In 1944 the company was sold to BSA. After that, Ariel built two types of twins: the softly-tuned 500cc KH, which debuted in 1949 and was selling poorly, and the more powerful and successful Huntmaster, which was powered by a modified version of the 650cc engine from BSA's A10. The Ariel Huntmaster FH 650 was particularly popular with sidecar fanatics in the late 1950s.
Ariel Huntmaster FH650 specifications
Engine: Vertical OHV 646cc (70x84 mm)
Cast iron cylinders and heads.
Forged steel crankshaft mounted on heavy duty roller and white metal lined bearings.
Light alloy connecting rods with lead-bronze liners.
Gear driven camshaft.
Push rod operated over-head valves.
Mechanical crankcase breather.
Magneto with automatics advance.
Amal `Monobloc` carburettor with air cleaner.
Frame: Duplex cradle type, fully triangulated, ensuring great rigidity.
Swinging arm rear suspension.
Rubber bushed pivots.
Lugs for sidecar attachment either side.
Thief-proof steering lock.
Stands: easy-lift spring-up central and strong tubular front, also prop stand.
Chassis and dimensions
Front Forks:Telescopic with hydraulic damping.
Attractive headlamp hood and fork cover with built-in illuminated instrument panel, containing speedometer, ammeter and lighting switch.
Hubs: Full width light alloy fitted with heavy duty ball bearings front and rear.
Powerful central brakes with non-fade linings. Car type fulcrum adjustment. New quickly detachable rear wheel.
Transmission: Four-speed gearbox, foot control.
Engine shaft shock absorber.
Polished aluminium oil bath primary chain case.
Rear chain fully protected and lubricated.
Handlebars and Controls: Adjustable, chromium plated, 7/8 in. diameter.
Petrol Tank: Rubber mounted, enamelled and lined with chromium plated motifs.
Equipment: Ariel design dualseat and pillion footrests.
Trip speedometer 120mph.
7 in. headlamp. 56 watt dynamo. 12 amp.
Battery. Stop and tail lamp.
Reflector. Electric horn.
Tool box and tools. Tyre inflator.