XG-555 High Performance Gas Scooter Adult Electric Scooter April 28, 2015 Get link Facebook X Pinterest Email Other Apps XG-555 High Performance Gas Scooter Black Adult Electric Scooter 50cc 2 Stroke XG-555 which comes standard with a EPA certified pull-start gasoline engine. The frame is made of high tension steel, the deck is made of high grade Billet Aluminum, these 2 features alone make this XG-555 High Performance Gas Scooter Black Adult Electric Scooter the toughest gas powered scooter on the market today.