You asked: What size are motorcycle spark plugs?

What size is a motorcycle spark plug socket?

5/8″, 13/16″, and 18 mm are the ONLY socket sizes for motorcycle spark plugs.

Are spark plugs a standard size?

Most spark plugs require a 5/8″ (16mm) size spark plug socket. This refers to the size of the flats on the spark plug that are in contact with the socket. 3 of 3 found this helpful.

How do I know my spark plug size?

Measure the existing gap of the spark plug. Using your gap gauge or feeler gauge, run the tool through the electrodes to determine the measurement. Take note of the measurement and compare it to the recommended setting listed in the owner’s manual.

What size is a NGK spark plug?

NGK Spark Plugs

Gap 0.027″ (0.7mm)
Heat Range 6
Hex Size 13/16″ (20.6mm)
Reach 12.7mm (1/2″)
Seat Gasket seat

Are motorcycle spark plugs universal?

All spark plugs are not alike — different types of plug gap configuration exist: In general, they are the standard plug gap where the center wire tip is roughly even with the edge of the threads and the ground electrode protrudes a beyond the level of the threads.

Are all spark plugs the same?

All spark plugs have the same function but there are different types that are available for different types of vehicles. This is the most common spark plug available.

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What happens if you use the wrong size spark plug?

If you install the wrong size, the tips of each spark plug could make contact with the pistons inside the engine, which can cause extensive damage. … A warm or hot engine could damage the threads. You will also need to check the spark plug gap if the spark plugs are not already pre-gapped.