Readers ask: What Brand Are Harley Davidson Spark Plugs?

Are all spark plug brands the same?

All spark plug manufacturers cross-reference their plugs with other brands so their brand can be interchanged with other brands. In other words, any brand of spark plug can be used in any vehicle make or model application assuming the plug has the correct dimensions, design and heat range.

How often should you change spark plugs on Harley Davidson?

In modern motorcycles, spark plugs should be replaced after every 15,000 to 16,000 miles of riding your motorbike. However, if your bike is sputtering, running rough, or even losing power, just think about inspecting and replacing the spark plug.

How many spark plugs does a Harley M8 have?

The M8 has two Harley Davidson spark plugs per cylinder. Four spark plugs total. The two spark plugs on the left side of the motorcycle are easily accessible.

Are Iridium plugs better?

Iridium is said to be six times harder and eight times stronger than platinum with a 700° higher melting point. Iridium spark plugs have extremely fine electrodes while retaining excellent wear characteristics. Thanks to its strength, iridium spark plugs can last up to 25% longer than comparable platinum spark plugs.

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What’s the best spark plugs for horsepower?

Best Spark Plugs for Horsepower

  • Denso (4504) PK20TT.
  • NGK 3403 G-Power.
  • ACDelco 41-962.
  • NGK Iridium IX.
  • ACDelco 9748RR Wires.

Do iridium spark plugs increase horsepower?

Iridium plugs take less voltage to fire which results in more coil dwell time. That translates to better combustion, lower emissions, better fuel economy and more horsepower. Lower your costs. It’s true – buying an upgraded plug does cost more than a basic spark plug.

Are iridium spark plugs worth the money?

Iridium spark plugs give you even better gas mileage, performance, reliability, and longevity than double-platinum plugs. Due to the advanced material and innovative technology integrated into iridium spark plugs, these plugs are priced higher than copper and platinum options.

How often should you replace motorcycle spark plugs?

Motorcycle spark plugs should be replaced every five years.

How often should I change Harley oil?

Motorcycles needing semi-synthetic motor oil can usually last between 5,000-8,000 miles before needing to change the oil. Finally, motorcycle engines running off fully synthetic motor oil will be able to last between 7,000-10,000 miles before needing to change the oil.

How long do Iridium spark plugs last in a motorcycle?

Iridium. Iridium isn’t a great conductor of electricity, but that doesn’t compromise on its performance as a spark plug. In fact, iridium plugs can outlast the copper versions; they have a service life of about 40,000 to 80,000 miles, depending on the manufacturer.

Is NGK better than Denso?

Denso plugs are installed on almost every automobile model manufactured in Japan. The iridium used in them has a superior hardness. The electrode’s diameter in Denso plugs shrinks more than an NGK. For this reason, Denso plugs do not last longer than NGK units, but they are better at producing powerful sparks.

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What are the best spark plugs for fuel economy?

5 Best Spark Plugs for Gas Mileage and Performance

  • #1 – NGK G-Power Spark Plugs.
  • #2 – NGK Iridium IX Spark Plugs.
  • #3 – Bosch Double Platinum Spark Plugs.
  • #4 – Denso Platinum TT Spark Plugs.
  • #5 – Motorcraft Platinum Spark Plugs.

Do spark plugs increase horsepower?

In short, yes, in some situations spark plugs can increase horsepower. The theory behind spark plugs increasing horsepower is that by providing more spark to the firing tip of the spark plug, it will (and does) combust more fuel.

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