Harley-Davidson Harley Davidson FXDF Dyna Fat Bob (2008) vs Harley-Davidson Harley Davidson XLS 1000 Roadster 25th Anniversary XLS (1982) vs Yamaha XT 660X (2005)
Comparison technical specifications
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| Make: | Harley-Davidson | Harley-Davidson | Yamaha |
| Model: | Harley Davidson FXDF Dyna Fat Bob | Harley Davidson XLS 1000 Roadster 25th Anniversary XLS | XT 660X |
| Years: | 2008 | 1982 | 2005 |
| Engine: | Four stroke, 45° V-Twin, Twin Cam 96 vibration isolation-mounted Valves Pushrod-operated overhead valves; w/ hydraulic self-adjusting lifters; two valves per cylinder | Four stroke, 45° V-Twin, OHV, 2 valves per cylinder | Four stroke, single cylinder, SOHC, 4 valve |
| Capacity: | 1584 cc / 96 cu-in | 998 cc / 60.8 cu-in | 659 cc/ 40.2 cu-in |
| Bore x Stroke: | 95.3 x 111.1 mm | 81 x 96.8 mm | 100 x 84 mm |
| Cooling System: | Air cooled | Air cooled | Liquid cooled |
| Compression Ratio: | 9.2:1 | 8.8;1 | 10: 1 |
| Induction: | Electronic Sequential Port Fuel Injection (ESPFI) | 38mm Keihin carburetor | Fuel injection, 44 mm throttle body |
| Ignition: | Single-fire, non-wasted, map-controlled spark ignition | Transistorized | TCI |
| Starting: | Electric | Electric | Electric |
| Max Torque: | 124.7 Nm / 92 ft/ lbs. @ 3000 rpm | 55 ft-lb / 74 Nm @ 4000 rpm | 58.4 Nm / 5.7 kgf-m @ 5250 rpm |
| Transmission: | 6 Speed | 4 Speed | 5 Speed |
| Final Drive: | Belt | Chain | Chain |
| Frame: | Mild steel, tubular frame; rectangular section backbone; stamped, cast and forged junctions, forged fender supports; MIG welded | Single down tube cradle | Steel tubular diamond frame with dual tank rails |
| Front Suspension: | 49 mm with polished aluminum fork triple clamp and dual-rate springs | Telehydraulic forks | 43 mm Telescopic forks, |
| Rear Suspension: | Coil over shock | Dual shocks swinging arm fork | Oscillating arm standard Monocross. |
| Front Brakes: | 2x 299mm disc 4 piston caliper | 2x 254mm discs | Single 320mm disc 4 piston caliper |
| Rear Brakes: | Single 292mm disc 2 piston caliper | Single 292mm disc | Single 245mm disc 1 piston caliper |
| Front Tyre: | D427F 130/90B16 67H | MJ 90-19 | 120/700-17 |
| Rear Tyre: | D427 180/70B16 77H | MT90-16 | 160/60-17 |
| Wet Weight: | 320.0 kg / 706 lbs | 249 kg / 542 lbs | 186 kg / 410.1 lbs |
| Fuel Capacity: | 18 9 Litres / 5.0 US gal | 15 Litres / 3.9 US gal | 15 Litres / 3.9 gal |