Ariel Huntmaster

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1958 Ariel FH650 Huntmaster

In 1944 the firm was sold to BSA. After the sale, Ariel built two types of twins, the softly-tuned 500cc KH, which debuted in 1949 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 Huntmaster however was it's own bike with a completely different frame from the A10. The Huntmaster was particularly popular with sidecar fanatics in the late 1950s.

Ariel Huntmaster
Also called FH650, FH 650, KH500 Huntmaster, KH 500 Huntmaster, FH650 Huntmaster, FH 650 Huntmaster, FH650 Huntmaster Twin, FH 650 Huntmaster Twin
Production 1950 - 1958
Class Classic
twin, four-stroke
Bore / Stroke 70.0mm x 84.0mm
Compression ratio 7.5:1
Top Speed 92 mph (148 km/h)
Horsepower 34.2 HP (25.5 KW) @ 5600RPM
Ignition magneto
Transmission Gear box: 4-speed

Final Drive: chain

Clutch: dry plate
Suspension Front: telescopic fork, hydraulic
Rear: dual coil springs
Brakes Front: expanding brake (drum brake)
Rear: expanding brake (drum brake)
Front Tire 3.25-19
Rear Tire 3.50-19
Wheelbase 55.98 inches (1422 mm)
Length 85.98 inches (2184 mm)
Width 25.2 inches (640 mm)
Seat Height 30.98 inches (787 mm)
Weight 399.04 pounds (181.0 Kg) (dry), 186.0 kg (wet)
Oil Capacity 0.61 Gallon (2.30 Liters)
Fuel Capacity 3.96 Gallon (15.00 Liters)
Fuel Consumption 5.10 liters/100 km (19.6 km/l or 46.12 mpg)
Manuals Service Manual

The Ariel FH650 Huntmaster Twin was a twin, four-stroke Classic motorcycle produced by Ariel between 1950 and 1958. It could reach a top speed of 92 mph (148 km/h). Claimed horsepower was 34.2 HP (25.5 KW) @ 5600 RPM.


The engine was a air cooled twin, four-stroke. A 70.0mm bore x 84.0mm stroke result in a displacement of just 646.0 cubic centimeters. Fuel was supplied via a overhead valves (ohv).


The bike has a 4-speed transmission. Power was moderated via the dry plate.


It came with a 3.25-19 front tire and a 3.50-19 rear tire. Stopping was achieved via expanding brake (drum brake) in the front and a expanding brake (drum brake) in the rear. The front suspension was a telescopic fork, hydraulic while the rear was equipped with a dual coil springs. The FH650 Huntmaster Twin was fitted with a 3.96 Gallon (15.00 Liters) fuel tank. The bike weighed just 399.04 pounds (181.0 Kg). The wheelbase was 55.98 inches (1422 mm) long.

1950 Ariel Huntmaster[edit]

1950 Ariel Huntmaster

In 1944, after being sold to BSA, Ariel built the 500cc KH, which made its entrance in 1949 and the popular Huntmaster, powered by a slightly different version of the 650cc engine taken from BSA's A10. The Huntmaster had a great success because of its sidecar, which was added in 1950.

In Media[edit]