'E' model variation Harley-Davidsons were produced in 1912 and 1918. They were both twin cylinder 60.34 cu. in. bikes. However the 1912 Model X8E was a belt drive whereas the 1918 Model 18E was a twin-chain drive.
During the same production years there were also A,C,D and E variations. Their features are as follows:
|A||1909-1914||5,6,7,8,9,10||Single||30.2 ci||battery ignition||28"|
|C||1909-1918||5,6,7,10,11,16,17,18||Single||30.2 ci||battery ignition||26"|
|E||1912 & 18||X8E, 18E||Twin||60.34 ci||magneto|
The Harley Davidson Motor Company by David Wright.
Standard Catalog of American Motorcycles 1898-1981 by Jerry Hatfield