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Unlock Your Harley-Davidson’s Performance with the Ultimate Spark Plug Chart

As a seasoned Harley-Davidson enthusiast, I know the importance of having the right spark plug for optimal performance. Navigating through the world of spark plugs can be overwhelming, but fear not – I’m here to shed light on the subject. Understanding the Harley-Davidson spark plug chart is key to keeping your ride running smoothly and efficiently.

Whether you’re a new rider or a seasoned veteran, having the correct spark plug can make all the difference in your bike’s performance. In this article, I’ll break down the intricacies of the Harley-Davidson spark plug chart, helping you make informed decisions when it comes to maintaining your beloved machine. Let’s dive in and demystify the world of spark plugs together.

Importance of Using the Correct Spark Plug

Using the correct spark plug is vital for ensuring optimal performance in Harley-Davidson motorcycles. Spark plugs play a crucial role in the ignition process, affecting everything from engine power to fuel efficiency.

When selecting a spark plug, it’s essential to consider factors such as the heat range, electrode material, and reach to match the specific requirements of your Harley-Davidson bike. Ignoring these details can lead to issues like misfires, poor acceleration, and even engine damage.

Harley-Davidson’s spark plug chart provides valuable information on the recommended spark plugs for different models and engine types. By consulting this chart, riders can make informed decisions that directly impact their motorcycle’s performance and longevity.

Remember, the spark plug is a small yet critical component that can make a significant difference in how your Harley-Davidson motorcycle runs. By using the correct spark plug based on the manufacturer’s guidelines, you can ensure smooth operation and get the most out of your riding experience.

Understanding Harley Davidson Spark Plug Codes

Deciphering Heat Range

When looking at Harley Davidson spark plug codes, understanding the heat range is crucial. Heat range determines how fast the spark plug can transfer heat from the combustion chamber. A lower number indicates a colder heat range, while a higher number means a hotter heat range. It’s essential to choose the right heat range to prevent issues such as pre-ignition or fouling.

Interpreting Thread Reach

The thread reach in spark plug codes refers to the length of the threaded portion of the spark plug. It’s essential to match the correct thread reach to ensure proper installation and optimal performance. Using a spark plug with the wrong thread reach can lead to poor ignition, misfiring, or even engine damage.

Identifying Electrode Configurations

Electrode configurations in spark plugs play a significant role in ignition and combustion efficiency. Single electrode spark plugs have one central electrode, while dual electrode spark plugs have an additional ground electrode. Understanding the electrode configuration in Harley Davidson spark plug codes is essential for choosing the right spark plug for your motorcycle model and engine type.

Iridiuim Spark Plug vs Standard

When it comes to Iridium Spark Plugs versus Standard Spark Plugs, the choice can significantly impact the performance of your Harley-Davidson motorcycle. Here’s a breakdown to help you understand the difference:

  • Iridium Spark Plugs:
  • Last longer than standard plugs due to their exceptional durability.
  • Provide better ignitability and improved throttle response.
  • Are ideal for high-performance engines and demanding riding conditions.
  • Affordable option for regular maintenance.
  • Suitable for riders with standard riding habits and who don’t push their bikes to the limit.

I personally recommend Iridium Spark Plugs for Harley-Davidson owners looking to maximize performance and reliability. The initial investment is worth the long-term benefits, ensuring your motorcycle runs smoothly and efficiently mile after mile.

For Harley Davidson models, choosing the right spark plug is crucial for optimal performance and longevity. Here are some recommended spark plugs based on Harley Davidson top models:

  • Harley Davidson Sportster: NGK Iridium IX Spark Plugs
  • Harley Davidson Softail: Bosch Platinum Plus Spark Plugs
  • Harley Davidson Touring: E3 DiamondFire Spark Plugs
  • Harley Davidson Dyna: Champion Double Platinum Power Spark Plugs

Remember, selecting the correct spark plug for your Harley Davidson motorcycle can make a significant difference in its overall performance and efficiency. Well lets get the Spark Plug Cross Reference for Most of the Harley Models.

