BMW R 100T (1978) vs Kawasaki GPz 500S / EX 500R Ninja (1989-90) vs Kawasaki 550 Zephyr (1991) vs Kawasaki Zephyr 400 (1989-91)
Comparison technical specifications
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| Make: | BMW | Kawasaki | Kawasaki | Kawasaki |
| Model: | R 100T | GPz 500S / EX 500R Ninja | 550 Zephyr | Zephyr 400 |
| Years: | 1978 | 1989-90 | 1991 | 1989-91 |
| Engine: | Air cooled, four stroke, two cylinder horizontally opposed Boxer, 2 valves per cylinder. | Four stroke, parallel twin cylinders. DOHC, 4 valves per cylinder. | Four stroke Transverse four cylinder. DOHC, 2 valves per cylinder. | Four stroke parallel twin cylinder. DOHC, 2 valves per cylinder |
| Capacity: | 980 cc / 59.8 cu in | 498 cc / 30.4 cu-in | 553 cc / 33.7 cu-in | 399 cc / 24.4 cu-in |
| Bore x Stroke: | 94 x 70.6 mm | 74 x 58 mm | 58 x 52.4 mm | 55 х 42 mm |
| Compression Ratio: | 9.5:1 | 10.8:1 | 9.5:1 | 9.7:1 |
| Induction: | 2 x Bing V94 Carburetors | 2x Keihin CVK34 carburetor | 4x 30mm Keihin carburetors | 4X Keihin CVK30 carburetors |
| Ignition: | Battery ignition | TCI (Transistor Controlled Ignition) | Full transistor | |
| Starting: | Electric | Electric | Electric | Electric |
| Max Power: | 51 kW / 70 hp @ 7250 rpm | 60 hp / 43.7 kW @ 9800 rpm | 49 hp / 37 kW @ 10000 rpm | 49 hp / 36.8 kW @ 11000 rpm |
| Max Torque: | 77 Nm / 7.85 kgf-m / 56.8 lb-ft @ 5500 rpm | 46.1 Nm / 4.7 kg-m @ 8500 rpm | 40 Nm / 29.5 lb-ft @ 6000 rpm | 3.1 kgf m / 22.4 lb-ft @ 10500 rpm |
| Transmission: | 5 Speed | 6 Speed | 6 Spee | 6 Speed |
| Final Drive: | Shaft | Chain | Chain | Chain |
| Front Suspension: | Telescopic fork with hydraulic shock absorber | 38mm Telescopic forks | 39mm Telescopic forks | Telescopic forks |
| Rear Suspension: | Paralever swinging arm | Swinging arm, single shock adjustable for spring preload | Dual Kayaba shocks with preload and rebound adjustments | Dual shocks |
| Front Brakes: | 2 x ∅260mm Discs, 2 piston calipers | Single 270mm disc 2 piston caliper | 2x 300mm discs 2 piston calipers | 2x discs |
| Rear Brakes: | ∅260mm Drum | 160mm drum | Single 245mm disc 1 piston caliper | Single disc |
| Front Tyre: | 1.85 B19 | 100/90-16 | 110/80-17 | 110/80-17 |
| Rear Tyre: | 2.75 C18 | 120/90-16 | 140/70-18 | 140/70-18 |
| Dry Weight: | 215 kg / 474 lbs | 170 kg / 370 lbs | 179 kg / 394.6 lbs | 179 kg / 395 lbs |
| Fuel Capacity: | 24 Litres / 6.3 US gal | 15.9 Litres / 4.2 US gal | 15 Litres / 3.9 US gal | 14 Litres / 3.6 US gal |