1926 Harley Davidson “Single” Update Posted by Highway Classics on May 15, 2019 Posted in: Uncategorized. Here are some photos showing the engine teardown on the 1926 – more updates to come as we move along. Posts navigation ← S.M. “Whitey” Caldwell’s 1926 Harley Davidson “Single” Dave’s 1936 Knucklehead Engine Start →