ModelStandard PlugIridium PlugElectrode Gap
BREAKOUTNGK DCPR7ENGK DCPR7EIX 
BREAKOUT (EURO 4)NGK DCPR7ENGK DCPR7EIX 
BREAKOUT PRO STREET   
CVO ROAD GLIDE CUSTOM   
CVO SOFTAIL CONVERTIBLENGK DCPR8ENGK DCPR8EIX 
CVO SOFTAIL DELUXENGK DCPR7ENGK DCPR7EIX 
CVO STREET GLIDENGK DCPR7ENGK DCPR7EIX 
CVO STREET GLIDE (114 CUI)NGK CR9EIX 0.8-0.9 MM
CVO STREET GLIDE (117 CUI)   
DUO GLIDE (PANHEAD)NGK R5670-5  
DYNA FAT BOBNGK DCPR8ENGK DCPR8EIX1.0 MM
DYNA FAT BOBNGK DCPR8ENGK DCPR8EIX1.0 MM
DYNA FAT BOBNGK DCPR8ENGK DCPR8EIX1.0 MM
DYNA FAT BOB (EURO 4)NGK DCPR7ENGK DCPR7EIX 
DYNA GLIDE CONVERTIBLENGK BPR5ES-11NGK BPR5EIX-111.1 MM
DYNA GLIDE LOW RIDERNGK DCPR7ENGK DCPR7EIX0.8 MM
DYNA GLIDE LOW RIDERNGK DCPR8ENGK DCPR8EIX1.0 MM
DYNA GLIDE LOW RIDER (EVOLUTION)NGK BPR5ES-11NGK BPR5EIX-111.1 MM
DYNA GLIDE LOW RIDER (TWIN CAM)NGK DCPR7ENGK DCPR7EIX0.8 MM
DYNA LOW RIDERNGK DCPR7ENGK DCPR7EIX 
DYNA LOW RIDER (EURO 4)NGK DCPR7ENGK DCPR7EIX 
DYNA LOW RIDER SNGK DCPR7ENGK DCPR7EIX 
DYNA STREET BOBNGK DCPR7ENGK DCPR7EIX0.8 MM
DYNA STREET BOBNGK DCPR8ENGK DCPR8EIX1.0 MM
DYNA STREET BOBNGK DCPR8ENGK DCPR8EIX1.0 MM
DYNA STREET BOB (EURO 4)NGK DCPR7ENGK DCPR7EIX 
DYNA SUPER GLIDENGK BPR5ES-11NGK BPR5EIX-111.1 MM
DYNA SUPER GLIDENGK DCPR7ENGK DCPR7EIX0.8 MM
DYNA SUPER GLIDE CUSTOMNGK DCPR7ENGK DCPR7EIX0.8 MM
DYNA SUPER GLIDE CUSTOMNGK DCPR8ENGK DCPR8EIX1.0 MM
DYNA SUPER GLIDE CUSTOMNGK DCPR7ENGK DCPR7EIX 
DYNA SUPER GLIDE SPORTNGK DCPR7ENGK DCPR7EIX0.8 MM
DYNA SUPER GLIDE T-SPORTNGK DCPR7ENGK DCPR7EIX0.8 MM
DYNA SWITCHBACKNGK DCPR7ENGK DCPR7EIX 
DYNA SWITCHBACKNGK DCPR7ENGK DCPR7EIX 
DYNA WIDE GLIDENGK DCPR8ENGK DCPR8EIX1.0 MM
DYNA WIDE GLIDENGK DCPR8ENGK DCPR8EIX1.0 MM
DYNA WIDE GLIDENGK DCPR7ENGK DCPR7EIX 
DYNA WIDE GLIDE (EURO 4)NGK DCPR7ENGK DCPR7EIX 
DYNA WIDE GLIDE (EVOLUTION)NGK BPR5ES-11NGK BPR5EIX-111.1 MM
