A scooter or motor scooter, is a motorcycle with an underbone or step-through frame, a seat, and a platform for the rider's feet.
Yamaha Aerox
The term scooty, the generic term for scooter in India
1894 Hildebrand & Wolfmüller motorcycle
An underbone is a type of motorcycle that uses structural tube framing with an overlay of plastic or non-structural body panels and contrasts with monocoque or unibody designs where pressed steel serv
Honda Winner, an underbone with 150 cc engine displacement.
Plastic panels and covers are widely used on modern underbones e.g. Modenas Kriss 2.
MCX Raptor, an underbone from the Philippines.
Plastic panels and covers are widely used on modern underbones, such as a Suzuki FX125