By 1937, all Harley-Davidson flathead engines were being Outfitted with dry-sump oil recirculation units similar to the just one introduced while in the "Knucklehead" OHV motor. This determination indicates that there are no severe contamination problems at the power. Beneath the new One particular Cleanup Method, Harley, EPA, and https://harley-davidson77666.blogzag.com/75333315/5-simple-statements-about-harley-davidson-explained