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) vs Harley-Davidson Harley Davidson FLS Softail Slim (2016-17) vs Ducati 900SS Imola (1976)

Comparison technical specifications

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Make:	Harley-Davidson	Ducati	Harley-Davidson	Velocette	Harley-Davidson	Ducati
Model:	Harley Davidson FXDF Dyna Fat Bob	916 Senna II	Harley Davidson FLSTF Fat Boy	K series 1925-31	Harley Davidson FLS Softail Slim	900SS Imola
Years:	2012	1998	2009	1925-27	2016-17	1976
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	Four stroke, Twin Cam 103B Valves Pushrod-operated, overhead valves with hydraulic, self-adjusting lifters; two valves per cylinder	Four stroke, 90°“L”twin cylinder, SOHC, 2 valves per cylinder, bevel gear driven
Capacity:	1690 cc / 103 cu. in	916 cc / 55.9 cu in	1584 cc / 96 cu-in	348.4 cc / 21.3 cub in	1690 cc / 103.1 cub in.	864 cc / 52.7 cu in
Bore x Stroke:	98.4 x 111.3 mm	94 x 66 mm	95.25 x 111.25 mm	74 x 81 mm	98.4 x 111.1 mm	86 x 74.4 mm
Cooling System:	Air cooled	Liquid cooled	Air cooled	Air cooled	Air-cooled	Air cooled
Compression Ratio:	9.6:1	11.0:1	9.2:1	6:1	9.6:1	9.5:1
Ignition:	Single-fire, non-wasted, map-controlled spark ignition	Electronic I.A.W	Single-fire, non-wasted, map-controlled spark ignition	Bobine	Electronic	Electronic
Starting:	Electric	Electric	Electric	Kick start	Electric	Kick (electric as an option)
Transmission:	6 Speed	6 Speed	6 Speed	3 Speed	6 Speed	5 Speed
Final Drive:	Belt	Chain	Belt	Chain	Belt	Chain
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	41.3 mm telescopic, “beer can” covers	38 mm Marzocchi fork
Rear Suspension:	Coil over shock	Showa GD52-007-02, rising rate progressive linkage adjustable monoshock	Hidden, horizontal-mounted, coil-over shock	Spring loaded seat	Hidden, horizontal-mounted, coil-over	Marzocchi 310 mm dual shocks, 3-way adjustable