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Presentation of “RTL250F” Four-stroke Engine Trials Motorcycle

Article of Honda R&D Technical Review Vol.17 No.1

Summary

The RTL250F has a compact and lightweight 249 cm3, water-cooled, 4-stroke engine. As the world’s first off-road motorcycle with a batteryless electronically controlled fuel injection system (hereinafter referred to as batteryless PGM-FI system), the RTL250F has obtained the same or better racing performance than the RTL250R with a 2-stroke engine. Furthermore, the RTL250F motorcycle employs a kick-starter for engine ignition. The batteryless PGM-FI system utilizes a lower cost ECU (Engine Control Unit) integrated throttle body developed for small motorcycles. A control system was developed to obtain the drivability and usability required by a trials motorcycle. As a result, a commercially available trials motorcycle with a 4-stroke engine has been realized. This trials motorcycle has shown competitive performance for the World Championship Trials.

Reference

(1) Shimada, N., Akamatsu, S., Ueda, M., Hayashi, A., Hirakata, Y.: Development of an ECU Integrated Throttle Body System Module for Compact Fuel Injection System Used in Small Motorcycles and Scooters, Honda R&D Technical Review, Vol. 15, No. 1, p. 83-88

Author (organization or company)

Toshinao TAKIGAWA(Asaka R&D Center)、Eiichi ISHIKAWA(Asaka R&D Center)、Hiroyuki KAKINUMA(Asaka R&D Center)、Fuyuki KOBAYASHI (Asaka R&D Center)

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