There is an Aprilia \ Piaggio dealer on Gudai Lu as well. I believe there is some connection between them and a Chinese manufacturer (Zongshen?). I used to wander in to look a the 3 wheeled MP3 scooters. Also they sell the popular 150cc "City Fly" scooters, which have somewhat bigger wheels than typical scooters and go like stink. I think there have also been some cheap knockoffs of City Fly scooters being sold here in Shanghai.