Yamaha GX 750 Sport (1978-79) vs BMW K 1300 S Motorsport Special Edition (2015) vs Kawasaki GPz 500S / EX 500R Ninja (1989-90) vs Ducati 1000MHR (Mike Hailwood Replica) (1984)
Comparison technical specifications
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| Make: | Yamaha | BMW | Kawasaki | Ducati |
| Model: | GX 750 Sport | K 1300 S Motorsport Special Edition | GPz 500S / EX 500R Ninja | 1000MHR (Mike Hailwood Replica) |
| Years: | 1978-79 | 2015 | 1989-90 | 1984 |
| Engine: | Four stroke, transverse three cylinder. DOHC | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder | Four stroke, parallel twin cylinders. DOHC, 4 valves per cylinder. | Four stroke, 90°“L”twin cylinder, SOHC, desmodromic 2 valves per cylinder, bevel gear driven |
| Capacity: | 747 cc / 45.5 cu-in | 1298 cc / 79.2 cu in | 498 cc / 30.4 cu-in | 973 cc / 59.4 cu in |
| Bore x Stroke: | 68 х 68.6 mm | 80 x 64.3 mm / 3.15 x 2.53 in | 74 x 58 mm | 88 x 80 mm |
| Compression Ratio: | 8.5:1 | 13.0:1 | 10.8:1 | 9.3:1 |
| Induction: | Mikuni Thorex SU type BS34 | Electronic fuel injection, Digital Motor Electronics with integrated knock control (BMS-K) | 2x Keihin CVK34 carburetor | 2 x 40 mm Dell'Orto PHM 40B carburetors |
| Ignition: | Battery point | Digital CDI | TCI (Transistor Controlled Ignition) | Bosch electronic |
| Starting: | Electric | Electric | Electric | Electric |
| Max Power: | 67 hp / 50 kW @ 7000 rpm | 127 kW / 173 hp @ 9250 rpm | 60 hp / 43.7 kW @ 9800 rpm | 55.9 kW 76 hp @ 6700 rpm |
| Max Torque: | 6.3 kgf-m @ 6500 rpm | 140 Nm / 14.3 kgf-m / 103 lb-ft @ 8250 rpm | 46.1 Nm / 4.7 kg-m @ 8500 rpm | 84 Nm / 8.6 kgf-m / 62 ft-lb @ 5800 rpm |
| Transmission: | 5 Speed | 6 Speed | 6 Speed | 5 Speed |
| Final Drive: | Shaft | Shaft | Chain | Chain |
| Front Suspension: | Telescopic forks | BMW Motorrad Duolever, central spring strut, Paralever; central spring strut with lever system | 38mm Telescopic forks | 38 mm Marzocchi oil damped telescopic fork |
| Rear Suspension: | Dual shocks | Cast aluminium single swing arm with BMW Motorrad, spring pre-tension with infinite hydraulic adjustment | Swinging arm, single shock adjustable for spring preload | Marzocchi dual shocks, 5-way spring preload adjustable |
| Front Brakes: | Single disc | 2x 320mm discs, 4 piston calipers | Single 270mm disc 2 piston caliper | 2 x 280 mm Discs, 2 piston calipers |
| Rear Brakes: | Single disc | Single 265mm disc, 2 piston caliper | 160mm drum | Single 260 mm disc, 1 piston caliper |
| Front Tyre: | F3.25-19 | 120/70 ZR17 | 100/90-16 | 110/90 V18 |
| Rear Tyre: | 4.00-18 | 190/55 ZR17 | 120/90-16 | 130/90 V18 |
| Dry Weight: | 229 kg / 502.6 lbs | 228 kg / 503 lbs | 170 kg / 370 lbs | 196 kg / 430 lbs |
| Fuel Capacity: | 17 Litres / 4.5 US gal | 19 Litres / 5.0 US gal | 15.9 Litres / 4.2 US gal | 18 L / 4.8 US gal / 4.0 Imp gal |