KTM 250 EX/C Enduro (1997-98) vs Norton 650SS (1968) vs Norton Commando 750 Production Racer (1968-71)
Comparison technical specifications
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| Make: | KTM | Norton | Norton |
| Model: | 250 EX/C Enduro | 650SS | Commando 750 Production Racer |
| Years: | 1997-98 | 1968 | 1968-71 |
| Engine: | Two stroke, single cylinder | Four stroke, parallel twin cylinder, push rod, 2 valves per cylinder. | Parallel twin cylinder, 4-stroke, OHV |
| Capacity: | 249 cc / 15.2 cu in | 647 cc / 39.5 cu in | 745 cc / 45.5 cu in |
| Bore x Stroke: | 67.5 x 69.5 mm | 68 X 89 mm | 73 x 89 mm |
| Cooling System: | Liquid cooled | Air cooled | Air cooled |
| Compression Ratio: | 6.0:1 | 8.9:1 | 10.25:1 |
| Induction: | Keihin PWK 36 S AG Carburettor | 2 x Ø30 mm Amal concentric carburetors | 2 x Ø32 mm Amal GP carburetors |
| Starting: | Kick | Kick | Electric and kick |
| Transmission: | 5 Speed | 4 Speed | 5 Speed Rod Quaife gearbox, close ratio |
| Final Drive: | Chain, 5/8" x 1/4" | Chain | Chain |
| Front Suspension: | WP Extreme Ø 50 mm upsidedown fork | Telescopic forks | Telescopic forks |
| Rear Suspension: | WP Progressive Damping System shock absorber, aluminium swingarm | Dual shocks, 5-way adjustable | Dual shocks, swingarm |
| Front Brakes: | Single 260 mm disc, floating caliper | Ø203 mm Drum | Drum later models Single disc |
| Rear Brakes: | Single 220 mm disc, floating caliper | Ø178 mm Drum | Drum |
| Dry Weight: | 108.2 kg / 238.5 lbs | 185 kg / 408 lbs | 182 kg / 400 lbs |
| Fuel Capacity: | 9.5 Litres or 12 L / 2.5 US gal or 3.2 US gal | 13.5 L / 3.6 US gal | 22.7 L / 6 US gal |