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Vehicles Research and Development Establishment (VRDE) has developed two-stroke, air-cooled, horizontally-opposed, simultaneously firing, gasoline high specific output twin-cylinder engine developing 21 hp and four-cylinder engine developing 37 hp with modular concept for Remotely Piloted Vehicle (RPV). High specific output requirement entails some problems associated with high RPM potential, reed valve induction, high compression ratio, plated cylinders, cylinder ports, crankcase induction, air-cooling etc. This paper describes and lists the technology incorporated for optimization of fuel consumption on these engines. The six-petal reed valve induction provided in these engines which works independently on the basis of engine demand not only ensures steady and smooth engine performance throughout the entire range of speed but also prevents back-flow of mixture during crankcase compression.