Sunbeam B1 (1957-64) vs KTM 300 EXC Enduro (2003-04) vs Kawasaki ER-6n (2016)
Comparison technical specifications
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| Make: | Sunbeam | KTM | Kawasaki |
| Model: | B1 | 300 EXC Enduro | ER-6n |
| Years: | 1957-64 | 2003-04 | 2016 |
| Engine: | Parallel twin cylinder, 4 stroke | Two stroke, single cylinder | Four stroke, parallel twin, DOHC, 4 valves per cylinder. |
| Capacity: | 250 cc / 15.3 cu in | 293 cc / 17.9 cu in | 649 cc / 39.6 cu-in |
| Bore x Stroke: | 56 x 50.6 mm | 71.1 x 71.1 mm | 83 X 60 mm |
| Cooling System: | Forced air cooled | Liquid cooled | Liquid cooled, |
| Compression Ratio: | 6.5:1 | 11.0:1 | 11.3;1 |
| Starting: | Electric | Kick | Electric |
| Transmission: | Four speed | 5 Speed | 6 Speed |
| Final Drive: | Enclosed chain in oil bath | Chain, Regina O-ring | Chain |
| Frame: | Tubular frame | Central double cradle, CrMo4 | Perimeter, high-tensile steel |
| Ground Clearance: | 127 mm / 5.0" | 386 mm / 15.2 in | 130 mm / 5.1 in |
| Front Brakes: | Drum, 127 mm diameter | Single260 mm disc, 2 piston caliper | 2x 300mm discs 2 piston Calipers |
| Rear Brakes: | Drum, 127 mm diameter | Single 220 mm disc, 1 piston caliper | Single 220mm disc 1 piston Caliper |