Big 4 1947-54, 596cc, sv single, 400lb, 50mpg, 65mphPre-war relic intended to pull a sidecar with loads over long distances at a slow speed. Over-priced because of the Norton name, and spares are very rare and hard to get hold of.

Model 19 1955-57, 596cc, ohv single, 385lb, 60mpg, 70mphMonster 600cc single for the sidecar with little to commend it except rarity. Suffix ‘S’ stands for sprung and ‘R’ for rigid.

Dominator 99 1956-60, 596cc, ohv twin, 420lb, 55mpg, 100mphStretched 88 with a little more speed and also vibration. The Wideline frame made sure  that you could get the maximum use of its performance.Dominator 99SS 1961-62, 596cc, ohv twin, 425lbs, 55mpg, 115mphTuned 600 with twin carbs, high compression pistons, big valves and radical valve timing. Suffers excessive vibration at high speeds. Slimline frame gives excellent handling and comfort. Dominator 650 1960-63, 646cc, ohv twin, 400lbs, 60mpg, 110mph Another enlargement on the 600 engine with a single carb. Lacks top end power but lots of torque lower down the range and excellent gearchange action, with the handling of the slimline featherbed frame.Dominator 650SS 1961-69, 646cc, ohv twin, 420lb, 50mpg, 110mphStretched 99 with good performance and greater vibration. Still using the slimline featherbed frame. A nice bike but over-rated.

Commando 850  1973-77,  829cc ohv twin, 425lbs, 40/50mpg, 115/120mphThe Interstate had large tank and higher gearing. The last models had electric start and gearchange on the left side.

P10 1965, 800cc, ohc twin, prototypeAn experimental model that never made it into production. This was to replace the aging Atlas. While the engine failed, the frame was the forerunner for the successful Commando.

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