Vespa? I was thinking more of Ducati, Firebolt, Mitsubishi, Honda, or at least Yamaha (two of my neighbors both own motorbikes, one a nice high-end Suzuki while the other is more Kawasaki dirt bike range).

Betcha he'll help increase the Autobots' fangirl population (if they don't already have one, that is), alongside 'Bee, Blue, and 'Flight.