KTM 125 Sting (1997-99) vs Yamaha RD 125 (1977) vs Yamaha XJ 400Z-E (1983) vs Yamaha FJR 1300AE (2007) vs Kawasaki KLE 650 Versys (2009-10)
Comparison technical specifications
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| Make: | KTM | Yamaha | Yamaha | Yamaha | Kawasaki |
| Model: | 125 Sting | RD 125 | XJ 400Z-E | FJR 1300AE | KLE 650 Versys |
| Years: | 1997-99 | 1977 | 1983 | 2007 | 2009-10 |
| Engine: | Single cylinder two stroke | Two stroke, parallel twin | Four stroke, transverse four cylinder, DOHC, four valve per cylinder | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder. | Four stroke, parallel twin, DOHC, 4 valves per cylinder |
| Capacity: | 124.8 cc / 7.6 cu in | 124 cc / 7.6 cu-in | 399 cc | 1298 cc / 79.2 cu-in | 650 cc / 39.6 cu-in |
| Bore x Stroke: | 56 x 50.7 mm | 43 х 43 mm | 54 х 53.6 mm | 79 x 66.2 mm | 83 X 60mm |
| Compression Ratio: | 6.8:1 | 10.5:1 | 10.8:1 | 10.6:1 | |
| Cooling System: | Liquid cooled | Air cooled | Liquid cooled | Liquid cooled | Liquid cooled |
| Starting: | Electric | Kick | Electric | Electric | Electric |
| Max Power: | 10.1 kW / 13.5 hp @ 8400 rpm | 17 hp / 12.4 kW @ 8500 rpm | 55 hp / 41kW @ 11500 rpm | 145 hp / 105.7 kW @ 8500 rpm | 47 kW / 64 hp @ 8000 rpm |
| Max Torque: | 13.1 Nm / 1.34 kgf-m / 9.7 ft-lb @ 7500 rpm | 1.3 kgf-m @ 8000 rpm | 3.5 kgf-m / 25.3 lb-ft @ 10000 rpm | 125 Nm / 13.7kgf-m @ 6000 rpm | 61 Nm / 6,2 kgf-m @ 6800 rpm |
| Transmission: | 6 Speed | 5 Speed | 6 speed | 5 Speed Yamaha Chip-Controlled Shift (YCC-S) | 6 Speed |
| Final Drive: | Chain | Chain | Chain | Shaft | Chain |
| Front Suspension: | 43mm Upside down forks and shock | 28 mm telescopic forks | Telescopic forks | 48mm upside-down telescopic fork w/adjustable preload, compression and rebound damping; | 41 mm inverted telescopic fork with stepless (right-side) adjustable rebound damping and adjustable preload |
| Rear Suspension: | Fully adjustable White Power mono-shock | Dual rear shock pre-load adjustable | Monocross, link type | Single shock, link-type, w/adjustable preload and rebound damping; | Offset laydown single-shock with 13-way adjustable rebound damping and 7-way adjustable preload |
| Front Brakes: | Single 320 mm disc | Single240mm disc | 2x discs | 2x 320mm discs 4 piston calipers | 2x 300mm discs 2 piston calipers |
| Rear Brakes: | Single 220 mm disc | 130 mm Drum | Single disc | Single 283mm disc 2 piston caliper | Single 220mm disc 1 piston caliper |
| Front Tyre: | 110/70-17 | 2.75-18 | 90/90-18 | 120/70 ZR17 | 120/70ZR17 |
| Rear Tyre: | 130/70-17 | 3.00-18 | 110/90-18 | 180/55 ZR17 | 160/60ZR17M |
| Fuel Capacity: | 8.5 L / 2.2 US gal / 1.9 Imp gal | 11.5 Litres / 3.04 US gal | 19 Litres / 5.0 US gal | 25 Liters / 6.6 gal | 19 Litres / 5.0 gal |