KTM 640 Duke II (2001-02) vs Cagiva Mito 125 Special Editions (1999) vs Kawasaki ZR-X 400 II (2001-03) vs KTM 640 Duke II (2007) vs Yamaha XS 850G (1979)
Comparison technical specifications
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| Make: | KTM | Cagiva | Kawasaki | KTM | Yamaha |
| Model: | 640 Duke II | Mito 125 Special Editions | ZR-X 400 II | 640 Duke II | XS 850G |
| Years: | 2001-02 | 1999 | 2001-03 | 2007 | 1979 |
| Engine: | Four stroke, single Cylinder. SOHC, 4 valves, engine balancer | Two stroke, single cylinder, electric variable power read valve | Four stroke parallel twin cylinder. DOHC, 2 valves per cylinder | Four stroke, single Cylinder. SOHC, 4 valves, engine balancer | Four stroke, transverse three cylinder, DOHC, 2 valves per cylinder |
| Capacity: | 624.6 cc / 38.1 cu in | 125.6 cc / 7.6 cu-in | 399 cc / 24.4 cu-in | 624.6 cc / 38.1 cu in | 826 cc / 50.4 cu in |
| Bore x Stroke: | 101 x 78 mm | 56 x 50.6 mm | 57.5 х 38.5 mm | 101 x 78 mm | 71.5 x 68.6 mm |
| Compression Ratio: | 11.5:1 | 6.3:1 | 11.2:1 | 11.5:1 | 9.2:1 |
| Cooling System: | Liquid cooled | Liquid cooled | Liquid cooled | Liquid cooled | Air cooled |
| Induction: | Mikuni BST 40 carburetor | Dell'Orto carb | 4x Keihin CVK30 carburetors | Mikuni BST 40 carburetor | 3 x 34mm Hitachi carburetors |
| Ignition: | Kokusan contactless DC-CDI ignition with advanced system | CDI | Battery & coil | Kokusan contactless DC-CDI ignition with advanced system | Battery powered triggered |
| Starting: | Electric & kick | Electric | Electric | Electric & kick | Electric |
| Max Power: | 40.1 kW / 55 hp @ 7000 rpm | 34 hp / 24.8 kW @ 12000 rpm | 62 hp / 46.2 kW @ 11500 rpm | 40.1 kW / 55 hp @ 7000 rpm | 57.7 kW / 79 hp @ 8500 rpm |
| Transmission: | 5 Speed | 6 Speed | 6 Speed | 5 Speed | 5 Speed |
| Final Drive: | Chain, O-ring 5/8 x 1/4" | Chain | Chain | Chain, O-ring 5/8 x 1/4" | Shaft |
| Front Suspension: | WP - 4054 Roma Top adjuster, preload, compression and rebound adjustable | 40mm Marzocchi telescopic forks | 39mm RWU telescopic forks | WP - 4054 Roma Top adjuster, preload, compression and rebound adjustable | Air assisted telescopic forks |
| Rear Suspension: | Central shock absorber WP IBS with PRO-LEVER linkage to rear- swing-arm with needle bearing | Progressive with hydralyc shock, adjustable spring preload | Dual shocks preload adjustment | Central shock absorber WP IBS with PRO-LEVER linkage to rear- swing-arm with needle bearing | Swing arm 4-way adjustable damping |
| Front Brakes: | Single 320 mm disc, 4 piston caliper | Single 320mm disc 4 piston caliper | 2x 298mm discs 6 piston calipers | Single 320 mm disc, 4 piston caliper | 2 x 267mm Discs, 1 piston calipers |
| Rear Brakes: | Single 220 mm disc, 1 piston caliper | Single 230mm disc 2 piston caliper | Single 240mm disc 2 piston caliper | Single 220 mm disc, 1 piston caliper | Single 267mm disc, 1 piston caliper |
| Front Tyre: | 120/70 - ZR17 58H | 110/70 ZR17 | 110/80-17 | 120/70 - ZR17 58H | 3.25-19 |
| Rear Tyre: | 160/60 - ZR17 69H | 150/60 ZR17 | 150/70-18 | 160/60 - ZR17 69H | 4.00-18 |
| Fuel Capacity: | 11.3 L / 3.0 US gal / 2.4 Imp gal | 14 Litres / 3.7 US gal | 16 Litres / 4.2 US gal | 11.3 L / 3.0 US gal / 2.4 Imp gal | 24 Litres / 6.3 US gal |