KTM 250 EX/C Enduro (1997-98) vs Norton 650SS (1968) vs Norton Commando 750 Production Racer (1968-71) vs KTM 620 LC4 Adventure (1997) vs KTM 125 EXC Enduro (1997-98)
Comparison technical specifications
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| Make: | KTM | Norton | Norton | KTM | KTM |
| Model: | 250 EX/C Enduro | 650SS | Commando 750 Production Racer | 620 LC4 Adventure | 125 EXC Enduro |
| Years: | 1997-98 | 1968 | 1968-71 | 1997 | 1997-98 |
| Engine: | Two stroke, single cylinder | Four stroke, parallel twin cylinder, push rod, 2 valves per cylinder. | Parallel twin cylinder, 4-stroke, OHV | Four stroke, single cylinder, SOHC, 4 valves | Two stroke, single cylinder |
| Capacity: | 249 cc / 15.2 cu in | 647 cc / 39.5 cu in | 745 cc / 45.5 cu in | 609 cc / 37.2 cu in | 124.8 cc / 7.6 cu in |
| Bore x Stroke: | 67.5 x 69.5 mm | 68 X 89 mm | 73 x 89 mm | 101 x 76 mm | 54 x 54.5 mm |
| Cooling System: | Liquid cooled | Air cooled | Air cooled | Liquid cooled | Liquid cooled |
| Compression Ratio: | 6.0:1 | 8.9:1 | 10.25:1 | 10.4:1 | 12.5:1 |
| Induction: | Keihin PWK 36 S AG Carburettor | 2 x Ø30 mm Amal concentric carburetors | 2 x Ø32 mm Amal GP carburetors | Dell'Orto PHM 40 SD | Dell-Orto 37 mm flat slide carburetor |
| Starting: | Kick | Kick | Electric and kick | Kick & electric | Kick |
| Transmission: | 5 Speed | 4 Speed | 5 Speed Rod Quaife gearbox, close ratio | 5 Speed | 6 Speed |
| Final Drive: | Chain, 5/8" x 1/4" | Chain | Chain | Chain | Chain |
| Front Suspension: | WP Extreme Ø 50 mm upsidedown fork | Telescopic forks | Telescopic forks | 50mm Telescopic forks, compression and rebound adjustable | 43 mm Marzocchi Magnum 45 upside down fork and shocks |
| Rear Suspension: | WP Progressive Damping System shock absorber, aluminium swingarm | Dual shocks, 5-way adjustable | Dual shocks, swingarm | Single chock, preload, compression and rebound adjustable | Fully adjustable Ohlins Type 3A mono shock |
| Front Brakes: | Single 260 mm disc, floating caliper | Ø203 mm Drum | Drum later models Single disc | Single 320 mm disc, 4 piston caliper | Single 260 mm disc,2 piston caliper |
| Rear Brakes: | Single 220 mm disc, floating caliper | Ø178 mm Drum | Drum | Single 220 mm disc, 1 piston caliper | Single 220 mm disc,1 piston caliper |
| Dry Weight: | 108.2 kg / 238.5 lbs | 185 kg / 408 lbs | 182 kg / 400 lbs | 146 kg / 322 lbs | 94.5 kg / 208 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 | 28 L / 7.4 US gal / 6.2 Imp gal | 9 L / 2.4 US gal / 2.0 Imp gal |