Harley-Davidson Harley Davidson FXSTSB Bad Boy (1995-96) vs KTM 790 Duke The Scalpel (2018) vs Yamaha XVS 650 V-Star Silverado (2005-06)
Comparison technical specifications
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| Make: | Harley-Davidson | KTM | Yamaha |
| Model: | Harley Davidson FXSTSB Bad Boy | 790 Duke The Scalpel | XVS 650 V-Star Silverado |
| Years: | 1995-96 | 2018 | 2005-06 |
| Engine: | Four stroke, 45° V-Twin, OHV, 2 valves per cylinder. | Four stroke, parallel twin cylinder, DOHC, 4 valve per cylinder | Four stroke, 70°V-twin cylinder, SOHC, 2 valve per cylinder |
| Capacity: | 1337 cc / 81.5 cu-in | 799 cc / 48.7 cu-in | 649 cc / 39.6 cu-in |
| Bore x Stroke: | 88.8 x 108.0 mm | 88 mm x 65.7 mm | 81 x 63mm |
| Cooling System: | Air cooled | Liquid cooled | Air cooled |
| Compression Ratio: | 8.5:1 | 12.7:1 | 9.0:1 |
| Induction: | 40mm Keihin CV carburetor | DellOrto fuel-Injection | 2x 28mm Mikuni BDS28 CV carburetors |
| Ignition: | Single-fire, non-wasted, map-controlled spark ignition | Bosch EMS with RBW | Digital TCI |
| Starting: | Electric | Electric | Electric |
| Max Power: | 58 hp / 42.3 kW @ 5000 rpm | 78 kW / 105 hp @ 9000 rpm | 40 hp / 29.2 kW @ 6500 rpm |
| Max Torque: | 90.8 Nm / 67 lb.-ft. @ 3600 rpm | 87 Nm / 63.4 lb-ft @ 8,000 rpm | 50.9 Nm / 37.5 lb-ft @ 3000 rpm |
| Transmission: | 5 Speed | 6 Speed | 5 Speed |
| Final Drive: | Belt | Chain 520 X-Ring | Shaft |
| Front Suspension: | 39mm stanchions | 43mm WP upside-down | 41mm forks |
| Rear Suspension: | Dual dampers, able for preload | WP shock absorber with preload adjuster | Adjustable link Monocross |
| Front Brakes: | 2x 292mm discs 1 piston caliper | 2x 300mm discs | Single 298mm disc |
| Rear Brakes: | Single 292mm disc | Single 240mm disc | 200mm Drum |
| Front Tyre: | 100/90-19 | Maxxis Supermaxx ST 170/20Z R17 | 130/90-16 |
| Rear Tyre: | 130/90 HB16 | Maxxis Supermaxx ST 182/20Z R17 | 170/80-15 |
| Seat Height: | 637 mm / 25.0 in | 825 mm / 32.4 in | 710 mm |
| Dry Weight: | 281 kg / 320 lbs | 169 kg / 372.5 lbs | 229 kg |
| Fuel Capacity: | 15.9 Litres / 4.2 US gal | 14 Litres / 3.7 US gal | 16 Liters / 4.2 US gal |