1. Home
  2. Honda R&D Technical Review Vol.17 N...
  3. Presentation of “RTL250F” Four-stro...

Technical Review e-Book: Summary

Presentation of “RTL250F” Four-stroke Engine Trials Motorcycle

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


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.


(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)

We would like to get your opinion on this research paper. (This is only applicable to registered members.)

The readers of this research paper have also selected these research papers.

Introduction of CRF450R Equipped with 4-Stroke Engine
Article of Honda R&D Technical Review Vol.14 No.1
2007 Model CBR1000RRW for Suzuka 8 hours World Endurance Championship Race
Article of Honda R&D Technical Review Vol.20 No.1
Presentation of RC211V Equipped with 4-Stroke Engine
Article of Honda R&D Technical Review Vol.15 No.2