Best Spark Plug Wires for Harley Davidson – Get Right One

Motorcycles come in a variety of styles and sizes. Although they may look very different, they mostly share common component types. For instance, there is no motorcycle ignition system without spark plugs and wires or coils. This article will go through the process of spark plug wire replacement and provide the best spark plug wire sets for all models of Harley Davidson.

Best for Touring – ‎Accel 175098 or Sumax ‎20436 or Accel 175082

Best for Sportster – JBSporty Wire or Accel 172086 or Accel 172086K

Best for Softail (2017> Up) –  Accel Wire Set

Best for  Softail (Before <2017) – Accel Custom Wire

Best for Dyna (Before <2017) – AIP Dragon Fire

Best for V-Twin – Aokus Spark Plug Wire

Best for Low Riders – Accel 172072

Best OEM – AIP Electronics ‎PWJ191

Types of Spark Plug Wires

1. Magnetic Resistance Wire

This type of spark plug wire is the cheapest resistive wire to produce. The insulation of these wires tends to burn through and short out. 

2. Molded Spark Plug Wire

A molded wire is made by using a metal braid that runs along the length of the insulator. There are rings with winding loops at specific intervals that make up the path for the high-energy spark needed by your bike’s cylinders to fire each compression stroke efficiently and adequately.

3. Super Spark Plug Wire or Dyna-Core

This wire has a copper alloy core wound with fiberglass cloth, making it more durable and robust, especially for high RPM use and racing applications.

Different Spark Plug Wires –  Best for Harley (All Models)

Best for Big Twin
Aokus 10.4mm 10mm Spark Plug Wire Compatible with Harley Davidson Big Twin 99-19 FXD Dyna Softail (Red)
Best for Touring
Sumax Custom Yellow 8mm Plug Wires 20436
Best for Sportster
JBSporty Coil and Ignition Relocation Bracket w/Harley Orange Taylor Wires Harley Davidson Sportster, Nightster, 72, 48 Iron Roadster 883 1200
Best for Softail (2017> Up)
ACCEL Motorcycle 171117-R Custom Wire Set - 2018-up Harley Davidson Softail - 8mm - Red
Aokus 10.4mm 10mm Spark Plug Wire Compatible with Harley Davidson Big Twin 99-19 FXD Dyna Softail (Red)
Sumax Custom Yellow 8mm Plug Wires 20436
JBSporty Coil and Ignition Relocation Bracket w/Harley Orange Taylor Wires Harley Davidson Sportster, Nightster, 72, 48 Iron Roadster 883 1200
ACCEL Motorcycle 171117-R Custom Wire Set - 2018-up Harley Davidson Softail - 8mm - Red
Best for Big Twin
Aokus 10.4mm 10mm Spark Plug Wire Compatible with Harley Davidson Big Twin 99-19 FXD Dyna Softail (Red)
Aokus 10.4mm 10mm Spark Plug Wire Compatible with Harley Davidson Big Twin 99-19 FXD Dyna Softail (Red)
Best for Touring
Sumax Custom Yellow 8mm Plug Wires 20436
Sumax Custom Yellow 8mm Plug Wires 20436
Best for Sportster
JBSporty Coil and Ignition Relocation Bracket w/Harley Orange Taylor Wires Harley Davidson Sportster, Nightster, 72, 48 Iron Roadster 883 1200
JBSporty Coil and Ignition Relocation Bracket w/Harley Orange Taylor Wires Harley Davidson Sportster, Nightster, 72, 48 Iron Roadster 883 1200
Best for Softail (2017> Up)
ACCEL Motorcycle 171117-R Custom Wire Set - 2018-up Harley Davidson Softail - 8mm - Red
ACCEL Motorcycle 171117-R Custom Wire Set - 2018-up Harley Davidson Softail - 8mm - Red
Best Wire for Harley Softail (Before <2017)
ACCEL Motorcycle 175100 Custom Wire Set - 00-08 Softail w/Carb - 300+ - Black
Best for Dyna
AIP Electronics Dragon Fire Race 10.2mm Spark Plug Wire Set for 1999-2017 Harley DYNA Models OEM Fit PWJ188
Best for Low Riders
ACCEL Motorcycle 172072 Custom Race Wire - Select Sportster, Softail and Dyna Models - 8.8mm - Stainless Steel Core - Yellow
Best OEM (Touring/Trike)
AIP Electronics Dragon Fire Race 10.2mm Spark Plug Wire 2009-2016 Harley-Davidson Touring Trike OEM Fit PWJ191
ACCEL Motorcycle 175100 Custom Wire Set - 00-08 Softail w/Carb - 300+ - Black
AIP Electronics Dragon Fire Race 10.2mm Spark Plug Wire Set for 1999-2017 Harley DYNA Models OEM Fit PWJ188
ACCEL Motorcycle 172072 Custom Race Wire - Select Sportster, Softail and Dyna Models - 8.8mm - Stainless Steel Core - Yellow
AIP Electronics Dragon Fire Race 10.2mm Spark Plug Wire 2009-2016 Harley-Davidson Touring Trike OEM Fit PWJ191
Best Wire for Harley Softail (Before <2017)
ACCEL Motorcycle 175100 Custom Wire Set - 00-08 Softail w/Carb - 300+ - Black
ACCEL Motorcycle 175100 Custom Wire Set - 00-08 Softail w/Carb - 300+ - Black
Best for Dyna
AIP Electronics Dragon Fire Race 10.2mm Spark Plug Wire Set for 1999-2017 Harley DYNA Models OEM Fit PWJ188
AIP Electronics Dragon Fire Race 10.2mm Spark Plug Wire Set for 1999-2017 Harley DYNA Models OEM Fit PWJ188
Best for Low Riders
ACCEL Motorcycle 172072 Custom Race Wire - Select Sportster, Softail and Dyna Models - 8.8mm - Stainless Steel Core - Yellow
ACCEL Motorcycle 172072 Custom Race Wire - Select Sportster, Softail and Dyna Models - 8.8mm - Stainless Steel Core - Yellow
Best OEM (Touring/Trike)
AIP Electronics Dragon Fire Race 10.2mm Spark Plug Wire 2009-2016 Harley-Davidson Touring Trike OEM Fit PWJ191
AIP Electronics Dragon Fire Race 10.2mm Spark Plug Wire 2009-2016 Harley-Davidson Touring Trike OEM Fit PWJ191

