Velocette MAC (post war) (1946-59) vs Yamaha SR 400SP (1979) vs Honda GL 650 Silver Wing (1983-)
Comparison technical specifications
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| Make: | Velocette | Yamaha | Honda |
| Model: | MAC (post war) | SR 400SP | GL 650 Silver Wing |
| Years: | 1946-59 | 1979 | 1983- |
| Engine: | Four stroke, single cylinder, OHV | Four stroke, single cylinder, SOHC, 2 valves per cylinder. | Four-stroke. longitudinal 800 V-twin, SOHC, 4 valves per cylinder operated by pushrods |
| Capacity: | 349 cc / 21.3 cub in | 399 cc / 24.3 cu-in | 673 cc / 41.1 cub in. |
| Bore x Stroke: | 68.5 x 96 mm | 87 х 67.2 mm | 82.5 x 63 mm |
| Compression Ratio: | 6.75:1 (from 1951) | 8.5:1 | 9.8:1 |
| Cooling System: | Air cooled | Air cooled | Liquid cooled |
| Ignition: | Lucas K2F magneto | CDI | Transistor |
| Starting: | Kick start | Kick | Electric |
| Max Power: | 11 kW / 15 hp @ 6300 rpm | 27 hp / 17.1 KW @ 7000 rpm | 47.5 kW / 64 hp @ 8000 rpm |
| Transmission: | 4 Speed | 5 Speed | 5 Speed |
| Final Drive: | Chain | Chain | Shaft |
| Front Suspension: | Pre war: Webb girder style Post war: Air-sprung Dowty Oleomatic forks | 35mm Telescopic fork | Telescopic coil spring air assisted |
| Rear Suspension: | Hydraulic shocks | Dual shocks, 5-way adjustable preload | Swing arm compound linkage to single shock |
| Front Brakes: | 7 in., drum | Single disc | 2 x 240 mm discs, 2 piston calipers |
| Rear Brakes: | 6 in., drum | Drum | Drum |
| Front Tyre: | 3.25 x 19 in | 3.50-19 | 2.15-19 |
| Rear Tyre: | 3.25 x 19 in | 4.00-16 | 130/90-16 |
| Fuel Capacity: | 11.4 L / 3 US gal | 12 Litres / 3.2 gal | 17.5 Litres / 4.62 US gal |