BDC
From MopedWiki
BDC is an abbreviation for Bottom Dead Center which refers to the point in the piston's travel at which it is closest to the crankshaft and oriented at the base or bottom of the cylinder.
BDC is an abbreviation for Bottom Dead Center which refers to the point in the piston's travel at which it is closest to the crankshaft and oriented at the base or bottom of the cylinder.