The Beare Head engine internal combustion engine technology combines a four stroke engine bottom end with a ported cylinder head closely resembling that of a two stroke, thus 4+2= six stroke. The head piston is smaller and has half the speed of the opposing piston. Functionally, the cylinder head piston replaces the valve mechanism of a conventional engine.
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“In some things, we Americans leave to other countries the carrying out of the principle that stands at the head of our Declaration of Independence.”
—Herman Melville (1819–1891)