Everyone will be able to answer in broad strokes What a spark plug is. In gasoline engines, it generates the ignition spark between its electrodes that is necessary for igniting the fuel-air mixture.

Visually, these small but immensely important parts for the proper functioning of the engine have hardly changed since their pioneering days more than 120 years ago. Much of the basic technology has also remained the same. The only difference is that spark plugs are much more reliable nowadays. Hardly anyone who drives a new vehicle ever gets to see them in the course of a do-it-yourself installation.

Those who drive a classic car, on the other hand, know how to file away at the spark plug face with oily rags and a wire brush when the engine once again refuses to start for some inexplicable reason.

Buying spark plugs online
But thanks to the electronic controls that many spark plugs in modern internal combustion engines are subject to these days, major wear and tear has long been a thing of the past.

On a Vespa GTS 125, for example, the spark plug is not due to be changed until after 20,000 kilometers, provided everything goes according to plan. Before that, all that is needed is a check and, if necessary, cleaning to keep the engine purring along.

Find the right spark plug for every motorcycle and scooter online here.