Norton’s Manx Grand Prix racer was released in 1939, with post-war production running from 1947 until 1962.
Available in 499cc and 348cc models, it became a definitive over-the-counter racing motorcycle.
Both versions used air-cooled, double-overhead-camshaft single-cylinder engines and close-ratio four-speed gearboxes. Later 500cc machines produced approximately 50–54bhp, weighed around 140kg and, depending on gearing, could approach 140mph.
The 350 developed about 35bhp.
A compact 56-inch wheelbase, Roadholder telescopic forks, large drum brakes, alloy rims and the celebrated Featherbed frame gave the Manx exceptional stability and precise steering.
Its competition record included Geoff Duke’s Senior TT victories in 1950 and 1951, Phil Read’s 1961 Junior TT win and Mike Hailwood’s 1961 Senior TT triumph. Private entrants continued winning major races long after factory production ended.
That legacy survives through specialists including New Zealand racer, engineer and builder Ken McIntosh. In 2014, Bruce Anstey rode a McIntosh-built Manx to the Classic TT’s Hailwood Trophy, recording a 108.110mph lap—the fastest ever achieved by a Manx Norton around the Mountain Course.
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