I am not familiar with the Aprilia Mojito 125, but I wouldn't do it. I would not tow any bike that way, other than a chain driven bike with the chain removed. Even a chain drive bike (with the chain on it) turns part of the transmission, and I wonder what would happen if you hit a bump and knocked it into gear? I suppose you could pull the clutch all the way in, and fasten it there somehow, but I still wouldn't do it. There are hitch receivers for smaller bikes (I used to have one that fit my F150, so I could haul my dirt bike with the camper shell on it) and for bigger bikes, I would just use a flatbed trailer, load the bike on it, and tie it down.
2002 Vulcan 750 (engine out, slowly being disassembled) 2013 Royal Enfield B5
2001 XT225, 2009 Genuine Stella
2012 Zuma 125, 1980 Puch moped