The value of a 1947 Harley-Davidson Knucklehead motor can vary depending on several factors, including its condition, originality, rarity, and market demand. Additionally, factors such as documentation, provenance, and any accompanying parts or accessories can also influence its value.
For a more accurate and up-to-date valuation, it is recommended to consult with vintage motorcycle experts, appraisers, or consult reputable sources such as classic motorcycle price guides or auction records to get a better understanding of the current market value for a 1947 Harley-Davidson Knucklehead motor.