Max decided that sending scout teams out on motorcycles was going to be a necessary upgrade. After the flood washed away so much in the area the area they needed to watch was much larger, owing to the lack of hiding spots. That meant more mobility was needed in order to maintain security.
They are a standard part of most nation's infantry kit, though the 111th was all out of them by the time they arrived on this planet.
Fortunately for them, their kind and generous Cygnus Drop Master benefactors had bequeathed them a massive supply of infantry equipment, which included a number of the electric powered scout bikes. They could be solar charged slowly, or quick charged from a Mecha, and were assembled from their transport crate in minutes.