AJS 7R (1952) vs AJS DD125E Mk3 (2012-14) vs Ariel Square Four 4G 1000, Mark I, Mark II (1936-48)
Comparison technical specifications
Add bike |
Remove bike |
Remove bike |
Remove bike |
| Make: | AJS | AJS | Ariel |
| Model: | 7R | DD125E Mk3 | Square Four 4G 1000, Mark I, Mark II |
| Years: | 1952 | 2012-14 | 1936-48 |
| Engine: | Single cylinder, 4-stroke, OHC Triple-Camshaft | Twin cylinder, 4-stroke | Four stroke, vertical square four, OHV, 8 valves |
| Capacity: | 349.2 cc / 21.3 cub in | 124 cc / 7.6 cub in | 997 cc / 60.8 cu in |
| Bore x Stroke: | 75.5 x 78 mm | 44 x 40 mm | 65 x 78 mm |
| Cooling System: | Air/oil cooled | Air cooled | Air cooled |
| Exhaust: | 1-into-1 | 2-into-2, chrome | Mk I, Mk II: 2 x 2-into-1 |
| Induction: | Carburetor, 1 3/16 Amal | Carburetor | SU carburetor |
| Starting: | Kick | Electric | Kick start |
| Max Power: | 29.8 kW / 40 hp @ 8000 rpm | 8 kW / 11 hp | F4 G, Mk I: 26 kW / 35 hp @ 5500 rpm Mk II: 34 kW / 45 hp @ 5500 rpm |
| Transmission: | 4-Speed | 5-Speed | 4-Speed |
| Final Drive: | Chain | Chain | Chain |
| Front Suspension: | Telescopic fork | Telescopic forks | Telescopic fork |
| Rear Suspension: | Dual shocks | Twin oil damped adjustable shocks | Plunger-link spring |
| Front Brakes: | Drum | Single disc | Drum |
| Rear Brakes: | Drum | Single disc | Drum |
| Wheels: | Steel, wire spokes | Multi spoke, alloy | Steel, laced wire spokes |
| Dry Weight: | 129 kg / 285 lbs | 145 kg / 329 lbs | 4G: 211 kg / 465 lbs Mk I: 197 kg / 435 lbs Mk II: 193 lg: 425 lbs |
| Fuel Capacity: | 22.7 L / 6.0 US gal | 14 L / 3.7 US gal | 23 L / 6.0 US gal |