Lot details Registration No: Un-Reg Frame No: 3734 Engine No: T.B.A. cc: 350 MOT Expiry Date: Exempt
Undoubtedly one of the great British sporting motorcycles, the KTT (Kamshaft Tourist Trophy) enjoyed a career spanning three decades having first become available to the public at the end of 1928, when two MK I's were built. Production of the new model accelerated in 1929 when 178 were produced. As the name implies, the KTT was a production racer offered to the public. The model benefited from the experience gained by the successful works team, being in effect a replica of the works machines that had secured Velocette's second TT win in the 1928 Junior race. The new model was powered by an overhead cam single cylinder engine displacing 348cc with a bore and stroke of 74 x 81 mm that could be distinguished from the road going models in the range by the external stiffening webs employed on the crankcase. Lighter, steel flywheels were employed and a hotter camshaft was fitted. A great deal of attention was paid to strengthening the valve train to prevent breakages and a revised cylinder head was fitted. Drive was taken to a three speed gearbox, similar to that employed by the rest of the range but fitted with a set of close ratio gears, via a primary chain. The rigid frame was equipped with a set of braced Webb girder forks, a feature peculiar to the KTT.
This machine employs a Mk 1 KTT engine housed in a contemporary KSS frame which was identical to the KTT unit, and is complete, except for a missing front brake plate. It is offered in unrestored condition. Prior to entering the museum it was campaigned in vintage racing events where, according to the owner, it proved to be "very fast" but would "benefit from a set of strutted forks".
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