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Lot 373: 1954 AJS 349cc 7R Racing Motorcycle

Sale of Collectors' Motorcycles, Bonhams & Butterfields (12 November 2005)

Built from 1948 to 1963, Associated Motor Cycles’ AJS 7R - known affectionately as the ‘Boy Racer’ - was one of the most successful over-the-counter racing motorcycles of all time. While initially not as powerful as the Velocette KTT and Junior Manx Norton, the 7R’s robust and simple construction endeared it to the privateer responsible for his own maintenance. The duplex loop frame and Teledraulic front fork remained essentially unchanged throughout production but the engine underwent almost continuous revision, the valve angle being progressively narrowed, the crankshaft made stronger and, in 1956, the engine dimensions changing from the original long-stroke 74x90mm to the ‘squarer’ 75.5x78mm. AMC’s own gearbox replaced the previous Burman in 1958, and engine development continued almost to the end, by which time the 7R was putting out around 41bhp. Today the AJS 7R remains a mainstay classic racing’s 350cc class and is highly sought after by competitors and collectors alike.

The vendor describes this dismantled example as ‘complete’ apart from a missing swinging arm, rear wheel rim, piston, roller rockers and spindles, valve collets and one valve spring retainer. We are advised that the engine bottom end and gearbox have been completely rebuilt with new bearings throughout by a qualified motorcycle mechanic and ex-racer. Other engine internals are reported as present and correct, and the magneto has been overhauled. However, prospective purchasers are strongly advised to satisfy themselves, prior to bidding, with regard to the extent of the correctness, originality and completeness of the machine, which is sold strictly as viewed.

Lot Details
Auction Sale of Collectors' Motorcycles
Bonhams & Butterfields, Petersen Museum, Los Angeles, CA
TypeMotorcycle
Lot Number373
Estimate$10000-$20000
Outcome SOLD
Hammer Price$15000
Hammer Price (inc premium)$17250
Year1954
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Mileage-
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