stereochemistry (stÄr'Ä-Å-kÄm'Ä­-strÄ) The branch of chemistry that deals with the spatial arrangements of atoms in molecules and with the chemical and physical effects of these arrangements.
ECU. Short for Electronic Control Unit, the ECU is a name given to a device that controls one or more electrical systems in a vehicle. It operates much like the BIOS does in a computer.
ECU tuning is the art and science of cracking the code that the factory installs in your motorcycle's brain and giving it an upgrade. Tweaking your ECU means removing things like low RPM power restrictions, closed loop fuel maps, error codes when changing parts, and a slew of other options.