Mg midget 1275 bore and stroke

Piston are slightly conical in design, because what a internal combustion engine does, they are the smallest at the crown, or top because this is where the controlled explosion happens, and where the heat is, and taper slightly in size being the largest at the end of the skirt, the industry standard of where to measure a piston for piston to cylinder clearance is opposite of the piston pin bores, unless the piston manufactuer states differently in their instructions.

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