Yamaha TW 125 (1999-00) vs Kawasaki KLX 300R (2000-03) vs Harley-Davidson Harley Davidson VRSCDX Night Rod Special (2013) vs Kawasaki ZX-6R Ninja (2021)
Comparison technical specifications
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| Make: | Yamaha | Kawasaki | Harley-Davidson | Kawasaki |
| Model: | TW 125 | KLX 300R | Harley Davidson VRSCDX Night Rod Special | ZX-6R Ninja |
| Years: | 1999-00 | 2000-03 | 2013 | 2021 |
| Engine: | Four stroke. single cylinder. | Four stroke, single cylinder, DOHC, 4 valve | Four stroke, 60° V-twin, DOHC, 4 valve per cylinder. | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder |
| Capacity: | 124 cc / 7.6 cu-in | 292 cc / 17.9 cu-in | 1247 cc / 76.1 cu in | 636 cc / 38.8 cub in |
| Bore x Stroke: | 57 x 48.8 mm | 78 x 61.2 mm | 105 x 72 mm | 67.0 x 45.1mm |
| Cooling System: | Air cooled | Liquid cooled, 50% distilled water & 50% ethylene glycol base antifreeze | Liquid cooled | Liquid cooled |
| Compression Ratio: | 10.0:1 | 11.0:1 | 11.5;1 | 12.9:1 |
| Induction: | TEIKEI Y24P/1 | Keihin CVK34, constant velocity, diaphragm | Electronic Sequential Port Fuel Injection | DFI with four 38mm Keihin throttle bodies and oval sub-throttles |
| Ignition: | CDI | Digital CDI | Digital CDI | TCBI with digital advance |
| Starting: | Electric | Kick | Electric | Electric |
| Max Power: | 11.8 hp / 8.6 kW @ 9000 rpm | 33 hp / 24.1 kW @ 8500 rpm | 123 hp / 90.5 kW @ 8000 rpm | NA |
| Max Torque: | 9.7Nm / 7.2 lb-ft @ 8000m rpm | 28.4 Nm @ 7500 rpm | 116 Nm / 86 ft. lbs@ 7250 rpm | NA |
| Transmission: | 5 Speed | 6 Speed | 5 Speed | 6 Speed |
| Final Drive: | Chain | Chain, 520, O-ring, 14-tooth front, 50-tooth rear | Belt | 520 series X-ring chain |
| Front Suspension: | Telescopic forks | 43mm inverted cartridge fork, 20-way compression damping | Huge 49mm telescopic forks | 41mm inverted Showa BP-SFF fork with top-out springs, stepless compression and rebound damping, adjustable spring preload |
| Rear Suspension: | Monoshock | Single shock, 20-way compression damping and 18-way rebound damping | Dual coil over adjustable shock | Bottom-link Uni-Trak with gas-charged shock, top-out spring and pillow ball upper mount, stepless compression damping, 25-way adjustable rebound damping, fully adjustable spring preload |
| Front Brakes: | Single 220mm disc | Single 250mm disc 2 piston caliper | 2x 300mm discs 4 piston calipers | 2 x 310mm petal rotors with dual radial-mount, Nissin four-piston, monobloc calipers and available KIBS ABS |
| Rear Brakes: | 130mm Drum | Single 220mm disc 1 piston caliper | Single 300mm disc 4 piston caliper | Single 220mm petal rotor with single-piston caliper and KIBS ABS |
| Front Tyre: | 130/80-16 | 80/100-21 | 120/70ZR-19 60W | 120/70 ZR17 |
| Rear Tyre: | 180/80-14 | 100/100-18 | 240/40R-18 79V | 180/55 ZR17 |
| Wheelbase: | 1,280 mm / 50.4 in | 1435 mm / 56.5 in | 1705 mm / 67 in | 1400 mm / 55.1 in |
| Seat Height: | 805 mm / 31.7 in | 924.5 mm / 36.4 in | Laden 650 mm / 25.6 in Unladen .678 mm / 26.7 in | 830.5 mm / 32.7 in |
| Fuel Capacity: | 7 Litres / 1.9 US gal | 10 Litres / 2.6 US gal | 18.9 Litres / 5.0 US gal | 17 Litres 4.5 US gal |