Best Spark Plugs For Harley Davidson

Accessories, Harley, Spark Plugs

If you’re looking for the best spark plugs for your Harley-Davidson, then you’ve come to the right place. There are several options available to you, including Iridium Performance C0231-AZ3, Champion RA8WHP (9701), NGK Iridium, and Yttrium. Read on to learn more about the pros and cons of each and what you should look for in a new spark plug.

Bestseller No. 2
BDFHYK Set of 4 Iridium Spark Plug Compatible with 1988-2016 Harley-Davidson Sportster 1200, 1986-2016 Harley-DavidsonSportster 883 Engine Replacement for DCPR7EIX 6046 9701 97637
  • 【Precautions for Purchase】:Compatible with 1988-2016 Harley-Davidson Sportster 1200, 1986-2016 Harley-DavidsonSportster 883.Please confirm the compatibility according to the year/make/model of your vehicle and the OE number of the replaceable part.
  • 【Spark Plug Features】:BDFHYK Spark Plugs offer superior ignition performance, quicker and more sensitive ignition jumping, and a significant increase in power performance. Fuller combustion efficiency, effectively reducing pollution emissions. Longer service life, generally more than twice that of a nickel alloy. The economic service life of 30000-40000 km.
  • 【Relive Performance】:OE standard performance and durability TS16949 certified manufacturer. All center electrodes are made from extremely fine iridium electrodes for good ignition performance. Insulators are made from isostatic ceramics for high density, strength, and good insulation.
  • 【Compatible Part Numbers】:Spark Plug compatible to DCPR7EIX 6046 9701 97637.
  • 【Buy with Confidence】: Exquisite craft,100% new and high quality auto parts,OE level durability.
Bestseller No. 3
Bestseller No. 4
Motoforti 2 Pcs 10.4mm 10mm Spark Plug Wire Kit for Harley Davidson Big Twin FXD Dyna 2000-2017 for Harley-Davidson Softail 1999-2017 Spark Plug Wires Motorcycle DYNA-409RD Red Silicone
  • [OE Number] DYNA-409RD. This is available for street or race applications.
  • [Fitment] For Harley-davidson Dyna FXD 2000-2017, For Harley-davidson Softail 1999-2017. Normally fit for like factory location on cylinder for Harley-Davidson or Big-Twin which has the coil mounted on the seat post. Please confirm make/model/year and size of the spark plug before purchase.
  • [Features] Come with 10.4mm & 10mm rubber ends, black 90 degree and straight boots for pre-crimped. Adopted with silicone material for whole jacket, insulation and core to bear high-temperature.
  • [Function] Prolong the service time of the engine and reduce fuel waste. A replacement for wire, relocation kits, new look, bobbers, scramblers, cafe racer etc.
  • [Package] Include 2x Spark plug wire pre-crimped. Please connect it with original way or search professional video when replace it in doubt.
Bestseller No. 5
Guteauto 2 Pcs Spark Plug Wire Kit 10.4mm 10mm Red Silicone DYNA-409RD Compatible for Harley-Davidson Dyna FXD 2000-2017 Harley-Davidson Softail 1999-2017
  • ➤ OE number: DYNA-409RD. Spark Plug Wire Kit is compatible for Harley-davidson Dyna FXD 2000-2017, For Harley-davidson Softail 1999-2017.
  • ➤ The replacement wire, relocation kits, fresh looks, bobbers, scramblers, cafe racers, etc. are all wonderful uses for the spark plug wire kit.
  • ➤ Pre-crimped black 90 degree and straight boots with 10.4mm & 10mm rubber ends are included. For the entire jacket, insulation, and core, silicone material was used to withstand high temperatures.
  • ➤ The spark plug wire kit is comprised of premium materials and has a consistent performance, high reliability, and is wear-resistant. durable and dependable quality.
  • ➤ Packing Include: 2 Pcs Spark plug wire.
Bestseller No. 6
Iridium Performance Spark Plugs Pair for Harley Softail Slim Twin Cam repl. Harley# 6R12
  • The ultimate in spark plug technology and performance
  • Iridium electrode is smaller than a standard electrode; requires less voltage
  • Hotter spark and extended spark plug service life compared to conventional plugs
  • Has the distinctive black ceramic with and gold-colored corrosion-protected coating on the metal shell
  • Sold in pairs and replaces Harley# 6R12 / NGK# DCPR7EIX
Bestseller No. 7
2Pcs CNPAPC Upgrade Double Iridium IX Spark Plugs DCPR7EIX #3144#6046#97637 for 1999-2016 Harley Davidson Twin Cam…