DYNA WIDE GLIDE (TWIN CAM)NGK DCPR7ENGK DCPR7EIX0.8 MM
E / EL KNUCKLEHEAD (61 CUI / OHV)   
ELECTRA GLIDE ULTRA CLASSICNGK DCPR7ENGK DCPR7EIX 
ELECTRA-GLIDE 1200 (SHOVELHEAD)-74: NGK XR575-: NGK BPR5ES-11-74:0.7 / 75-:1.1 MM
ELECTRA-GLIDE 1340 (SHOVELHEAD)NGK BPR5ES-11NGK BPR5EIX-111.0 MM
ELECTRA-GLIDE CLASSICNGK BPR5ES-11NGK BPR5EIX-111.1 MM
ELECTRA-GLIDE CLASSIC   
ELECTRA-GLIDE STANDARDNGK BPR5ES-11NGK BPR5EIX-111.1 MM
ELECTRA-GLIDE STANDARDNGK DCR7ENGK DCPR7EIX0.8 MM
ELECTRA-GLIDE STANDARDNGK DCPR8ENGK DCPR8EIX1.0 MM
ELECTRA-GLIDE ULTRA CLASSICNGK BPR5ES-11NGK BPR5EIX-111.1 MM
ELECTRA-GLIDE ULTRA CLASSICNGK DCPR8ENGK DCPR8EIX1.0 MM
ELECTRA-GLIDE ULTRA CLASSIC   
ELECTRA-GLIDE ULTRA CLASSIC (TWIN CAM)NGK DCPR7ENGK DCPR7EIX0.8 MM
ELECTRA-GLIDE ULTRA LIwithED / LOW   
ELECTRA-GLIDE ULTRA LIwithED / LOWNGK CR9ENGK CR9EIX 
FAT BOY (EVOLUTION)NGK BPR5ES-11NGK BPR5EIX-111.1 MM
FAT BOY (TWIN CAM)NGK DCPR7ENGK DCPR7EIX1.0 MM
FAT BOY INJECTION (TWIN CAM)NGK DCPR7ENGK DCPR7EIX0.8 MM
FAT BOY SNGK DCPR7ENGK DCPR7EIX 
FAT BOY / FAT BOY SPECIAL (FLSTFB)NGK DCPR8ENGK DCPR8EIX1.0 MM
FAT BOY / FAT BOY SPECIAL (FLSTFB)NGK DCPR7ENGK DCPR7EIX 
FAT BOY / FAT BOY SPECIAL (FLSTFB)NGK DCPR7ENGK DCPR7EIX 
FORTY-EIGHTNGK DCPR8ENGK DCPR8EIX1.0 MM
FORTY-EIGHTNGK DCPR8ENGK DCPR8EIX1.0 MM
FORTY-EIGHT (EURO 4)NGK DCPR7ENGK DCPR7EIX1.0 MM
FREEWHEELER (EURO 4)NGK CR9ENGK CR9EIX 
FX 1200 SUPER GLIDE / FAT BOBNGK BPR5ES-11NGK BPR5EIX-111.1 MM
FX 1340 SUPER GLIDE / WIDE GLIDENGK BPR5ES-11NGK BPR5EIX-111.0 MM
FXR SUPER GLIDENGK BPR5ES-11NGK BPR5EIX-111.1 MM
HERITAGE SOFTAIL CLASSICNGK BPR5ES-11NGK BPR5EIX-111.1 MM
HERITAGE SOFTAIL CLASSICNGK DCPR7ENGK DCPR7EIX0.8 MM
HERITAGE SOFTAIL CLASSICNGK DCPR7ENGK DCPR7EIX0.8 MM
HERITAGE SOFTAIL CLASSICNGK DCPR8ENGK DCPR8EIX1.0 MM
HERITAGE SOFTAIL CLASSICNGK DCPR7ENGK DCPR7EIX 
HERITAGE SOFTAIL CLASSIC (EURO 4)   
