See metering rod.

Ports designed to a set size to allow accurate flow of fuel or air.

A tapered needle in a jet in a carburettor. The taper allows a varied or metered supply dependent on the position of the taper in the jet.

Methyl-alcohol used as a fuel or fuel additive.

The way in which a task is carried out.

A fast-evaporating solvent.

European standards of measurement based on the metre.

A system designed to regulate measurement. Each quantity has a single unit. These include; metre, kilogram, ampere.

Multiport fuel injection. Usually known a port fuel injection or multipoint fuel injection (MPI).

Metal hydride