The last type of motocross specially developed and produced in the ESO factory in Divišov, founded and led by a man of many talents, Mr. Jaroslav Simandl, until the fateful political intervention in 1964, which meant the renaming of the factory and its products to the JAWA brand and the end of the motocross production in Divišov.

The unique feature of the motorcycle and the developmental leap from the previous "motocross" from Divišov is especially the progressive double conception of the thin-walled tube frame with an oil tank consisting of interconnected frame tube cavities. Tensioning of the secondary gear is designed in an unusual manner on a pivot of the swinging fork by means of a set of duralumin eccentric elements. The engine intake is fitted with a pair of filters in a riveted aluminium housing, also covered with aluminium side panels with integrated number plates. This type of chassis was most often powered by a long-stroke 500 ccm engine.

We produce and maintain the following spare parts for this machine: