NSU Engine ca 1905

NSU engine  ca 1905

NSU started to produce its own engines in 1904 and used the inlet-over-exhaust principle for a number of years. The inlet  valve operation system is special in that the inlet valve is forced open by a rod actuated by the exhaust valve cam. The carburettor, which is not quite complete, is NSU’s own device with its characteristic tank-top control. The engine type we offer here, with cast-iron crankcase,  was first presented for the 1905 model range and was catalogued till 1909. It was available in four sizes,  2HP,  2½ HP,  2¾ HP and 3 HP, equivalent to 70x 75 (289  cc)    75 x 75   (331 cc )  80 x 75  (376 cc ) and 80 x 80  (402 cc) bore x stroke. This engine measures 80×75 (376cc) and has been overhauled by a specialist.