According to Official Guinness Records,
The longest journey on a pocketbike (minimoto) is 2,504.77 km (1,556.39 mi) achieved by Sigríður Ýr Unnarsdòttir (Iceland), Michael Reid, and Chris Fabre (both USA) starting in Ohio and ending in New Mexico, USA from 5 - 17 September 2016.Sigríður, Michael, and Chris traveled from Middletown, Ohio to Ruidoso, New Mexico for this attempt.
For a complete list of 2016 records, please visit 2016 Guinness Records in United States.