Harley Engines - Please scroll below to browse the Harley motors and parts currently listed.

It is interesting to note that the engine in the first Harley had just a seven cubic inch displacement and was so weak that the rider needed to assist with pedaling to conquer even a modest incline.

With the help of outboard engine pioneer Ole Evinrude the second engine was a little more powerful and had a cubic inch displacement of about twenty five inches.

Later Versions of the Harley V-Twin Engine

Intake Over Exhaust - Also known as the F-head, this early version of the V-twin had intake valves that operated on vacuum, not mechanically as they do today.

The Flat Head - Valves on these engines were positioned at the side of the cylinder and not over it.

Continued after listings...

The Knucklehead Engine - This was the companies first overhead valve V-Twin engine produced between 1936 and 1947 that got it's name from the design of the valve cover that looked they had knuckles on them.

The Panhead - The Panhead, given it's name because the valve covers which looked like pans, had aluminum heads, hydraulic valve lifters and an electric starter which was a welcome feature to all the Harley enthusiasts who had sore legs from kick starting the bigger V-Twin engines. These motors were

produced from 1948 to 1965.

The Shovelhead - Manufactured from 1966 to 1984 and once again named after the appearance of the valve covers which this time looked like the head of an upside-down shovel, the engine came in 74 cubic inch displacement which was later replaced with an 80 inch version.

The Evolution - Produced between 1984 and 1999 and known by Harley enthusiasts as the "Evo," this engine, this motorcycle power plant had nearly 82 cubic inches and produced 70 horsepower. This engine burns less oil and is more reliable than prior engine models which did not go over well with the more die-hard Harley enthusiasts. Smaller versions of this engine are still being produced today.

Twin Cam 88 Engines - This engine which began production in 1999 gets it's name by having two camshafts instead on just one.

Revolution Engine - Harley Davidson's most resent engine which is water cooled, has dual overhead camshafts and puts out a whopping 115 horsepower.

Filed under: Harley Engines