Well there are the following classes for movement:
Inftry (Infantry)
Bzka (Mechs)
Tire A (Tires Group A)
Tire B (Tires Group B)
Tank (Threads Likely)
Air (Airplanes and Copters)
Ship (Naval Units)
Trpt (Transport Units like the Lander/APC/T-copter)
I'll note the now two grouping of tires (don't remember that) and the separate grouping for transport vehicles. The Tires A and B is likely where they could bin Recons/Motorcycles in a different group than say missiles.
In other words recons (essentially jeeps) might be able to make it though forests a little better now... here's hoping.
Extra note: Cities list a G * N * A for Recovery with "G" Highlighted. Obviously they stand for recovery of ground, naval, and air units. However the use of a reference may mean that there are properties that can recover multiple types.
Edit: I just found a shot that lists the motorbikes as "Tire B" and with a "Infantry" type meaning they can capture bases. Recons are listed as "Tire A" and "Vehicles" ... so maybe no go on that forest thing