The sidecar bike shown is the IMZ-Ural built by the Russians and it is a direct copy of the German BMW R75 powered sidecar motorcycle, admired and needed by the Russians. The "Urals", as they became know due to the plant being moved into the Ural mountains for protection from the Germans, had similar motor specifications to the BMW. Power was in the 25 hp range, adequate for transporting up to half a ton of rider and gear due to the low and multi-greared transmission gearbox. These bikes were extremely useful and successful for the Russians. FWIW