Sunbeam Model 6 "Lion" (1921-37) vs Sunbeam S7 500, S7 500 De Luxe (1946-56) vs Derbi GPR 125 (2011-)
Comparison technical specifications
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| Make: | Sunbeam | Sunbeam | Derbi |
| Model: | Model 6 "Lion" | S7 500, S7 500 De Luxe | GPR 125 |
| Years: | 1921-37 | 1946-56 | 2011- |
| Engine: | Single cylinder, side valve | Parallel twin, SOHC | Two stroke, single cylinder |
| Capacity: | 492 cc / 30.0 cu in | 487 cc / 29.7 cu in | 124.7 cc / 7.6 cu-in |
| Bore x Stroke: | 77 x 105.5 mm | 70 x 63.5 mm | 56 x 50 mm |
| Cooling System: | Air cooled | Air/Oil cooled | Liquid cooled |
| Compression Ratio: | 5.0:1 | 6.5:1 | 12.5:1 |
| Starting: | Kick | Kick | Electric |
| Transmission: | 3-Speed wide ratio | 4-Speed | 6 Speed |
| Final Drive: | Chain | Shaft | Chain |
| Front Suspension: | Druid forks | Telescopic, one way damped | 40mm Fourche USD hydraulic forks, 120mm wheel travel |
| Rear Suspension: | Rigid, spring loaded saddle | Plunger, spring loaded saddle | Monoshock, 110mm wheel travel |
| Front Brakes: | Drum | Drum, leading shoe, 203 mm / 8" | Single 300mm disc 4 piston caliper |
| Rear Brakes: | Drum | Drum, leading shoe, 203 mm / 8" | Single 180mm disc 2 piston caliper |
| Dry Weight: | 136 kg / 300 lbs | 195 kg / 430 lbs | 123 kg / 271 lbs |