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This paper presents a racing bike with electrical drive train, which shall be used as a prototype of a future electro racing class and as well as a test bed for future driving performance and sound tests. All major components of the drive train including motor, battery, battery controller and wiring are described in detail. Safety issues related to the selection of the voltage level are discussed. The mechanical integration of the electrical drive train into a given racing bike is presented. Moreover, power and torque characteristics of the motor and the total weight of the motorcycle are put into relation to performance requirements of the racing class in question. The electric drive train has a modular design and can be simplified compared to internal combustion engines, because of the favorable torque characteristic of electric motors a gearbox is not necessary. Sound issues of both, the conventional racing bike and the electrically powered one are discussed.

Air-boxes as a part of the intake system of small engines especially for motorcycles create a specific noise radiation. Simulation methods and experimental investigations to analyse and predict the acoustical behaviour of air-boxes for motorcycles are required in order to pass current noise control legislation and to achieve a pleasant sound. This paper presents the design of a test bench for the investigation of air-boxes for motorcycles. The test bench is equipped with measurement systems for monitoring and recording volumetric flow, speed, pressure data and sound data. The sound radiated from the air-box is produced by the pulse flow in the engine induction system. The investigation of the air-box sound at real engine operation is impossible because of the noise produced by the engine. The created gas exchange system is distinguished by a rotating disc with a cut-out section, which opens and closes a pipe instead of the valves in the real engine.