BSA Beagle



Make Model

BSA Beagle (Starlite in North America)


1963 - 66


Four stroke, single cylinder, OHV, 2 valve


74.8 cc / 4.6 cub in.
Cooling System Air cooled
Compression Ratio 9.5:1
Lubrication Wet sump
Exhaust Single, chrome plated
Starting Kick

Max Power

4.0 kW / 5.5 hp @ 5200 rpm

Max Power at Rear Wheel

3.6 kW /4.9 hp @ 5200 rpm
Clutch Multi-plate, wet, cable operated


4 Speed
Final Drive Chain

Dry Weight

65.8 kg / 145 lbs

Fuel Consumption

2.3 L/100 km / 44.3 km/l / 104 US mpg

Top Speed

79 km/h / 49 mph


The BSA Beagle was only in production for 18 months. They are quite rare now, and the remaining examples to be found are invariably low-mileage examples.

Though influenced by Edward Turner (famous for the Ariel Square Four and Triumph Speed Twin), it had been rushed out by BSA to try and compete in a market they were losing to imports. Italian lightweight motorcycles had excellent reputations and the revolutionary Honda 4 stroke mopeds had just started to arrive. But, with inherent engine problems, most Beagles soon ended up back in the shops that had sold them.

The Beagle had roller main bearings, geared primary drive and a four speed gearbox, but a weak top end let it down, along with its many oil leaks. Handling was poor, and if worked hard the engines would often give up at well under 10,000 miles.