Key Factors – Harley Spark Plug Wire Buying Guide

Here is what you should think about when buying spark plug wires for your Harley:

Compatibility

All spark plug wires are not created equal, so special care must be taken when buying replacement ones to ensure they work with your motorcycle.

Insulation

The material used in the insulation of the wire has to withstand high temperatures and provide insulation. Cheaply made insulated wires will corrode your engine components and cause poor performance.

Length

Spark plug wires should be long enough to cover the distance between each of the spark plugs on your bike and any ignition modules or boxes that may get in your way. Too short or too long of a set could leave certain areas unconnected. Or create unnecessary bends that might get worn down over time and affect insulation and voltage transfer.

Order

The order you attach the spark plug wires to your motorcycle’s ignition coils is very important. Failure to follow this process might cause reduced power and, ultimately, engine damage. On most motorcycles, the firing order of cylinders is 1 at the front left, 3 in the middle right, four at the rear right side, and two at the front left.

Number of Spark Plugs

As a general rule of thumb, one wire runs from each spark plug to its corresponding ignition module or box. If you have eight cylinders on your motorcycle, you will need a total of 8 wires (8-plug).

Warranty

The general rule is that most replacements come with guarantees for 12 months or more against defects and damages, excluding physical damage. Knowing this information can help prevent unnecessary problems later down the road, so it’s worth looking into before you buy.

