By 1937, all Harley-Davidson flathead engines were being Geared up with dry-sump oil recirculation programs much like the one released from the "Knucklehead" OHV motor. six. Harley-Davidson reserves the proper to amend the terms in the Promotion or to withdraw the Promotion at any time if situation beyond its https://connerrbacg.blogitright.com/31301532/the-ultimate-guide-to-harley-davidson