BMW R12 and R17
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The BMW R12 and R17 are flat-twin engine motorcycles made by BMW Motorrad from 1935 through 1942. They were developed in 1935 based on the R7 concept of 1934. A few hundred R17s were made, ending in 1937, while the R12 continued through 1942, with... Wikipedia
Top speed: 110 km (68 mi) - 120 km (75 mi)
Bore / stroke: 78 mm × 78 mm (3.1 in × 3.1 in)
Dimensions: L: 210 cm (83 in); W: 90 cm (35 in); H: 94 cm (37 in)
Engine: 745 cc (45.5 cu in) Side-valve 4-stroke flat twin, Overhead valve 4-stroke flat twin
Fuel capacity: 14 L (3.1 imp gal; 3.7 US gal)
Fuel consumption: 3.5–4 litres per 100 kilometres (81–71 mpg‑imp; 67–59 mpg‑US)
Power: 18 hp (13 kW)