What brand spark plug does Harley Davidson use?
NGK Iridium IX
NGK Iridium IX DCPR7EIX Spark Plugs for 1999-2016 Harley Davidson Twin Cam (Pair)
What is the difference between NGK dcpr7e and dcpr8e?
Registered. From what I can tell, the 8E is the stock plug and the 7E is a hotter plug.
How do I know what size my spark plugs are?
The first letter of the ND spark plug code (in this case an “X”) indicates the thread size of the spark plug. There are three size spark plug threads currently being used in motorcycles and ATVs. “W” indicates a 14 mm x 1.25 pitch size, “X” indicates a 12 mm x 1.25 size and “U” indicates a 10 mm x 1.0 size.
How often should you change spark plugs on a Harley?
The spark plugs in the motorcycle should be replaced every 8000 miles to 10,000 miles (13,000 to 16,000 kilometres). In addition, the spark plugs need to be checked every 4000 to 5000 miles (6500 to 8000 kilometres) traveled. Most spark plugs usually have a lifespan of 10,000 miles.
Are E3 spark plugs good for Harley Davidson?
Motorcycle spark plug that fits a variety of powersport applications. E3. It is used in a variety of powersport applications, and is often the correct plug for V-Twin motorcycle engines. Most late model Harley Davidson engines require E3.
How can I tell if my Harley is running lean?
The first sign you’ll have of a motorcycle running lean is if you are having a rough idle. If you start the motorcycle and it has a difficult time staying on by itself or you notice a rough sputter while it’s in a stationary position, this is a good indication of a lean mixture.
What should a good motorcycle spark plug look like?
Good running conditions: If everything is good, the spark plug should have a tan/light brown color. Rich running conditions: If your engine is running too rich, the spark plug will be black and sooty. Lean running conditions: If your engine is running too lean, the spark plug will be white.
What is the spark plug gap on a Harley Davidson?
0.38 to 0.42
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.
Are all spark plugs 3 8?
Most spark plugs require a 5/8″ (16mm) size spark plug socket. But there is no such thing as a 3/8 spark plug.
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.