| MODEL | NORTON 500 MODEL 18 1947 - 1954 |
| Year | 1947 - 1954 |
| Engine Type | Single cylinder, 4 stroke, pushrod OHV |
| Displacement / Capacity | 490 cc / 29.9 cu in |
| Bore X Stroke | 79 x 100 mm |
| Compression Ratio | 6.45:1 |
| Cooling System | Air cooled |
| Max Power | 15.4 kW / 21 hp |
| Max Torque | — |
| Ignition | Magneto |
| Induction | Amal Monobloc 276 carburettor |
| Start System | Kick |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | — |
| Clutch | — |
| Final Drive | — |
| CHASSIS SPECS | |
| Frame | — |
| Front Suspension | Roadholder telescopic fork |
| Rear Suspension | Rigid, spring-loaded saddle (ES2: plunger) |
| Front Brakes | — |
| Rear Brakes | — |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | — |
| Wheelbase | — |
| Ground Clearance | — |
| Dry Weight | 169.6 kg / 374 lb |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | — |
| Rear Tyre | — |
| FUEL SYSTEM | |
| Fuel Capacity | — |
| Fuel Consumption | — |
| Top Speed | 126 km/h / 78 mph |
The post-war Model 18 was the first pushrod Norton single back in production, using the new Roadholder telescopic forks but keeping a rigid rear end. It was a simple, durable 500 roadster, built alongside the plunger-framed ES2 until the rigid model was phased out in 1954.
