A system and method can provide an air-fuel mixture to a two-stroke internal combustion engine. The system can include an air compressor. The air compressor can include a compressor inlet valve, a compressor outlet valve, and a compressor piston. A two-stroke internal combustion engine can be connected to the compressor. The engine can include an engine cylinder, an engine cylinder head, and an engine air-fuel inlet valve at the engine cylinder head. A pipe can communicate air and fuel between the outlet valve of the compressor and the engine air-fuel inlet valve. An air-fuel mixture can be provided to the engine cylinder through the engine air-fuel inlet valve, timed by the outlet valve of the compressor. The engine air-fuel inlet valve can be actuated by a pressure difference between the pipe and the engine cylinder. The outlet valve of the compressor is configured to be in a specified phased relationship to the compressor piston. The compressor piston is configured to be in a specified phased relationship with the engine.