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1957 Ariel 4G Mk II


1957 Ariel 4G Mk II Pictures
The Square Four originally had only two exhaust pipes.
The Square Four originally had only two exhaust pipes.

The engine of the 1957 Ariel 4G Mk II motorcycle used the "square four" design, which consisted of two crankshafts geared together and four cylinders arranged in a square pattern, with a pair of pistons tied to each crankshaft.

Instruments were at the top of the headlight nacelle.
Instruments were at the top of the headlight nacelle.
The 4G Mk II featured a plunger-type rear suspension.
The 4G Mk II featured a plunger-type rear suspension.

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