BMW R 1200RS LC (2017) vs Kawasaki Z 650 (2018) vs Yamaha XJ 400 Special (1981)
Comparison technical specifications
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| Make: | BMW | Kawasaki | Yamaha |
| Model: | R 1200RS LC | Z 650 | XJ 400 Special |
| Years: | 2017 | 2018 | 1981 |
| Engine: | Four stroke, two cylinder horizontally opposed Boxer, DOHC, 4 valves per cylinder, Intake 40mm outlet 34 mm | Four stroke, parallel twin cylinder. DOHC, 4 valves per cylinder. | Four stroke, transverse four cylinder. DOHC |
| Capacity: | 1170 cc / 71.4 cub in. | 649 cc / 39.65 cu /in | 398 cc / 24.2 cu-in |
| Bore x Stroke: | 101 x 73 mm | 83 x 60 mm | 51 х 48.8 mm |
| Cooling System: | Liquid / Air cooled | Liquid cooled | Air cooled |
| Compression Ratio: | 12.5:1 | 10.8:1 | 9.7:1 |
| Induction: | Throttle valve mm 52 Carburetion BMS-X Emission control Closed-loop 3-way catalytic converter | DFI® with Keihin 36mm Keihin throttle bodies | 2x 34mm Mikuni carburetor |
| Ignition: | BMS-K | TCBI with electronic advance | Battery powered inductive |
| Starting: | Electric | Electric | Electric |
| Max Power: | 92 kW / 125 hp @ 7750 rpm | 50.2 kW / 67.3 hp @ 8,500 rpm | 45 hp / 32.8 kW @ 10000 rpm |
| Max Torque: | 125 Nm / 12.7 kgf-m / 92 lb-ft @ 6500 rpm | 65.7 Nm / 48.4 lb-ft @ 7000 rpm | 3.5 kgf-m / 25 lb-ft@ 8000 rpm |
| Transmission: | Constant mesh 6-speed gearbox with helical gear teeth | 6 Speed | 6 Speed |
| Final Drive: | Shaft | Sealed chain | Chain |
| Front Suspension: | Telescopic Upside-Down fork; stanchion diameter 45 mm | 41 mm hydraulic telescopic fork | 35mm Telescopic forks |
| Front Wheel Travel: | 140 mm / 5.5 in | 125 mm / 4.9 in | 142 mm / 5.6 in |
| Rear Suspension: | Cast aluminium single-sided swing arm with BMW Motorrad Paralever; WAD strut (travel-related damping), spring pre-load hydraulically adjustable (continuously variable) at handwheel, rebound damping adjustable at handwheel | Horizontal Back-link with adjustable preload | Single shock, adjustable spring preload |
| Rear Wheel Travel: | 140 mm / 5.5 in | 130 mm / 5.1 in | 96 mm / 3.8 in |
| Front Brakes: | 2 X 320 floating discs 4 piston calipers | 2x 300mm discs 2 piston calipers | Single discs 2 piston caliper |
| Rear Brakes: | Single 275mm disc 2 piston caliper, | Single 220mm disc | Drum |
| Front Tyre: | 120/70 ZR 17 | 120/70 -17 | 3.00-19 |
| Rear Tyre: | 180/55 ZR 17 | 160/50 -17 | 110 90-18 |
| Fuel Capacity: | 18 Litres / 5.3 US gal | 15 Litres / 4.0 US gal | 15 Litres / 3.9 US gal |