A 50 Royal Star
1967 BSA A 50 Royal Star Technical Analysis & Specification Breakdown
Positioned in BSA's naked motorcycle lineup, the 1967 BSA A 50 Royal Star utilizes a 500 cc (30.5 cu in) air-cooled twin, four-stroke layout. In factory specification, peak output is rated at 33 HP (24.1 kW) at 5,800 rpm, transferring power to the rear wheel through chain final drive. With a specific output of 66 HP per liter, the engine character is indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.
Rider ergonomics and chassis geometry center around a 1,391 mm (54.8 in) wheelbase engineered for quick, flickable steering geometry. The 18-liter (4.8 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's BSA archive, this model family spans 8 indexed model years from 1963 to 1970, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
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