Just a little spark info…

There is a lot more to a spark plug then just the name of the manufacturer!

What exactly is a plug made of and why?

The terms "resistor, copper core, Iridium and more have been bandied about for years..but how many of us really know what they do?

Simply put, these innovations may enhance the performance of the spark plug. For instance, a spark plug can incorporate an internal resistor to minimize radio and TV interference, while also reducing electrode erosion for longer plug life.

A copper core increases the rate of heat conduction in the plug tip and improves resistance to all types of fouling.

Iridium is a .6mm fine wire design that provides better overall ignitability, more focused ignition for faster fuel combustion and reduced fouling.

Bottom line? The plug and attributes that you pick for your sled should be made for that motorcycle as not every plug will work well in a particular application.

Do you know the heat range?

The heat range of the spark plug determines how much heat the spark plug is capable of removing from the combustion chamber. The heat range of the spark plug does not increase or decrease horsepower. It changes the temperature of the tip of the spark plug. If the heat range is too cold, the deposits will not burn off the tip and the spark plug will foul. If the spark plug heat range is too hot, pre-ignition can occur. A switch in heat range of the spark plug will change the temperature of the spark plug tip by 70-120 degrees.
If you are unsure of the correct heat range to use, always start with a colder spark plug. If the plug is too cold, the plug will eventually foul and a misfire will occur. This will not hurt the engine. Unfortunately, though, if a spark plug that is too hot is inadvertently chosen, pre-ignition and detonation can severely damage your engine. Don’t go to a hotter heat range unless you’ve consulted your engine experts.

Do you know why heat range is so critical?

Why is Heat Range Critical?
It is the measure of how fast the spark plug tip dissipates combustion heat. It must do this in a controlled manner that will:
1. Stay cool enough to avoid pre-ignition and/or electrode destruction.
2. Run hot enough to burn off combustion deposits that would otherwise collect at the firing tip.
3. Adapt to specific engine characteristics and widely
varying driving/load conditions.

How is Heat Range Engineered?

Heat is conducted away from the firing tip through the (1) insulator to (2) the spark plug shell to (3) the cylinder head.
Thus, heat ranges are primarily controlled by the length of the insulator through which the heat must travel before escaping to the cylinder head.
Other factors effecting Heat Range are the thermal characteristics of the insulator and the bond of the insulator to the shell. In both regards, Autolite plugs are superior.

So what does all this mean you ask?

Check to see if you are using the right spark plug and if its time for new plugs!

Rivera Primo Carries Autolite Spark plugs so check them out!


or http://autolite.com/




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