

The evolution engine was designed to guarantee durability and reliability. Luckily, the evolution engine proved to be a success. The little profit Harley made in the 70s drove the company to design a progressive engine that could stand a chance against the competition. It took nearly 7 years to develop and saved Harley from demise.

The evolution engine was manufactured from 1984 through 1999. It is an air-cooled, 45-degree, V-twin engine with a displacement of 1,340 cubic centimeters (approximately 80 cubic inches). The evolution engine is one of the most iconic engines created by Harley.
