Background
Widely lauded as the pinnacle of firm’s Dominator range that first broke cover in 1949, the Norton 650SS (the SS stands for Sport Special) arrived 13 years later – and boy, was it worth the wait.
Built to conquer the track and road, the 647cc engine inhales through a pair of Amal Monobloc carburettors and exhales through twin exhausts via a downdraft cylinder head that was developed from the Domiracer that Tom Phillis had taken to third place in the Isle of Man Senior TT.
The 49bhp engine sits in Norton’s light-and-rigid Featherbed frame, and the forks are the firm’s innovative Roadholders; the result is a motorcycle whose handling is every bit as good as its performance – and its performance tops out at two miles a minute with a following wind.
It’s a civilised motorcycle too, offering plenty of torque across a wide rev range; dial in a suitably rorty exhaust note and even pottering around town has never been more satisfying.
With engineering this sublime, Norton was content to keep styling as simple as possible: The featherbed, with its curved rear subframe, is black; the 4½-gallon petrol tank is silver; and the tachometer and speedometer, which sit in front of flat handlebars, are open – and if Jack-the-lads felt the need to show off, chrome mudguards could be added to the invoice.
The Classic Motor Cycle magazine tested a Norton 650SS in its May 2025 issue, and concluded:
“The Norton felt taut, planted, and sure-footed; the Slimline [Featherbed] and Roadholder combination working in perfect harmony. Even as the Leicestershire roads threw ruts, bumps, and undulations at it, the Norton held its line flawlessly.
If money were no object and I wanted the finest example of a British 650cc twin…you’d have a hard time arguing me out of choosing a Norton 650SS.”