  • 【SUPER POWER】Double Iridium IX Spark Plugs are designed specifically for the performance enthusiast. Iridium IX offers extreme ignitability, improved throttle response. Double iridium is the best spark plug material
  • 【MORE FUEL EFFICIENT】The flameout phenomenon rarely occurs when using double iridium spark plugs,The engine can also be kept in good running condition, resulting in lower fuel consumption. So it is really necessary to replace the good double iridium spark plugs.
  • 【LONGER LIFE】The fine Double Iridium tip ensures high durability and a consistently stable spark. Double Iridium alloy has extremely high melting point, perfect for today's high-tech, high-performance engines. Trivalent Metal Plating - Outstanding acceleration, long life ,high fuel efficiency and durability. Ultimate design, technology and performance.
  • 【COMPATIBLE MODELS】DCPR7EIX #3144 Replacement racing spark plug used by many professional car drivers and fit for 2000 Dyna Super Glide;1999-2016 Harley Davidson Twin Cam;XL Sportster 883/1200 1986-present; Ultra;Suzuki Boulevard ;If it has the same parameters as this product, it can be compatible
  • 【QUICK AFTER SALES SERVICE】One order = 2 Pieces ,We provide 12 months warranty service for this spark plugs, and we attach great importance to every customer's satisfaction. If for any reason we are not meeting your expectations, please feel free to contact us and we will do our best to resolve all your concerns.
Bestseller No. 8
Spark Plug Wires Black 8.8mm for Davidson 883 1200 Sportster XL 86-03,‎2104-0143,144025,Black, Vanshly
  • √【OEM Part Number】:2104-0143
  • √【Compatible with】:2002-2003 Davidson 883 Roadster XLR ,1996-2003 Harley-Davidson 1200 Custom XLC ,1999-2003 Harley-Davidson 883 Custom XLC ,1988-2003 Harley-Davidson Sportster 1200 XLH ,1986-2003 Harley-Davidson Sportster 883 XLH ,1986-1987 Harley-Davidson Sportster 1100 XLH ,1986-1995 Harley-Davidson 883 Deluxe XLH ,1987-2003 Harley-Davidson 883 Hugger XLH ,1996-1997 Harley-Davidson 1200 Sport XLS ‎
  • √【High-Quality】:The spark plug wire kit is made of high-quality materials, with wear resistance, high reliability, long service life and stable performance. Helps provide maximum voltage and ensures final performance.
  • √【Function description】:The spark plug wire is used as the medium between the ignition coil and the spark plug to power the engine. It can transfer the high-pressure fire distributed by the distributor to the spark plug and then drive the engine to rotate. Engine spark plug wire damage will cause engine fire and cause engine shaking. Timely replacement of damaged spark plug wires can prolong the service life of the engine and reduce fuel waste.
  • √【Warm Tips】:If you encounter problems during the installation process, please contact us immediately,Please make sure your model matches what is listed he
Bestseller No. 9
10mm Spark Plug Wire Fits for Harley Davidson Sportster 883 1200 XL 1986-2003, 2104-0143 - Blue Silicone
  • 10mm Spark Plug Wire Fits for Harley Davidson Sportster 883 1200 XL 1986-2003
  • The spark plug wire kit fit for Harley Davidson Sportster 883 1200 XL 1986-2003. Warm Tips:Please check the description for the specific model.
  • Function - Timely replacement of the damaged spark plug wire can prolong the service life of the engine and reduce fuel waste.10mm high performance ignition wires available for street or race applications.
  • High Quality Material - The spark plug wire kit made of high-quality silicone throughout the jacket, wear-resistant, high reliability, long use time, and stable performance.reliable quality and durable.
  • You will Get - 2 * Blue Spark Plug Wires (one 8" and one 20" long wires pre-crimped).
Bestseller No. 10
2 Pcs 10.4mm 10mm Motorcycle Spark Plug Wire Kit Replacement for Harley Davidson Big Twin FXD Dyna 2000-2017, Replacement for Harley-Davidson Softail 1999-2017 (Blue)
  • Replaces part number: DYNA-409RD. This is available for street or race applications.
  • Fitment: Replacement for Harley-davidson Dyna FXD 2000-2017; Replacement for Harley-davidson Softail 1999-2017.
  • Material: Come with 10.4mm & 10mm rubber ends, black 90 degree and straight boots for pre-crimped.
  • Features: Adopted with silicone material for whole jacket, insulation and core to bear high-temperature.
  • Function: Prolong the service time of the engine and reduce fuel waste. A replacement for wire, relocation kits, new look, bobbers, scramblers, cafe racer etc.

