The document summarizes the design of a Moto3 racing motorcycle. Key points: - The design meets the technical regulations for the Moto3 World Championship class, which replaced the 125cc class and uses 250cc 4-stroke engines with a minimum weight of 148kg including the rider. - The design includes a prototype chassis, carbon fiber fairings, and focuses on the main frame, swingarm, front and rear suspension design through solid modelling and structural analysis. - The results found the frame and swingarm designs were heavier than 125cc bikes but met stiffness targets for racing motorcycles. The suspension rates avoided bottoming out.