HERITAGE SOFTAIL SPECIAL / NOSTALGIANGK BPR5ES-11NGK BPR5EIX-111.1 MM
HERITAGE SPRINGERNGK DCPR7ENGK DCPR7EIX0.8 MM
HYDRA GLIDE (PANHEAD)NGK R5670-5  
LIVEWIRE   
NIGHT RODNGK DCPR8ENGK DCPR8EIX1.0 MM
NIGHT ROD SPECIALNGK DCPR8ENGK DCPR8EIX1.0 MM
NIGHT ROD SPECIALNGK DCPR8ENGK DCPR8EIX1.0 MM
NIGHT ROD SPECIAL / ABSNGK DCPR8ENGK DCPR8EIX1.0 MM
ROAD GLIDE (107 CUI)NGK CR9ENGK CR9EIX 
ROAD GLIDE SPECIALNGK DCPR7ENGK DCPR7EIX 
ROAD GLIDE SPECIAL (EURO 4)NGK CR9ENGK CR9EIX0.8 – 0.9 MM
ROAD GLIDE ULTRANGK DCPR7ENGK DCPR7EIX 
ROAD GLIDE ULTRA (EURO 4)CHAMPION P-RG6HCC  
ROAD KINGNGK BPR5ES-11NGK BPR5EIX-111.1 MM
ROAD KINGNGK DCPR8ENGK DCPR8EIX1.0 MM
ROAD KING (EURO 4)NGK CR9ENGK CR9EIX 
ROAD KING (TWIN CAM)NGK DCPR7ENGK DCPR7EIX0.8 MM
ROAD KING CLASSICNGK DCPR8ENGK DCPR8EIX1.0 MM
ROAD KING CLASSICNGK DCPR7ENGK DCPR7EIX 
ROAD KING CLASSICNGK DCPR7ENGK DCPR7EIX 
ROAD KING CLASSIC (EURO 4)   
ROAD KING CLASSIC (TWIN CAM)NGK DCPR7ENGK DCPR7EIX0.8 MM
ROAD KING CUSTOMNGK DCPR7ENGK DCPR7EIX0.8 MM
ROAD KING CUSTOMNGK DCPR8ENGK DCPR8EIX1.0 MM
ROAD KING SPECIAL (EURO 4)NGK CR9ENGK CR9EIX 
ROCKERNGK DCPR8ENGK DCPR8EIX1.0 MM
ROCKER CNGK DCPR8ENGK DCPR8EIX1.0 MM
SEVENTY-TWONGK DCPR8ENGK DCPR8EIX1.0 MM
SOFTAIL BAD BOYNGK BPR5ES-11NGK BPR5EIX-111.1 MM
SOFTAIL BLACKLINENGK DCPR8ENGK DCPR8EIX1.0 MM
SOFTAIL BREAKOUT (107 CUI)NGK CR9EIX  
SOFTAIL BREAKOUT (114 CUI)NGK CR9EIX  
SOFTAIL CROSS BONESNGK DCPR8ENGK DCPR8EIX1.0 MM
SOFTAIL CUSTOMNGK DCPR8ENGK DCPR8EIX1.0 MM
SOFTAIL CUSTOM (EVOLUTION)NGK BPR5ES-11NGK BPR5EIX-111.1 MM
SOFTAIL DELUXENGK DCPR7ENGK DCPR7EIX0.8 MM
SOFTAIL DELUXENGK DCPR8ENGK DCPR8EIX1.0 MM
SOFTAIL DELUXENGK DCPR7ENGK DCPR7EIX 
SOFTAIL DELUXENGK DCPR7ENGK DCPR7EIX 
SOFTAIL DELUXE (107 CUI)NGK CR9ENGK CR9EIX 
SOFTAIL DEUCENGK DCPR7ENGK DCPR7EIX0.8 MM
SOFTAIL FAT BOB (107 CUI)NGK CR9EIX  
