HARLEY-DAVIDSON HISTORY
William Harley joined with Arthur and Walter Davidson to construct the first Harley-Davidson motorcycle, which was finally rolled out in 1903. There was really no cutting-edge technology in the design, as they had simply brought together a single-cylinder engine (based on a DeDion design) and a tube-type bicycle frame. Painted in gloss black, that first machine was admired by friends and family-and that's where things started to get interesting.
Harleys 1st V-Twin
1909-1911
The trademark 45 degree V-Twin engine, introduced in 1909, displaced 49.5 cu in and produced seven horsepower		 F-head
1911-1929
 Flathead
1929-1936
The Flathead was named because of the telltale flat vented tops that are recognizable at the top of each cylinder head (45 cu. in.).		 Knucklehead
1936-1947
Harley-Davidson wasted no time building momentum out of the depression, introducing its EL model, featuring the 61 cu in. overhead valve engine, also known as the 		Panhead
1948-1965
New features are added to the 61 and 74 overhead valve engines, including aluminum heads and hydraulic valve lifters that supplied oil through rocker arms, the panhead hit the market in 1948, named for the pan-like cover where the knuckles used to be.
Shovelhead
1966-1985
By 1966 the Panhead underwent still more improvements, the most noticeable being the distinctive enclosed cylinder head in a sleek, slightly curved top. At a glance this looks unmistakably like a shovel with the pushrods resembling the handle of a shovel, and the head, the shovel itself.		 Evolution
1984-1999
In 1984 on the heels of a bold employee buyout of AMF, The motor company went public and introduced it's now famous redesign of the v-twin. This radical new design utilized styled square blocks to house the valves. 4-Cycle, 45 Degree V-Type, 1340cc, 80cu compression: 8.5:1, Oil-bath diaphragm clutch and electronic ignition.		 Twin Cam 88"
1999-2006
With numerous American motorcycle manufacturers trying to surface and re-surface Harley-Davidson introduces it's most revolutionary engine yet. The Twin Cam 88TM gets its name from its two cams. 1450cc		 Twin 96"
2007-Present
Twin 96 cu. in. Compression 9:2:1. EFI		  
 
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