By 1937, all Harley-Davidson flathead engines were being equipped with dry-sump oil recirculation systems much like the 1 introduced while in the "Knucklehead" OHV motor. 6. Harley-Davidson reserves the correct to amend the phrases of the Advertising or to withdraw the Promotion at any time if instances further than https://johnnymcpz345.pointblog.net/5-simple-techniques-for-harley-davidson-73482959