Harley-Davidson 1957 XL - Sportster Engine

The first year of the Harley-Davidson XL - Sportster model, the compact overhead valves engine design is built on the KH foundations with the gearbox integrated into one piece case and accessible through trap door, this modern engine is again one of H-D masterpieces based on complex artistic castings which form elegant lines which still capture my attention today. the Carburetor is the original Linkert DC type, the 1957 Sportster engine also carry the Jubilee trumpet horn and the famous round air cleaner, the successful engine will developed later on to have higher compression and bigger displacement with many sub models bikes and competition models like the legendary XR or the special XLCR all have roots in this 58 years old engine....

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