SOFTAIL FAT BOB (114 CUI)NGK CR9EIX  
SOFTAIL FAT BOY (107 CUI)NGK CR9EIX  
SOFTAIL FAT BOY (114 CUI)NGK CR9EIX  
SOFTAIL FXDR (DESTROYER) 114 CUINGK CR9EIX  
SOFTAIL HERITAGE CLASSIC (107 CUI)NGK CR9ENGK CR9EIX 
SOFTAIL HERITAGE CLASSIC (114 CUI)NGK CR9EIX  
SOFTAIL HERITAGE SPRINGERNGK BPR5ES-11NGK BPR5EIX-111.1 MM
SOFTAIL LOW RIDER (107 CUI)NGK CR9ENGK CR9EIX 
SOFTAIL LOW RIDER S (114 CUI)NGK CR9EIX  
SOFTAIL NIGHT TRAINNGK DCPR8ENGK DCPR8EIX1.0 MM
SOFTAIL NIGHT TRAIN (EVOLUTION)NGK BPR5ES-11NGK BPR5EIX-111.1 MM
SOFTAIL NIGHT TRAIN (TWIN CAM)NGK DCPR7ENGK DCPR7EIX0.8 MM
SOFTAIL SLIMNGK DCPR7ENGK DCPR7EIX1.0 MM
SOFTAIL SLIM (107 CUI)NGK CR9ENGK CR9EIX 
SOFTAIL SLIM (EURO 4)NGK DCPR7ENGK DCPR7EIX1.0 MM
SOFTAIL SLIM SNGK DCPR7ENGK DCPR7EIX 
SOFTAIL SPORT GLIDE (107 CUI)NGK CR9ENGK CR9EIX 
SOFTAIL SPRINGER (EVOLUTION)NGK BPR5ES-11NGK BPR5EIX-111.1 MM
SOFTAIL SPRINGER (TWIN CAM)NGK DCPR7ENGK DCPR7EIX0.8 MM
SOFTAIL SPRINGER CLASSICNGK DCPR7ENGK DCPR7EIX0.8 MM
SOFTAIL SPRINGER CLASSICNGK DCPR8ENGK DCPR8EIX1.0 MM
SOFTAIL STANDARDNGK DCPR7ENGK DCPR7EIX0.8 MM
SOFTAIL STREET BOB (107 CUI)NGK CR9ENGK CR9EIX 
SPORT GLIDE (FXRT)NGK BPR5ES-11NGK BPR5EIX-111.1 MM
SPORTSTER 1000 (XLH / XLT / XLS / XLX)NGK B-6L (71-78)BPR6HS-10 (79-85)1.0 MM
SPORTSTER 1100NGK DCPR7ENGK DCPR7EIX0.8 MM
SPORTSTER 1200NGK DCPR7ENGK DCPR7EIX1.0 MM
SPORTSTER 1200 CUSTOMNGK DCPR7ENGK DCPR7EIX1.0 MM
SPORTSTER 1200 CUSTOMNGK DCPR7E (-07)NGK DCPR8E (07-)1.0 MM
SPORTSTER 1200 CUSTOMNGK DCPR8ENGK DCPR8EIX1.0 MM
SPORTSTER 1200 CUSTOM (EURO 4)NGK DCPR7ENGK DCPR7EIX 
SPORTSTER 1200 CUSTOMNGK DCPR7ENGK DCPR7EIX 
SPORTSTER 1200 CUSTOMNGK DCPR7ENGK DCPR7EIX1.0 MM
SPORTSTER 1200 IRONNGK DCPR7ENGK DCPR7EIX 
SPORTSTER 1200 LOWNGK DCPR8ENGK DCPR8EIX1.0 MM
SPORTSTER 1200 NIGHTSTERNGK DCPR8ENGK DCPR8EIX1.0 MM
SPORTSTER 1200 ROADSTERNGK DCPR7E (-07)NGK DCPR8E (07-)1.0 MM
