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The Panhead is an overhead-valve Harley-Davidson motorcycle engine, so nicknamed because the rocker covers resembled cooking pans. The engine is a two-cylinder, two-valve-per-cylinder, pushrod V-twin, made in both 61 c.i. (EL) and 74 c.i. (FL, FLH) displacements.
As such, push-rod suspension systems allow for much greater high-speed stability, much lower levels of body-roll, and a much lower centre of gravity for the vehicle. [7] For pull-rod suspension systems, the only difference is the orientation of the rocker arms. In a push-rod system, the rocker arms are placed at the highest point in the assembly.
The engine is a two-cylinder, 45 degree, pushrod actuated overhead valve V-twin engine with two valves per cylinder. It was the third basic type of V-Twin engine used by Harley-Davidson, replacing the Flathead-engined VL model in 1936 as HD's top-of-the-line model. The engine was manufactured until 1947 and was replaced by the Panhead engine in ...
The VRSC was introduced in 2001 in a single model called the V-Rod aiming to compete against Japanese and American muscle bikes. The V-Rod's Revolution engine was developed for road use by Porsche Engineering with the aid of a few Harley-Davidson engineers [6] [7] [8] from Harley-Davidson's VR1000 V-twin racing bike engine.
The opposite arrangement, a "pull rod", will pull on the rod during bump travel, and the rod must be attached to the top of the upright, angled downward. Locating the spring and damper inboard increases the total mass of the suspension, but reduces the unsprung mass , and also allows the designer to make the suspension more aerodynamic.
An overhead valve engine, abbreviated (OHV) and sometimes called a pushrod engine, is a piston engine whose valves are located in the cylinder head above the combustion chamber. This contrasts with flathead (or "sidevalve") engines , where the valves were located below the combustion chamber in the engine block .