Here’s a look at the technical elements and developments that allowed the 80-cu.-in. – Evo (Evolution) Sportster: 1986 – Present. The Harley-Davidson Evolution V-twin was introduced in 1983. This engine was found only in XL models (a.k.a Sportsters) – 45 (Flathead): produced from 1929 to 1973 (not to be confused with the Big Twin Flathead) In the 'Everything Else' category you're going to find the following players: This engine is not to be confused with the Sportster Evo – same name, different engine) – Blockhead, 1984-99 (All Blockheads have the same displacement of 80 cubic inches they are also called Evolution or Evo. Suburban Motors Harley-Davidson® located in Thiensville, Wisconsin, features a large inventory of new & pre-owned Harley-Davidson motorcycles, parts, and MotorClothes as well as offering financing, service, and riding courses.
– Shovelhead, 1966-84 (74 cubic inches later 80 cubic inches) (First 61 cubic inches later 74 cubic inches) – Knucklehead, 1936-47 (61 cubic inches later 74 cubic inches) This engine came as a replacement for the Shovelhead engine till the year 2000. This engine which is 45-degree air cooled came into the market by the year 1984. – Flathead 1930-1948 (74 cubic inches later the displacement was increased to 80 cubic inches) The Harley Davidson EVO Crate Motor Basically, the Harley Davidson EVO Crate Motor which is commonly known as Evo is a V-twin engine which is manufactured by HD Company for its popular bikes. At one time, Harley had used gear driven cams, but to cut down on noise, reverted to a silent timing chain setup as used in many car engines. Big Twin Harleys have separate transmission assemblies (the gearbox and the engine use different lubricants, allowing for extensive work to be done to the gearbox without splitting the engine cases) and left side final drive.Ĭheck Out The Differences Between Custom Motorcycles Often referred to as the Achilles Heel of the Twin Cam engine are the spring loaded cam chain tensioners on pre-2007 models. There are two main Harley groups: Big Twins and Everything Else. At the time, knowing the differences between power plants allowed you to know what model the bike originally started life as. Most old Harleys ended up getting chopped by veterans that came back from World War 2. As a result, they provide excellent low and mid-range performance with. It became a practice among motorcycle aficionados. 14-time Brute Horsepower Shoot-Out winner Cycle-Rama's line of cams are designed especially for 2007 and later Twin Cam & Milwaukee Eight engines, Cycle-Rama cams utilize specially designed proprietary ramps to increase flow velocity and maximize cylinder fill. Also, the shape of the rocker box covers usually gave the model’s nickname. Harleys from the old days were not so different from one another, and the models were often just referred to by their power plant.
HARLEY EVO CAMSHAFT IMAGES HOW TO
In today's article, we're going to offer a short guide on how to tell the difference between different Harley-Davidson engines.įirst of all, you need to know that Harley-Davidson models were commonly known by the name of the power plants the respective bikes were using. If you hang around bikers, especially around fans of the cruiser style, you will hear terms like 'Panhead' and ‘Knucklehead' without knowing their meaning.
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