| MODEL | AJS MODEL 30 600 1957 |
| Year | 1957 |
| Engine Type | Four stroke, pushrod parallel twin, OHV, 2 valves per cylinder |
| Displacement / Capacity | 593 cc / 36.2 cu in |
| Bore X Stroke | 72 x 72.8 mm |
| Compression Ratio | 7.0 : 1 |
| Cooling System | Air cooled |
| Max Power | 24.6 kW / 33 hp @ 6800 rpm |
| Max Torque | — |
| Ignition | 6 Volt magneto (Lucas K2F) |
| Induction | Carburettor |
| Start System | Kick |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 4 speed |
| Clutch | Multi plate (dry, Burman) |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | Single cradle |
| Front Suspension | Hydraulic telescopic fork |
| Rear Suspension | Twin shock absorbers |
| Front Brakes | Drum |
| Rear Brakes | Drum |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | — |
| Wheelbase | — |
| Ground Clearance | — |
| Dry Weight | 178 kg / 396 lbs |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | 3.25-19 |
| Rear Tyre | 3.50-19 |
| FUEL SYSTEM | |
| Fuel Capacity | 16 Litres / 4.2 US gal |
| Fuel Consumption | — |
| Top Speed | 152 km/h / 95 mph |
The Model 30 was AJS's 600 cc pushrod parallel twin of the mid-1950s, a sibling of the Matchless G11 that differed mainly in paint, badges and exhaust. Its mild 33 hp output gave relaxed cruising near 70 mph, with a reputation for stable handling, comfort and economy rather than outright speed.
