The Shovelhead engine is a motorcycle engine that was produced by Harley-Davidson from to , built as a successor to the previous Panhead engine. When the engine was first produced, the Shovelhead had a shallower combustion chamber, larger valve drop for both intake and exhaust, better porting, and stronger valves and pistons. This gave the new engine an extra 10 horsepower, along with a different appearance. The Shovelhead engine was created as the previous Panhead engine was becoming obsolete, with many Harley-Davidson owners demanding more power to compete with the more modern motorcycles. The engines had only 10 fins for cooling, which caused them to run hot. Another problem was that oil would pool in the cylinder heads, causing it to leak into the valves and burn oil.
Harley Davidson Dyna Glide: Engine Noise Diagnostic Guide
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When Harley-Davidson bolted their new overhead-valve motor to the K-Model frame in , the Sportster legend began. The cc displacement advertised as cc was derived from a 3. Both connecting rods shared a common crank pin, referred to as a 'knife and fork' design. Each valve was operated by its own cam, simplifying valve train geometry.
Harley-Davidson Shovelhead engine
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Bob began by bolting up a set of torque plates to the Axtell cylinders. He then used a bore gauge to accurately measure the cylinder bore; it measured 3. Axtell included a set of JE pistons and gaskets with the cylinders. The pistons came complete with wrist pins, locks, and a full set of rings.