1958 Ariel Model 4G MkII Square Four, 995cc. Registration nu...

Estimate

£8,000 - £10,000

1958 Ariel Model 4G MkII Square Four, 995cc. Registration number DSK 431 (see text). Frame number CGM 1820. Engine number CNML 1764.

The Square Four is a motorcycle produced by Ariel between 1931 and 1959, designed by Edward Turner, who devised the Square Four engine in 1928.

The first Square Four 4F was shown at the Olympia Motorcycle Show in 1930, in chain driven overhead-camshaft 500 cc form. Early Square Fours used a hand-change, four-speed Burman gearbox. In 1932, the cylinder bores were enlarged by 5 mm to give a capacity of 601 cc, specifically to accommodate owners who wanted a sidecar.
The "Cammy" engine gained a reputation for overheating the rear cylinder heads, so in 1936 the engine was completely redesigned, emerging as the OHV 995 cc model 4G, Mk I.
In 1953, the 'four pipe' 997 cc Mk II was released, with separate barrels, a re-designed cylinder head with four separate exhaust pipes from two cast-aluminium manifolds and a rocker-box combined with the inlet manifold. Square Four production, along with that of all other Ariel four-strokes, ceased in 1959.

DSK is recorded with DVLA as being first registered in 1990 and being used overseas. The 2003 dating certificate shows it as matching numbers, being dispatched to Chas Cope and Sons Ltd of Birmingham on the 28th January 1959. Our vendor bought it during lockdown as he had always hankered after one and now finds he prefers his other bikes.
Started with ease when delivered, the engine soon settles to a lovely note and the machine is in wonderful condition.

Sold with the V5C, dating certificate and Model 4G owners guide.