Harley-Davidson Harley Davidson FXDF Dyna Fat Bob (2012) vs Ducati 916 Senna II (1998) vs Harley-Davidson Harley Davidson FLSTF Fat Boy (2009) vs Velocette K series 1925-31 (1925-27)
Comparison technical specifications
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| Make: | Harley-Davidson | Ducati | Harley-Davidson | Velocette |
| Model: | Harley Davidson FXDF Dyna Fat Bob | 916 Senna II | Harley Davidson FLSTF Fat Boy | K series 1925-31 |
| Years: | 2012 | 1998 | 2009 | 1925-27 |
| Engine: | Four stroke, V-Twin, Twin Cam 103™ with integrated oil cooler | Four stroke, 90° “L” twin cylinder, DOHC, desmodromic 4 valve per cylinder, belt driven | Four stroke, Twin Cam 96BTM Valves Pushrod-operated, overhead valves with hydraulic, self-adjusting lifters; two valves per cylinder | Four stroke, single cylinder, OHC |
| Capacity: | 1690 cc / 103 cu. in | 916 cc / 55.9 cu in | 1584 cc / 96 cu-in | 348.4 cc / 21.3 cub in |
| Bore x Stroke: | 98.4 x 111.3 mm | 94 x 66 mm | 95.25 x 111.25 mm | 74 x 81 mm |
| Cooling System: | Air cooled | Liquid cooled | Air cooled | Air cooled |
| Compression Ratio: | 9.6:1 | 11.0:1 | 9.2:1 | 6:1 |
| Ignition: | Single-fire, non-wasted, map-controlled spark ignition | Electronic I.A.W | Single-fire, non-wasted, map-controlled spark ignition | Bobine |
| Starting: | Electric | Electric | Electric | Kick start |
| Clutch: | Multi-plate, wet | Dry, multiplate | Multi-plate, wet | Wet, multi-plate |
| Transmission: | 6 Speed | 6 Speed | 6 Speed | 3 Speed |
| Final Drive: | Belt | Chain | Belt | Chain |
| Frame: | Mild steel, tubular frame; rectangular section backbone; stamped, cast and forged junctions, forged fender supports; MIG welded | Steel, Trellis frame | Mild steel, tubular frame; rectangular section backbone; stamped, cast and forged junctions, forged fender supports; MIG welded | Open frame with load bearing motor to form part of the frame |
| Front Suspension: | 49 mm with polished aluminum fork triple clamp and dual-rate springs, | 43 mm Adjustable Showa GD051 inverted fork | 41.3 mm telescopic, chrome dust covers | Webb fork with two friction dampers |
| Rear Suspension: | Coil over shock | Showa GD52-007-02, rising rate progressive linkage adjustable monoshock | Hidden, horizontal-mounted, coil-over shock | Spring loaded seat |
| Front Tyre: | 130/90B16 67 | 120/70 ZR17 | 140/75R17 | 3.00 x 19" |
| Rear Tyre: | 180/70B16 77H | 190/50 ZR17 or 180/55 ZR17 | 200/55R17 | 3.00 x 19" |