Motorcycle Starter Motor Design

I need a complete design that turns an existing motorcycle stator-rotor pair into a high-performing starter motor. The goal is to squeeze more cranking power and faster starts out of the same space envelope while keeping weight and heat under control... (Budget: $1500 - $3000 AUD, Jobs: 3D Modelling, AutoCAD, CAD/CAM, Engineering Drawing, Manufacturing Design, Product Design, Solidworks, Thermal Analysis)