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1934 Excelsior 246cc Road Racer - 'The Mechanical Marvel'

1934 Excelsior 246cc Road Racer - 'The Mechanical Marvel'

The 1934 model of the "Mechanical Marvel" looks very much like the 1933 one. In fact,they were the same machines lightened by much drilling of holes and filigree work on parta like their gear change lever and exhaust brackets. The only significant change was the switch from Amal to Bowden carburettors. One feature of the engine was the very steep downdraught of the induction tracts, good for gas flow but it may have provided carburation problems. Presumably the Bowden instruments had been found to perform better at the acute angle, though the float chambers, being part of structure, could not be mounted horizontally as with the Amal. The factory does not seem to have found any more power or gained reliability, nor did private tuners subsequently and the "Marvel" was soon abandoned in favour of a more conventional design with an overhead camshaft and two valves, the Manxman.