What is the spark plug gap on a motorcycle?

Most Harley models with electronic ignition call for a range of 0.38 to 0.42 (0.40 average) gap, but consult your owners manual for your specific model. CV Performance carries a full line of spark plugs for Harley and Buell models.

What is the gap on an NGK?

NGK doesn’t recommend adjusting the plug gap more than . 008″ in either direction. Beyond that slight adjustment, the ground electrode and center electrode won’t align properly, hindering spark plug performance and drastically reducing plug life.

What happens if you gap spark plugs too much?

The customer may experience loss of power, misfires, spark plug fouling, increased plug wear, or poor gas mileage. Too small of a gap may give too weak of a spark to complete the combustion process within the engine; too wide of a gap can lead to the spark plug not firing correctly, causing misfires at high speeds.

What happens if my spark plug gap is too small?

The Spark-Plug Gap If the gap is too small, the spark will likely be too weak and cause the engine to run poorly or with poor efficiency. A spark-plug gap gauge both measures and adjusts the gap and is inexpensive and simple to use.

Do you need to set the spark plug gap?

Spark Plug Gap setting is important for proper engine operation. To set the spark plug gap correctly, you need to use a spark plug gap tool. For reference, see our spark plug gap chart below, this chart converts metric measurements to standard.

How much HP can you gain by replacing spark plugs?

It is not uncommon to gain as much as 20 Hp just by replacing used spark plugs. Used spark plugs are hard to fire as the gaps are worn out, and insulation properties of the ceramic is compromised by solid combustion deposits and old fuel saturation.

What is the pressure between the spark plug gap and ground electrode?

between the spark plug gap (center electrode and ground electrode). 2) Pressure in the combustion chamber at time of spark discharge – Depends on compression and aspiration of the engine. High compression engines and engines with forced induction have higher combustion chamber pressures at time of spark discharge.

What are the spark plugs for a motorcycle?

not present 50 50 F50 70-71 FA50 87-91 0.0240.028 50 50 FA50 81-84 FA50 1986 0.0280.028 50 50 FS50 1981 FZ50 79-82 0.0280.028 50 50 JR50 94-06 JR50 79-93 0.0280.028