Harley-Davidson Harley Davidson FLSTC 1340 Heritage Softail Classic (1986-) vs Aprilia ETX 350 (1987-88) vs Kawasaki ER-6f (2007) vs Kawasaki Ninja 250R (2013-14)
Comparison technical specifications
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| Make: | Harley-Davidson | Aprilia | Kawasaki | Kawasaki |
| Model: | Harley Davidson FLSTC 1340 Heritage Softail Classic | ETX 350 | ER-6f | Ninja 250R |
| Years: | 1986- | 1987-88 | 2007 | 2013-14 |
| Engine: | Four stroke, 45° V-Twin, OHV, 2 valves per cylinder. | Four stroke, single cylinder, 4 valves, OHC | Four stroke, parallel twin, DOHC, 4 valves per cylinder. | Four stroke . parallel twin, DOHC, 4 valve per cylinder |
| Capacity: | 1337 cc / 81.5 cu-in | 349.2 cc / 21.3 cu in | 649 cc / 39.6 cu-in | 248 cc / 15.1 cu-in |
| Bore x Stroke: | 88.8 x 108 mm | 79.5 x 70.4 mm | 83 X 60mm | 62 х 41.2mm |
| Cooling System: | Air cooled | Air cooled | Liquid cooled, | Liquid cooled |
| Compression Ratio: | 8.5:1 | 9.6:1 | 11.3;1 | 11.6:1 |
| Starting: | Electric | Electric | Electric | Electric |
| Max Power: | 67 hp / 48.9 kW @ 6000 rpm | 19.4 kW / 26 hp @ 7500 rpm | 53 kW / 72.1 hp @ 8500 rpm | 29.9 hp / 22 kW @ 10500 rpm |
| Max Torque: | 97 Nm / 71.5 lb-ft @ 2350 rpm | 28.4 Nm / 2.9 kgf-m / 20.9 lb-ft @ 6000 rpm | 66 Nm / 6.7 m-kg @ 7000 rpm | 21.7 Nm / 2.21 kgf-m / 16.0 lb-ft @ 10000 rpm |
| Transmission: | 5 Speed | 5 Speed | 6 Speed | 6 Speed |
| Final Drive: | Belt | Chain | Chain | O-ring chain |
| Front Suspension: | Telescopic forks | Hydraulic telescopic front fork | 41 mm telescopic fork, | 37mm hydraulic telescopic fork |
| Rear Suspension: | Dual shocks | Swingarm with single shock absorber. | Offset laydown single-shock with adjustable preload, | Uni-Trak® with aluminum linkage |
| Front Brakes: | Single 292mm disc | Single disc | 2x 300mm discs 2 piston calipers | Single 260mm hydraulic petal disc 2 piston caliper |
| Rear Brakes: | Single 292mm disc | Single disc | Single 220mm disc 1 piston caliper | Single 220mm petal disc 2 piston caliper |
| Front Tyre: | 140/90-16 | 90/90-21 | 120/70ZR17 | 110/70-17 |
| Rear Tyre: | 140/90-16 | 130/80-17 | 160/60ZR17 | 130/70-17 |
| Fuel Capacity: | 16 Litres / 4.2 US gal | 13 Litres / 3.4 US gal | 15.5 Litres / 4.1 US gal | 17 Litres / 4.4 US gal |