The time it takes to rebuild a Harley Davidson engine can vary depending on various factors such as the specific model of the engine, the extent of the rebuild, the experience level of the person performing the rebuild, and the availability of necessary parts and tools.
A basic rebuild that involves replacing worn-out parts, such as piston rings, bearings, gaskets, and seals, can typically take anywhere from several hours to a full day, depending on the individual's familiarity with the process and their level of mechanical expertise.
In such cases, the rebuild process can span multiple days or even weeks, especially if there are delays in sourcing the required parts.
It's important to note that rebuilding an engine requires technical skill and knowledge, so it's often recommended to consult a professional mechanic or an experienced Harley Davidson specialist to ensure the job is done correctly and to avoid potential complications.