Kawasaki Z 400 (1974-75) vs BMW K 1200R (2008-10) vs Triumph T120R Bonneville 650 (1966-67)
Comparison technical specifications
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| Make: | Kawasaki | BMW | Triumph |
| Model: | Z 400 | K 1200R | T120R Bonneville 650 |
| Years: | 1974-75 | 2008-10 | 1966-67 |
| Engine: | Four stroke, parallel twin cylinder, SOHC, 2 Valve per cylinder. | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder | Four stroke, parallel twin, OHV |
| Capacity: | 398 cc / 24.2 cu-in | 1157 cc / 70.6 cu in | 649 cc / 39.6 cu in |
| Bore x Stroke: | 64 х 62 mm | 79 X 59 mm | 71 x 82 mm |
| Compression Ratio: | 9.4:1 | 13.0:1 | 8.5:1 |
| Cooling System: | Air cooled | Liquid cooled | Air cooled |
| Induction: | Keihin CVB3 6caburetor | Injection | 2 x Amal 1 - 1/6" carburetors |
| Ignition: | Battery & coil | Electronic | Lucas MA6 alternator with 2 coils |
| Starting: | Electric & kick | Electric | Kick |
| Max Power: | 36 hp / 26.8 kW @ 8500 rpm | 120 kW / 161 hp @ 10250 rpm | 34 kW / 46 hp @ 6500 rpm |
| Transmission: | 5 Speed | 6 Speed | 4 Speed, constant mesh |
| Final Drive: | Chain | Shaft | Chain, 106 links |
| Frame: | Tubular, double cradle | Bridging frame, die-cast aluminium, load bearing engine | Single front downtube, second bracing member running under tank |
| Front Suspension: | Telescopic fork | BMW Motorrad Duolever; central spring strut, rebound damping electronically adjustable with optional ESA | Telescopic forks, hydraulic damping |
| Rear Suspension: | Swing arm | Die-cast aluminium single-sided swinging arm with BMW Motorrad Paralever; central spring strut with lever system, spring pre-load adjustable to continuously variable levels by means of hydraulic handwheel (electronically adjustable with optional ESA), adjustable rebound damping (rebound damping and compression electronically adjustable with optional ESA) | Swingarm, twin Girling dampers |
| Front Brakes: | Single 226mm disc | 2 x ∅320mm discs, 4 piston calipers | 8" SLS drum |
| Rear Brakes: | 180mm Drum | Single ∅265mm disc | 7" SLS drum |
| Front Tyre: | 3.25 - S18 4PR | 120/70-17 | 3.25 x 19, Dunlop Universal |
| Rear Tyre: | 3.50 - SIB 4PR | 180/55-17 | 4.00 x 18, Dunlop Universal |
| Dry Weight: | 175 kg / 386 lbs | 237 kg / 522 lbs | 165 kg / 363 lbs |
| Fuel Capacity: | 14 Litres / 3.6 US gal | 19 L / 5.0 US gal | US: 13.6 L / 3.6 US gal / 3 Imp gal / UK and other Export: 18 L / 4.8 US gal / 4 Imp gal |