Aprilia RS4 125 (2012-13) vs Honda EX Super Cub (2018-) vs NSU Motosulm (1933) vs Norton Commando 961 Sport MKII (2018-19) vs Harris GSXR1100 Turbo (1989) vs BMW K1 (1989)
Comparison technical specifications
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| Make: | Aprilia | Honda | NSU | Norton | Harris | BMW |
| Model: | RS4 125 | EX Super Cub | Motosulm | Commando 961 Sport MKII | GSXR1100 Turbo | K1 |
| Years: | 2012-13 | 2018- | 1933 | 2018-19 | 1989 | 1989 |
| Engine: | Four stroke, single cylinder, DOHC, 4 valves | Four stroke, single cylinder, OHC | Single cylinder, 2 stroke, 3 channel timing piston | Four stroke, parallel twin, push rod, hydraulic lifter, 2 valves per cylinder | Four stroke, transverse four cylinder. DOHC. turbo charged. 4 valve per cylinder | Four-stroke, horizontal in line four cylinder, DOHC, 4 valves per cylinder |
| Capacity: | 124.8 cc / 7.6 cu in | 97 cc / 5.9 cu in | 63 cc / 3.8 cub in | 961 cc / 58.6 cu in | 1052 cc / | 987 cc / 60.2 cu in |
| Bore x Stroke: | 58 X 47 mm | 50 x 49.5 mm | 45 x 40 mm | 88 x 79 mm | 76 x 58 mm | 67 x 70 mm |
| Compression Ratio: | 12.5 ± 0.5:1 | 8.8:1 / 9.0.1 | 1:5.5 | 10.1:1 | Carburetors | 11.0:1 |
| Transmission: | 6 Speed | 4-Speed continuous | Direct power transmission through a system of fixed gears | 5 Speed, constant mesh | 5 Speed | 5 Speed |
| Final Drive: | Chain | Belt | Chain | Chain, 525 "O" ring | Chain | Shaft |