The Faggio is a motorcycle returning from earlier GTA games. Rockstar first showed it in Rockstar's website.
Image: Rockstar GamesAlvino V1
First shown: Official Screenshot: Jason Duval 01
Image: Rockstar GamesAvarus
First shown: Official Screenshot: Ambrosia 01
Carbon RS
The Carbon RS is a Nagasaki motorcycle returning from earlier GTA games.
Double T
The Double T is a Dinka motorcycle returning from earlier GTA games.