AJS Model 20 500 (1948-61) vs GIMA Gima 250 Act (1953-55) vs Honda CBR 400R (2016-17) vs Vespa 50 (N, L, R, S, SS, SR) (1963-90)
Comparison technical specifications
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| Make: | AJS | GIMA | Honda | Vespa |
| Model: | Model 20 500 | Gima 250 Act | CBR 400R | 50 (N, L, R, S, SS, SR) |
| Years: | 1948-61 | 1953-55 | 2016-17 | 1963-90 |
| Engine: | Four stroke, parallel twin cylinder, OHV. 2 valve per cylinder, Crankshaft: 3-saved plain bearing / roller bearing | Four stroke | Four stroke, parallel-twin, DOHC; 4 valves per cylinder | Two stroke, single cylinder |
| Capacity: | 498 cc / 30.4 cu in | 250 cc /15.26 cu in | 399 cc / 24.3 cu-in | 49.8 cc / 3.0 cub in |
| Starting: | Kick | Kick | Electric | Kick start |
| Max Power: | 21.6 kW / 29 hp | 11.2 kW / 15 hp | 46 hp / 34 kW @ 9500 rpm | 1.9 kW / 2.6 Hp @ 4500 rpm |
| Transmission: | 4 Speed | 4 Speed | 6 Speed | 3 Speed mesh gears |
| Final Drive: | Chain | Chain | O-ring-sealed chain | Direct drive |
| Front Suspension: | Hydraulic telescopic fork | Telescopic forks | 41mm Telescopic fork | Hydraulic shock absorber with rubber elements |
| Rear Suspension: | Dual chocks | Plunger | Pro-Link single shock with nine-position spring preload adjustability; | Hydraulic shock absorber |
| Front Brakes: | Drum | Drum | Single 320mm wave disc 2 piston calipers | Drum |
| Rear Brakes: | Drum | Drum | Single 240mm wave disc 1 piston calipers | Drum |