It's not practical for an efi system to be installed on a 25 year old two stroke engine. The injection systems that are used on two strokes engines today require TBap sensor, exhaust temp sensor, crank position sensor, engine temp sensor and and a control unit with a very intraget fuel/ignition mapping. That requires a stator that can supply sufficient power. Not to mention the only big gains would come from a direct injection that requires injectors to be installed directly in the transfer ports. Cylinder disgn and port setup changes dramatically with a setup that would give you any tipe of big gains. Fuel injection is very temperamental with mods. If you start changing pipe set ups, port timing, even a open airbox. The control unit would need reprograming or a piggy back control unit. Sounds good but not practical.