Fuel X pro+ for Dominar 400 UG4 (2019-2023)Fuel X pro for Dominar 400 UG4 2019 model onwards FuelX is a state of the art electronic plug in fuel injection optimizer for modern engines. It autotunes the engine to its best operational parameters, constantly monitoring, learning and adapting to the engines condition, wear and tear, riding style, add ons (such as air filter and or exhaust), as well as the environmental conditions such as temperature, humidity, altitude etc. It always ensures that