Property of a deceased's estate,c.1946 Norton 490cc Manx Racing Motorcycle Frame no. 15876 (see text) Engine no. E11M 31772
Lot 314
Property of a deceased's estate,c.1946 Norton 490cc Manx Racing Motorcycle
Registration no. VSV 907 Frame no. 15876 (see text) Engine no. E11M 31772
Sold for £14,950 (US$ 20,085) inc. premium

Lot Details
Property of a deceased's estate,c.1946 Norton 490cc Manx Racing Motorcycle Frame no. 15876 (see text) Engine no. E11M 31772 Property of a deceased's estate,c.1946 Norton 490cc Manx Racing Motorcycle Frame no. 15876 (see text) Engine no. E11M 31772 Property of a deceased's estate,c.1946 Norton 490cc Manx Racing Motorcycle Frame no. 15876 (see text) Engine no. E11M 31772
Property of a deceased's estate
c.1946 Norton 490cc Manx Racing Motorcycle
Registration no. VSV 907
Frame no. 15876 (see text)
Engine no. E11M 31772
Dubbed 'Manx Grand Prix' in 1939, what would become the best-known racing motorcycle of all time had become simply 'Manx' when production resumed in 1946. Norton's over-the-counter Manx racers were much the same as their pre-war counterparts, with single-overhead-camshaft engine, 'square' cylinder head finning, upright gearbox and plunger-suspended 'garden gate' frames. Only the presence of the Roadholder telescopic front fork readily distinguished them from the '39 machines. 1949 brought the first significant change in engine specification, the Manx gaining a double-overhead-camshaft 'head like that enjoyed by the works bikes for many years, but the major development was the arrival of the Featherbed frame for 1951. The works' adoption of the McCandless-designed duplex-loop swinging-arm chassis the previous year had given the Nortons a new lease of life in Grand Prix racing, and Geoff Duke duly took both the 350 and 500cc world titles in 1951. The cycle parts remained essentially unchanged from then on apart from the adoption of a double-sided, twin-leading-shoe front brake for 1962. Manx engine development though, continued steadily, latterly under Doug Hele's direction, until production ceased at the end of '62, among the most significant design changes being the adoption of 'square' bore and stroke dimensions for 1954 and coarser-pitch bevel teeth in 1957.

This 'garden gate' Manx was registered by the late owner with its current number on 21st April 1987. We are advised that the engine has been fully rebuilt with new main and big-end bearings, new Carrillo con-rod, and new piston valves and guides. The accompanying history file contains a quantity of MoT certificates (most recent expired August 2013), SORN paperwork, technical drawings, an original maintenance manual, technical drawings, assorted Manx-related literature and old/current V5/V5C registration documents. It should be noted that the frame has been stamped in three different locations with numbers of varying clarity. With corresponding approximate manufacturing dates (in brackets) they are: '13166' (1947), '15876' (1948) and '40M 5536' (1945), the last two being recorded as the VIN number in the V5C. If genuine, the '40M' stamping indicates this motorcycle was built as a Model 40 (350cc) Manx, while the engine number 'E11M 31772' indicates that this engine is a 490cc (Model 30) unit dating from 1950.
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