Bestseller No. 1
Aokus 10.4mm 10mm Spark Plug Wire Compatible with Harley Davidson Big Twin 99-19 FXD Dyna Softail (Red)
  • ●Replace for Manufacturer Part Number: DYNA-409RD
  • ●Fits for virtually like factory location on cylinder Harley-Davidson or Big-Twin that has the coil mounted on the seat post.10.4mm high performance ignition wires available for street or race applications
  • ●Great for replacement wire, relocation kits, new look, bobbers, scramblers, cafe racer etc
  • ●Perfect Fitment, directly replacement. Made of high quality material, reliable quality and durable.
  • ●Package includes: 2 * Red Spark Plug Wires (one 8" and one 20" long wires pre-crimped)
Bestseller No. 2
TONRYCUE 10.4mm 10mm Spark Plug Wire Compatible with Harley Davidson Big Twin 1999-2019, and for FXD Dyna Softail
  • Compatible with: for Harley-davidson Dyna 2000-2017;Softail 1999-2017
  • Material: Made of high quality material, reliable quality and durable
  • Package Included: 1 x 8" long wire pre-crimped and 1* 20" long wires pre-crimped
  • Note: Please make sure the size of the spark plug if fit your car or not before you order
Bestseller No. 3
Aokus 10mm Black Spark Plug Wires Compatible with Harley-Davidson Softail 1984-1999 FXST/FLST
  • ▲Compatible with Harley Softail 84-99 FXST/FLST
  • ▲WIRE LENGTH: 17" / 7"
  • ▲10mm high performance ignition wires available for street or race applications
  • ▲Perfect Fitment, directly replacement. Made of high quality material, reliable quality and durable.
  • ▲Package includes: 2 * blue Spark Plug Wires (one 17" and one 7" long wires pre-crimped)
Bestseller No. 4
TONRYCUE Spark Plug Wire Compatible with Harley Davidson Big Twin 1999-2019, and for FXD Dyna Softail (Red)
  • Compatible with: for Harley-davidson Dyna 2000-2017;Softail 1999-2017
  • Material: Made of high quality material, reliable quality and durable
  • Package Included: 1 x 8" long wire pre-crimped and 1* 20" long wires pre-crimped
  • Note: Please make sure the car's model if fit your car or not before you order
Bestseller No. 5
Tavaski 10.4mm 10mm Spark Plug Wire Kit Fit for Harley Davidson Big Twin 1999-2019 FXD Dyna Softail, Replace DYNA-409RD - Red Silicone
  • Fitment- The spark plug wire kit fit for Harley-Davidson Dyna and fit for Harley-Davidson Softail.Fits for virtually like factory location on cylinder Harley-Davidson or Big-Twin that has the coil mounted on the seat post. Warm Tips:Please check the description for the specific model.
  • Perfect Fit - The spark plug wire kit is great for replacement wire, relocation kits, new look, bobbers, scramblers, cafe racer etc. Replace number is DYNA-409RD.
  • Function - Timely replacement of the damaged spark plug wire can prolong the service life of the engine and reduce fuel waste.10.4mm high performance ignition wires available for street or race applications.
  • High Quality Material - The spark plug wire kit made of high-quality materials, wear-resistant, high reliability, long use time, and stable performance.reliable quality and durable.
  • You will Get: 2 * Red Spark Plug Wires (one 8" and one 20" long wires pre-crimped).
Bestseller No. 6
XtremeAmazing Blue 10.4mm Spark Plug Wires Set Compatible with Harley Davidson Big Twin FXD Dyna Softail
  • Color: Blue
  • Great for replacement wire, relocation kits, new look, bobbers, scramblers, cafe racer etc
  • Compatible with Harley-Davidson Dyna 2000-2017, Softail 1999-2017
  • Package Contents: 1x 8" long 10.4mm width wire pre-crimped, 1x 20" long 10.4mm width wire pre-crimped
Bestseller No. 7
Aokus Blue 10mm Spark Plug Wires Compatible with Harley Davidson 883 1200 Sportster XL 86-03
  • Fitment:1996 - 2003 Harley-DavidsonXL 1200C Custom, 1996 - 1997 Harley-DavidsonXL 1200S Sport, 1999 - 2003 Harley-DavidsonXL 883C Custom, 2002 - 2003 Harley-DavidsonXL 883R, 1986 - 1987 Harley-DavidsonXLH 1100, 1988 - 2003 Harley-DavidsonXLH 1200, 1986 - 2003 Harley-DavidsonXLH 883, 1986 - 1995 Harley-DavidsonXLH 883 Deluxe, 1987 - 2003 Harley-DavidsonXLH 883 Hugger
  • 10mm high performance ignition wires available for street or race applications
  • Perfect Fitment, directly replacement. Made of high quality material, reliable quality and durable.
  • Constructed with silicone throughout the jacket, insulation and core to deliver high-temperature resistance
  • Package includes: 2 * blue Spark Plug Wires (one 8." and one 20" long wires pre-crimped)
Bestseller No. 8
TONRYCUE 10mm Spark Plug Wires Compatible with Harley Davidson Softail FXST FLST 1984-1999
  • Fitment: for Harley Davidson Softail 1984-1999
  • Material: made of high quality material, reliable quality and durable
  • Package Included: 2* red spark plug wires
  • Note: Please make sure the car's model if fit your car or not before you order
Bestseller No. 9
Aokus 8.8mm Spark Plug Wire Set 144022 Compatible with Harley Davidson FLH 80 1200 lectra Glide FLHS 80 Electra Glide Sport FXDB Dyna FXDS-Conv FXE 1200
  • ▲Part number:144022
  • ▲Fits for many Harley Davidson models ( please refer to the below description)
  • ▲Constructed with silicone throughout the jacket, insulation and core to deliver high temperature resistance.
  • ▲Rated at SAE Class E J2031 with a continuous operating temperature of 450 F.
  • ▲DIAMETER8.8 MM
Bestseller No. 10
XtremeAmazing Red 10.4mm Spark Plug Wires Set Compatible with Harley Davidson Big Twin FXD Dyna Softail
  • Color: Red
  • Great for replacement wire, relocation kits, new look, bobbers, scramblers, cafe racer etc.
  • Compatible with Harley-Davidson Dyna 2000-2017, Softail 1999-2017
  • Package Contents: 1x 8" long 10.4mm width wire pre-crimped, 1x 20" long 10.4mm width wire pre-crimped

Top Brands for Ignition Cable for Harley

ACCEL: The ACCEL brand product line includes harnesses and sensors for any vehicle, including Harley Davidson motorcycles.

