Lot 321 - 1960 AJS Model 31 De Luxe (646cc)

Lot 321 - 1960 AJS Model 31 De Luxe (646cc)

Lot 321 - 1960 AJS Model 31 De Luxe (646cc)

Lot Number 321
Registration YYH 55
Chassis Number A74018
Engine Number 60/31L 3044
Estimate £3,000 - £4,000
Result Sold - £3,584

The AJS Model 31 was made by Associated Motorcycles at the former Matchless works in Plumstead, London. Developed in 1958 specifically to capture the potentially lucrative US market, the last Model 31 was produced in 1966. The AJS Model 31 was designed by Phil Walker, AMC knew that it had to be a 650cc but wanted to use as many cycle parts from the Model 11 as possible. The cylinders could not be bored out further so the stroke was lengthened from 72.8mm to 79.3mm resulting in a capacity of 646cc. The meant developing a new crankshaft and primary chain case which also provided the opportunity to add a Lucas alternator. In 1959 the Model 31 was redesigned and modernised as the De Luxe with a new full cradle tubular duplex frame and a new cylinder head. Vibration had always been a problem so the crankshaft was upgraded to nodular iron. Capable of 100mph performance, the AJS Model 31 became popular with the American market.

The AJS presented here left the factory on the 10th March, 1960 with a gearbox number of 26536. It has a matching frame and engine and is in good order throughout.  Whilst requiring some light re-commissioning, this AJS is tidy and, until recently, had been run up to temperature on a regular basis. Supplied with a registration document this motorcycle is a particularly handsome machine.

Interested parties should satisfy themselves as to the description and condition of each lot prior to the sale. Buyers are advised to inspect the car in person or use a professional to carry out this service.

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