Iridium Performance C0231-AZ3

Iridium Performance C0231-AZ3, or IPC, spark plugs are a good choice for motorcycle enthusiast. They have the added benefit of being lighter and more durable than standard spark plugs. Moreover, they offer a longer lifespan than platinum electrodes. While iridium plugs do cost more, they can potentially increase the life of your Harley Davidson by 25%. To find out which sparkplug is best for your motorcycle, look up the recommended materials in your Harley owner’s manual. Harley users’ forums are also a good resource for deciding which sparkplug to choose.

The ignition system device comes as a set of OEM spark plugs. They ship gapped and pre-threaded. In addition, they feature an iridium tip that has been laser welded. They can last for up to 60,000 miles without being replaced. These plugs are great for enhancing the life of your Harley Davidson’s ignition system. These plugs are made to ensure that it runs at its best for many years.

You can also check the thread size, which is the length of the sparkplug. Make sure you check the thread size in millimeters to ensure the correct fit. Make sure to check the heat range and spark gap before purchasing a new sparkplug for your Harley. These sparkplugs are available in three different heat ranges. Choose a higher heat range if you want to get more mileage out of your Harley Davidson.

Iridium spark plugs improve the acceleration of your motorcycle and give it more power. They also improve the engine’s starting characteristics. You’ll be able to go up hills without fear of the engine stalling out. These spark plugs will give you more power and improve the comfort of your ride. If you are tired of your old spark plug, consider changing them with the latest ones.

Champion RA8WHP (9701)

When choosing a new spark plug for your Harley Davidson, it is important to know what the correct heat range is. In addition to the hexagonal size, other important parameters to consider are the reach, spark gap, and heat range. Usually, spark plugs have standard designation codes and you should look for these. For example, if you are looking for spark plugs for a 2004 Harley Davidson, you should look for the code “BPRSEIX-11,” which means it’s made of NGK’s Iridium IX material.

The E3 Spark Plug is a ground electrode module that helps in extending the spark into the combustion chamber. This helps the spark enter the chamber at a closer distance and fires the fuel/air mixture more efficiently. The lift of the spark plug’s edge makes it possible to experience a chimney impact that results in a faster ignition. As a result, the plug’s spark plug is a better fit for Harley Davidson motorcycles.

Another sparkplug to consider is the Champion RA8WHP (9701) Iridium sparkplug. These plugs feature an iridium center electrode and platinum ground electrode. Whether you want to replace your current spark plugs with a new one or just upgrade your current ones, you should consult your owner’s manual and a professional mechanic. If you aren’t sure what’s best for your Harley, check the user reviews online.

When choosing a brand new spark plug, you should also take the age of your bike into consideration. In the past, Harley Davidson sparkplugs would wear out very quickly. These new plugs, however, are more durable and last longer than their predecessors. Moreover, you should look for the type of electrode that suits your model of Harley Davidson motorcycle. It is vital to choose the right one to ensure optimal performance and starting.

NGK Iridium

Iridium spark plugs are known to offer many advantages over standard ones. They are able to deliver optimum ignition and smooth running, and are much harder than conventional plugs. Additionally, these spark plugs are guaranteed to reduce fuel consumption. Choosing NGK Iridium spark plugs for your Harley Davidson can improve the overall performance and longevity of your unit. If you’re not sure which kind of spark plug is best for your model, contact the manufacturer to see if they recommend NGK Iridium spark plugs.

