The BMW R60-5 was produced in Berlin from 1969 to 1973 and was their top produced motorcycle of the decade. The engine is built around a one-piece tunnel crank-case. The camshaft is driven by a duplex chain and is located below the crankshaft. The reversed arrangement improves ground clearance for the same center of gravity and assists lubrication of the camshaft. Valves are actuated by the camshaft through hardened followers, push rods, and rocker arms. This motorcycle was part of an extensive collection from an Alaska ship Captain out of Caldwell, ID.