AJS 7R (1952) vs AJS DD125E Mk3 (2012-14) vs Ariel Square Four 4G 1000, Mark I, Mark II (1936-48) vs Suzuki SV 650S (2003-04)
Comparison technical specifications
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| Make: | AJS | AJS | Ariel | Suzuki |
| Model: | 7R | DD125E Mk3 | Square Four 4G 1000, Mark I, Mark II | SV 650S |
| Years: | 1952 | 2012-14 | 1936-48 | 2003-04 |
| Engine: | Single cylinder, 4-stroke, OHC Triple-Camshaft | Twin cylinder, 4-stroke | Four stroke, vertical square four, OHV, 8 valves | Four stroke, 90°-V-twin, DOHC, 4 valves per cylinder |
| Capacity: | 349.2 cc / 21.3 cub in | 124 cc / 7.6 cub in | 997 cc / 60.8 cu in | 645 cc / 39.4 cu-in |
| Bore x Stroke: | 75.5 x 78 mm | 44 x 40 mm | 65 x 78 mm | 81 x 62.6 mm |
| Cooling System: | Air/oil cooled | Air cooled | Air cooled | Liquid cooled |
| Induction: | Carburetor, 1 3/16 Amal | Carburetor | SU carburetor | Fuel Injection |
| Starting: | Kick | Electric | Kick start | Electric |
| 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 | 54.7 kW / 73.4 hp @ 8800 rpm |
| Transmission: | 4-Speed | 5-Speed | 4-Speed | 6 Speed |
| Final Drive: | Chain | Chain | Chain | Chain, #525 O-ring |
| Front Suspension: | Telescopic fork | Telescopic forks | Telescopic fork | Telescopic 41 mm, coil spring, oil damped, fully adjustable preload |
| Rear Suspension: | Dual shocks | Twin oil damped adjustable shocks | Plunger-link spring | KYB single shock, adjustable spring preload |
| Front Brakes: | Drum | Single disc | Drum | 2 x 290 mm Discs, 2 piston calipers |
| Rear Brakes: | Drum | Single disc | Drum | Single 240 mm disc, 2 piston caliper |
| 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 | 169 kg / 372 lbs |
| Fuel Capacity: | 22.7 L / 6.0 US gal | 14 L / 3.7 US gal | 23 L / 6.0 US gal | 17 Litres / 4.5 US gal / 3.7 Imp gal |