According to Official Guinness Records,
The fastest speed in a streamlined three-wheeled electric motorcycle is 387.32 km/h (240.72 mph) and was achieved by Eva Håkansson (Sweden) riding the KillaJoule at the Bonneville Salt Flats, Utah, USA, on 28 August 2014. Eva designed and built KillaJoule - she has a master’s degree in mechanical engineering and is working towards a PhD in the same subject. Eva hopes her record will show that eco-friendly vehicles can be fast and exciting, and that "women can be excellent engineers".
For a complete list of 2014 records, please visit 2014 Guinness Records in United States.