NGK Iridium spark plugs are designed with a fine wire center electrode, Copper Core, Iridium Alloy tip, and Pure Alumina Silicate Ceramic Insulator. All of these components make them durable, as well as offer excellent electrical insulation properties. Their threads measure 12mm on a 1.25mm pitch, and they have a gasket-type seat. The electrodes have a high melting point, which promotes faster next-ignition. Additionally, they burn off carbon deposits and increase fuel economy.

Another major benefit of NGK Iridium spark plugs is their smaller electrodes. This means that they take up 25% less space than their platinum counterparts. This reduces the voltage needed to start the motorcycle, and extends the life of the ignition system. Unlike the old-style platinum plugs, these new NGK plugs are designed to hold their position without the use of tools. If you are interested in buying new spark plugs for your Harley Davidson motorcycle, you should consider the NGK Iridium brand.

NGK Iridium spark plugs also improve the speed of your motorcycle. These spark plugs are highly efficient, and their ultra-fine center electrode helps increase the overall performance of your motorcycle. Moreover, they have a lower dispersion rate, ensuring your motorcycle runs smoothly even at low speeds. They also enhance the performance of your engine and increase fuel economy. This is why it is important to replace your spark plug regularly.


Yttrium spark plugs for your Harley Davidson will not only increase the performance of your bike, but will also extend the life of the fuel system. Unlike other metals, iridium electrodes are much smaller, which means they require less fuel and less voltage to produce a spark. This allows you to use fuel more efficiently, reducing the amount of carbon residue in the exhaust.

The dual ground electrode results in optimal combustion, smooth acceleration, and idle, and is designed with colder heat ranges than the original spark plug. Some motorcycles may not be compatible with these plugs, so be sure to check the gap first. Manually increasing the gap may reduce the efficiency of the dual ground electrode. Yttrium spark plugs for Harley Davidson work well in gasoline-powered automobiles, lawn mowers, chainsaws, and snowmobiles.

When replacing your Harley Davidson spark plugs, check the wattage and heat rating. Copper is the best conductor of current. It also gets heat to move faster, which ignites the fuel. Copper spark plugs would wear out much quicker than iridium ones, but Champion makes copper spark plugs with a nickel alloy cover. Copper spark plugs don’t last as long, but Yttrium plugs are more durable.

If you are replacing your spark plugs, it is important to know the model of your motorcycle and the recommended size. NGK DCPR7EIX is a good choice for Harley Softail Rocker Custom models, while CHAMPION RA8WHP (9701) IRIDIUM SPARKPLUG has a fine-wire iridium center electrode and a platinum ground electrode.


Denso spark plugs for Harley & Dyna models have a few distinct advantages. These spark plugs are made for low-RPM performance, making them ideal for cruising around town. Many people think that spark plugs only need to be replaced when the engine is not running, but this is not the case. In fact, spark plugs play a much larger role in engine performance than most people realize.

When choosing the right spark plug for your Harley, you should consider its thermal range. Different spark plugs will have different thermal ranges, and a lower number means the plug will heat up quickly. On the other hand, a high number means that the plug will be cooler and will not heat up as quickly. You should also take into account the gap size, and if in doubt, contact a professional mechanic. A motorcycle expert can help you determine which type of plugs to purchase.

If you have an older model of a Harley Davidson, you should consider buying new Denso spark plugs for the engine. This will increase HP and performance. They do not come pre-gapped, so you’ll have to make adjustments to ensure they fit correctly. Other features of these spark plugs include a core resistor and removable terminal post. Additionally, they’re made with long insulators, which prevent flashovers. The four-piece plugs also have Iridium core electrodes for increased heat resistance. They also come with multiple ground electrodes for backup and safety.

DENSO Iridium plugs are the first to use iridium in a spark plug. They are becoming the most common device for high-tech engines today. The plugs are made with a 360-degree laser welding process to ensure that they have the best fit, function, and fit for your Harley Davidson. The DENSO Platinum TT spark plug will keep your Harley in top shape for many years.

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