MATERIAL ANALYSIS OF THE ENGINE PART FOR THE HISTORICAL MOTORCYCLE JAWA 250, 1939

This article deals with the chemical composition of the engine part mounted on the historical motorcycle JAWA 250 from 1939. Before the company started making motorcycles, it was engaged in the production of firearms. It was an arms industry, and this also entailed high demands on the quality of the products, which can be observed not only on aluminum alloy castings but also on other parts of the motorcycle. The part under review is made of aluminum alloy and serves as a holder for the motorcycle ignition mechanism. It is one of many parts of the engine. There are several reasons for material analysis. The motorcycle was restored, and it was important to find out what material our ancestors used to produce the parts of the motorcycle. The measurement result can be used to produce a new part if necessary, which will be possible to replace either the missing part or the part in an already unrepairable state. The issues concerning the production of spare parts for historical means of transport or technical monuments are generally very extensive. Production processes and materials must be observed. For this reason, material analysis is of great importance and in the future, we will not be able to avoid it in the process of cultural technical monuments restoration. The information found may assist restorers to manufacture or repair of damaged parts. There were more types of JAWA motorcycles produced in the interwar period and the results of this research can be also applied in general.