced together in 1962 and share many components and design features. They both utilize a 74 mm bore, highlighting their close mechanical relationship.
The 'A58' Conversion
Enthusiasts can transform an A50 into an 'A58' by swapping specific engine parts. This process involves replacing the pistons, cylinder barrel, pushrods, and cylinder head with the corresponding components from an A65 engine.
Full-Size 500cc Design
Unlike some other 500cc motorcycles, the BSA A50 Royal Star is a full-size machine. It achieves this status by utilizing the chassis of the larger A65 model, giving it a substantial presence on the road.
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BSA A50 Parts
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Last updated: 09.11.2026, 20:18
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