Yamaha RD 125 (1973) vs Honda CX 650E (1984) vs Yamaha FZ-09 (2014-15) vs Honda XL 125R (1984-85) vs Yamaha V-Max (2011)
Comparison technical specifications
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| Make: | Yamaha | Honda | Yamaha | Honda | Yamaha |
| Model: | RD 125 | CX 650E | FZ-09 | XL 125R | V-Max |
| Years: | 1973 | 1984 | 2014-15 | 1984-85 | 2011 |
| Engine: | Two stroke, parallel twin | Four stroke, longitudinal 800 V-twin cylinder, camshaft nestles at the base of the V between the cylinders. ,OHV, 4 valves per cylinder operated by pushrods | Four stroke, transverse triple cylinder, DOHC, 4 valve per cylinder | Four stroke, single cylinder, OHC, 2 valves | Four stroke, V-four, DOHC, 4 valve per cylinder. |
| Capacity: | 124 cc / 7.6 cu-in | 673 cc / 41.07 cu-in | 847 cc / 51.6 cu-in | 124 cc / 7.6 cu-in | 1679 cc / 102.4 cu-in |
| Bore x Stroke: | 43 х 43 mm | 82.5 x 63 mm | 78 x 59.1 mm | 56.5 x 49.5 mm | 90 x 66 mm |
| Cooling System: | Air cooled | Liquid cooled | Liquid cooled | Air cooled | Liquid cooled |
| Compression Ratio: | 6.8:1 | 9.8:1 | 11.5:1 | 9.2:1 | 11.3:1 |
| Induction: | 2x 18mm Teikei carburetors | 2x 39mm Keihin carburetors | Electronic Fuel Injection | PD52 carburetor | Mikuni 48mm fuel injection |
| Ignition: | Battery coil | CDI | Transistorized coil ignition | CDI | TCI |
| Starting: | Kick | Electreic | Electric | Kick | Electric |
| Max Power: | 17 hp / 12.4 kW @ 8500 rpm | 64 hp / 47.7 kW @ 8000 rpm | 84.6 kW / 115 hp @ 10,000 rpm | 11.4 hp / 8.3 kW @ 10000 rpm | 147.2 kW / 200 hp @ 9000 rpm |
| Max Torque: | 1.3 kgf-m @ 8000 rpm | 61 Nm / 45 lb-ft @ 6500 rpm | 87.5 Nm / 8.9 kgf-m @ 8,500 rpm | 10 Nm / 7.3 lb-ft @ 8000 rpm | 166.8 Nm / 17.0 kgf-m @ 6500 rpm |
| Transmission: | 5 Speed | 5 Speed | 6 Speed | 6 Speed | 5 Speed with slipper clutch |
| Final Drive: | Chain | Shaft | O"-ring chain | Chain | Shaft |
| Front Suspension: | 28 mm telescopic forks | Air assisted telescopic forks | Telescopic fork | Telescopic forks | 52mm Telescopic forks |
| Rear Suspension: | Dual rear shock pre-load adjustable | Pro-link, air adjustable preload | Swingarm (link suspension) | Swinging arm | Swingarm Link-type suspension |
| Front Brakes: | 150 mm Drum | 2x 280mm discs | Single 245mm disc | Drum | 2x 320mm discs |
| Rear Brakes: | 130 mm Drum | Single 280mm disc | 2x 298mm discs | Drum | Single 280mm disc |
| Front Tyre: | 2.75-18 | 100/90-18 | 120/70 ZR17 M/C (58W) (Tubeless) | 2.75-21 | 120/70 R18 |
| Rear Tyre: | 3.00-18 | 120/90-18 | 180/55 ZR17 M/C (73W) (Tubeless) | 4.10-18 | 200/50 R18 |
| Wet Weight: | 115 kg / 255 lbs | 235.0 kg / 518.1 lbs | 188 kg / 414 lbs - ABS 191 kg / 421 lbs | 126.0 kg / 277.8 lbs | 310 kg / 683 lbs |
| Fuel Capacity: | 11.5 Litres / 3.04 US gal | 19 Litres / 5.0 US gal | 14 Litres / 3.1 US gal | 9 Litres / 2.3 us gal | 15 Litres / 4.0 US gal |