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This paper describes the design and features of a new-type data acquisition system for racing motorcycles. With the technological advances of developments and measurements of the racing motorcycles, the functions of the system needed to be enhanced to incorporate the following: to extend number and type of input signals, to efficiently compare the large amount of data which were acquired in different test conditions, to annotate measured data with test conditions and rider comments, to operate simply and easily from the measurement to the analysis, and to have compact and light on-board hardware to ensure competitive riding. The integrated data acquisition system was newly developed with consideration of these requirements. The new system is composed of an onboard system, a remote data-analyzer which is a personal computer with customized software, and a remote data-buffer. The on-board system is composed of a core-module and function-modules.

Gear shift feeling is often an important factor which appeals to motorcycle riders. Therefore, it is important for designers to create a pleasant gear shift feeling when developing a motorcycle. Sensory evaluation tests are indispensable for quantifying the gear shift feeling, but are very difficult to conduct with an actual motorcycle. Therefore, we developed a simulator dedicated to sensory evaluation tests, used it to conduct sensory evaluation tests, and thus clarified the relationship between the physical amount of gear shift properties and gear shift feeling. This paper describes the development of the simulator, the sensory evaluation tests conducted on gear shift feeling using the simulator, and the results of analysis.