What You Need to Know About Spark Plugs

There is much to learn about motorcycle spark plugs. Actually, there is more than meets the eyes.

First, let us distinguish the important difference in spark plugs' threaded ends. They come in four diameters and lengths. They come in nominal 14, 10, 12 and 18 millimeters diameters. previously, there was a slight difference in thread configuration especially in different countries. However, the international standardization of the thread forms made it uniform. These new dimensions are now being followed by motorcycle parts manufacturers.

Common Mistakes

There can be lots of error in selecting the best motorcycle parts, especially in the case of spark plugs. The very usual error is using ¾-inch plugs in ½-inch holes. The result of doing this is horrible. When the plug threads are exposed in combustion, they become filled with deposits. Consequently, it will be hard to remove the plug without removing the whole threads.

Quite the reverse, if you use a short plug into a deep hole, the deposit will fill the hole and it will be hard to re-install the right size of plug.

The worst error is the use of overly-long plug. The exposed threads absorb a great amount of heat from the combustion process which improve the plug-nose temperatures. As a consequence, the side electrode functions as a glow plug. Early ignition or runaway pre-ignition causes higher combustion chamber temperatures that can destroy the engine.

Heat Range Demands

Hot plugs come with a long insular nose. They lead heat high into the plug body before it returns to the cylinder head. Short-nosed plugs, on the other hand, have a shorter heat path. Consulting the spark plug manufacturers regarding the plug's heat range can be of great help.

This may somehow clear the cobwebs at the back of your mind regarding heat range demands. Knowing which plugs are colder or hotter may be easy if you stick to the same brand. However, it becomes perplexing when you change from one brand to another.

There is more to spark plugs than the three above mentioned aspects. There are still areas that we need to master like installation, different plug configurations and maintenance work. Nonetheless, we have to be first acquainted with these three aspects.

You must know more about spark plugs to pick the best type. Also, you have to complement your choice with your bike engine's condition. These factors are hard to acquire and do, thus, we have to instil lots facts all at once. When you get it right, you will be greatly benefited.

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