/5 series 1969 - 1973

BMW offered three models in the /5 series, the primary variations in the models being the cylinder displacements. Actual displacement is 498cc for the R50/5, 599cc for the R60/5, and 745cc for the R75/5. The R75/5 was the first machine of that displacement offered by BMW since the end of World War II. Outwardly the three models are almost completely identical. Curb weight according to the 1973 owner's manual is 412 pounds for the R50/5 and 423 pounds for the R60/5 and R75/5 (less fuel). On the two larger displacement machines an electric starter motor is a standard feature; on the R50/5 it is optional. Concentric float carburetors are featured on the R50/5 and R60/5. The R75/5 uses constant vacuum (CV) carburetors with a 32mm choke. Bing is the manufacturer of both types.

My BMW R60/5 (1972-3)

The BMW R60/5 was first introduced to the general public in 1969 - Here are pictures of my R60/5

The R60 slash 5 was a 600cc horizontally opposed twin cylinder model equipped with dry plate clutch, Bing slide-type carburetors with 26mm throats and a 4 speed gearbox.

BMW R60/5

All slash 5 models were air-cooled, four-cycle, horizontally opposed-twin (boxer) engines with hemispherical combustion chambers. Their engine housings are one-piece tunnels housings. The camshaft, driven by a duplex chain, runs at half engine speed and is located below the crankshaft. Valves are actuated by the camshaft through hardened followers, push rods, and rocker arms.

Video about the "new" R75/5 and R90S BMW