Aokus: It offers many different ignition cables for numerous motorcycle brands, especially Harley.

JBSporty: The JBSporty brand is of superior quality, offering various styles, colors and fits for Harley motorcycles.

Sumax: It Manufactures top-notch products for different motorcycles, including Harley.

ACDelco: It manufactures high-quality aftermarket automotive parts with renowned expertise and a worldwide presence.

DENSO: The DENSO brand was created in 1949 DENSO also produces ignition cables.

Signs of Bad Spark Plug Wire

1. A rattling noise in the engine

It is often created by an ignition coil shorting out because of wear and tear to its insulation coating.

2. Hard to start when cold due to unburned fuel in the exhaust system

This issue may develop when a spark plug wire runs too close to the exhaust manifold, and the heat begins melting insulation off the wires.

3. The cranking speed

This often occurs when breakage in an ignition coil causes it to short out and increase the voltage in one of the cylinders; thus, that cylinder’s rpm will go up on its own.

4. It Starts fine but stalls as you drive along

When a spark plug wire breaks apart inside its protective covering during engine operation, it can cause this problem by providing insufficient electrical power to an individual cylinder.

Damaged Spark Plug Wire – Testing and Fixing

Not necessarily your spark plug wire goes up to its maximum lifespan. Due to electrical or accidental issues, it may even get damaged sooner. Here is how can you find damaged wire and how can you fix that:

  • Turn the key on and put the meter across the two wires from the distributor.
  • Remove the distributor cap and rotor
  • Remove the two wires from the distributor by twisting them off or sticking a small screwdriver between the wire and the connector.
  • Turn the ignition key back to the run position and stick your multimeter probe in between each of the eight plug wire boots.
  • If there is no spark, you have a bad wire. You can test this by putting a 4-ohm load on it after taking off all eight wires. If there is no continuity, that wire is bad.
  • After you have fixed any problems, install all wires again.
  • Turn the key to run, put your meter on each wire as you go around them to make sure you have a good connection.
  • After putting your meter on all wires, go around it again to tighten them up.

Can You Test Spark Plug Wire without a Multimeter? How?

You can taste spark plug wire using a battery and a clip lead without the need for a multimeter. This is a quick and easy way to see if your spark plug wire has gone bad. This test will only show you if the wire has a short somewhere in its length.

Can Bad Spark Plug Wires Cause Backfire?

If spark plug wires malfunction, it can cause a ‘spark blow-out’ condition, leading to an engine misfire and even backfire. If left uncorrected, this misfire can ruin an engine pretty quickly.

Spark Plug Wire Lifespan

The average lifespan of a spark plug wire is about 60,000 to 70000 miles. It also depends on the motorcycle’s environment, under what conditions, and how they are maintained.

How to Change Spark Plug Wires? – Installing New Wires on H-D

Step 1 – Remove the distributor cap from your Harley engine with a ratchet.

Step 2 – Take out the old spark plug wires and install new ones. After you get them in, tighten their boots to ensure that the plugs have a solid connection to the wires.

Step 3 – Vacuum out your distributor housing with an air compressor at high velocity to remove any dust build-up.

Step 4 – Clean out the cap before reinstalling it onto your engine. This will result in a smooth fit between the cap and distributor

Step 5 – Look at the old spark plug wires and inspect them for cracks, wear, or any signs that they may be failing. If you spot anything wrong with them, replace the old ones as well.

Replacing Spark Plug without Changing Current Wire

The old wire corrodes and becomes brittle over time since it’s always in contact with the engine’s cylinder head. That heat causes oxidation, which wears it down. If you want to replace your plug without changing your current wire. Clean the old wire with sandpaper or emery cloth to eliminate any corrosion and dirt that might have accumulated.

Protection of Ignition Wire from Heat

You can protect your ignition wire from heat using Spark Plug Wire Protector Shield. It prevents accidental damage from getting the plug wire too hot while allowing full ignition performance. It clips directly over the spark plug and sticks to itself using a special adhesive, creating a sleeve that insulates the spark plug wires from engine heat and oil splash.

Concluding Remarks

A spark plug wire is an electrical system that uses a conductor to pass electrical current from the battery to your engine’s spark plugs. The wire itself becomes less conductive and can cause major problems when it wears down or becomes broken. Spark Plug Wire helps reduce misfires in engines and will help keep the engine running smoothly for longer periods. Replacing the wire is a simple process if you follow the tips listed above.

Last update on 2022-06-20  / Images from Amazon Product Advertising API

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Writer @ Motorcycleall.

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