Yamaha XS 650 / XS 650D (1977) vs Yamaha RZ 125S (1983-84) vs Kawasaki ZX-10R Ninja (2014) vs Yamaha DT 230 Lanza (1997-00)
Comparison technical specifications
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| Make: | Yamaha | Yamaha | Kawasaki | Yamaha |
| Model: | XS 650 / XS 650D | RZ 125S | ZX-10R Ninja | DT 230 Lanza |
| Years: | 1977 | 1983-84 | 2014 | 1997-00 |
| Engine: | Four stroke, parallel twin cylinder, SOHC, 2 valves per cylinder. | Two stroke, single cylinder | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder. | Two stroke, single-cylinder. |
| Capacity: | 653 cc / 39.8 cu in | 123 cc / 7.5 cu-in | 998 cc / 60.9 cu-in | 224 cc / 13.6 cu-in |
| Bore x Stroke: | 75 x 74 mm | 56 х 50 mm | 76 x 55 mm | 66.8 x 64 mm |
| Compression Ratio: | 8.4:1 | 6.4:1 | 13.0:1 | 6.5:1 |
| Cooling System: | Air cooled | Liquid cooled | Liquid cooled | Liquid cooled |
| Induction: | 2 x Mikuni BS38 carburetors | 24mm Mikuni carburetors | DFI® with four 47mm Keihin throttle bodies with oval sub-throttles, two injectors per cylinder | Carburettor |
| Ignition: | Battery, induction coil | Hitachi CDI | TCBI with digital advance and Sport-Kawasaki Traction Control (S-KTRC) | CDI Digital |
| Starting: | Electric and kick | Kick | Electric | Electric |
| Max Power: | 39.5 kW / 53 hp @ 7200 rpm | 20 hp / 15.5 kW @ 9500 rpm | 199.8 hp / 147 kW @ 13000 rpm | 29.4 kW / 40 PS @ 8500 rpm |
| Max Torque: | 54 Nm / 5.5 kgf-m / 39.8 lb-ft @ 6800 rpm | 1.6 kgf-m / 16 Nm @ 9250 rpm | 114.3 Nm / 11.62 kg-m @ 1150 rpm | 36 NM / 3.7gf･m @ 7000 rpm |
| Front Suspension: | Telescopic forks | 32mm Telescopic forks | 43mm Big Piston Fork (BPF), rebound, compression and spring preload adjustability. | Oil telescopic forks |
| Rear Suspension: | Dual shock absorbers | Monocross linkage 6-way preload adjustment | Horizontal Back-link. High/low-speed compression, rebound and preload adjustable. 4.9in wheel travel | Motocross |
| Front Brakes: | Twin hydraulic discs, 267 mm | Single 245mm disc | 2x 310 mm petal discs, radial-mount 4-piston calliper | Single disc |
| Rear Brakes: | Drum | 130mm Drum | Single 220mm petal disc | Single disc |
| Front Tyre: | 3.50H-19 4PR | 2.75-18-4PR | 120/70 ZR17 | 3.00-21 |
| Rear Tyre: | 4.00H-18 4PR | 3.00-18-6PR | 190/55 ZR17 | 4.60-18 |
| Seat Height: | 810 mm / 31.9" | 775 mm / 30.5 in | 812 mm / 32 in | 865 mm / 34.0 in |
| Fuel Capacity: | 15 Litres / 4.0 US gal | 13 Litres / 3.4 US gal | 17 Litres / 4.5 US gal | 11 Litres / 2.9 US gal |