This thesis details a design of an exterior - rotor, fractional - slot, double layer per- manent magnet synchronous motor for a two-wheeler application.The cooling method used was natural cooling. The initial design procedure was adopted from previously published works by other authors [1, 2] . ANSYS MotorCAD software was used in design of the machine,optimization and verification of the machine’s performance.A review of different electric motor types was carried out to choose a suitable ma- chine type and configuration. Comparative analysis of BLAC and BLDC motors was performed and considering the application requirements Sinusoidally fed permanent magnet synchronous motor was chosen (commonly referred as BLAC motor) . An extensive sensitivity analysis was done using the tools available in MotorCAD simu- lation platform. Further the optimization of the selected design in terms of electro- magnetic performance was carried out using MotorCAD. Finally, the electromagnetic and thermal performance validation was done using the same software.