SPORTSTER 1200 ROADSTER (EURO 4)NGK DCPR7ENGK DCPR7EIX1.0 MM
SPORTSTER 1200 SPORTNGK DCPR7ENGK DCPR7EIX1.0 MM
SPORTSTER 1200 SUPER LOWNGK DCPR8ENGK DCPR8EIX1.0 MM
SPORTSTER 1200 SUPER LOW (EURO 4)NGK DPR7ENGK DPR7EIX 
SPORTSTER 883 DELUXENGK DPR7EA-9NGK DPR7EIX-90.9 MM
SPORTSTER 883 HUGGERNGK DPR7EA-9NGK DPR7EIX-90.9 MM
SPORTSTER 883 IRONNGK DCPR7ENGK DCPR7EIX0.9 MM
SPORTSTER 883 IRON (EURO 4)NGK DCPR7ENGK DCPR7EIX 
SPORTSTER 883 RNGK DPR7EA-9NGK DPR7EIX-90.9 MM
SPORTSTER 883 R ROADSTERNGK DCPR7ENGK DCPR7EIX0.9 MM
SPORTSTER 883 STANDARD / DELUXENGK DPR7EA-9NGK DPR7EIX-90.9 MM
SPORTSTER 883 SUPERLOWNGK DCPR7ENGK DCPR7EIX0.9 MM
SPORTSTER 883 SUPERLOW (EURO 4)NGK DCPR7ENGK DCPR7EIX 
SPORTSTER 883 / LOWNGK DCPR7ENGK DCPR7EIX0.9 MM
SPORTSTER 900 (XLH / XLCH)NGK B6L 1.0 MM
SPORTSTER CUSTOM 53NGK DPR7EA-9NGK DPR7EIX-90.9 MM
SPORTSTER CUSTOM 53 / CUSTOMNGK DCPR7ENGK DCPR7EIX0.9 MM
STREET 750NGK CR9ENGK CR9EIX 
STREET 750 (EURO 4)NGK CR9ENGK CR9EIX 
STREET GLIDENGK DCPR8ENGK DCPR8EIX1.0 MM
STREET GLIDENGK DCPR7ENGK DCPR7EIX 
STREET GLIDENGK DCPR7ENGK DCPR7EIX 
STREET GLIDE (107 CUI)NGK CR9ENGK CR9EIX 
STREET GLIDE SPECIALNGK DCPR7ENGK DCPR7EIX 
STREET GLIDE SPECIAL (107 CUI) EURO 4NGK CR9ENGK CR9EIX 
STREET GLIDE SPECIAL (114 CUI)NGK CR9EIX  
STREET RODNGK DCPR8ENGK DCPR8EIX1.0 MM
STREET ROD 750 (EURO 4)NGK CR9ENGK CR9EIX 
TRI GLIDE ULTRANGK DCPR7ENGK DCPR7EIX 
TRI GLIDE ULTRA (EURO 4)NGK CR9ENGK CR9EIX 
V-ROD (A-MODELL)NGK DCPR8ENGK DCPR8EIX1.0 MM
V-ROD (B-MODELL)NGK DCPR8ENGK DCPR8EIX1.0 MM
V-ROD / ABSNGK DCPR8ENGK DCPR8EIX1.0 MM
V-ROD 10TH ANNIVERSARYNGK DCPR8ENGK DCPR8EIX1.0 MM
V-ROD MUSCLENGK DCPR8ENGK DCPR8EIX1.0 MM
V-ROD MUSCLENGK DCPR8ENGK DCPR8EIX1.0 MM
XLCR CAFE RACERNGK B6L 1.0 MM
XR 1000 (SPORTSTER)NGK BPR6ES-11NGK BPR6EIX-111.1 MM
XR 1200NGK DCPR8ENGK DCPR8EIX1.0 MM
XR 1200 XNGK DCPR8ENGK DCPR8EIX1.0 MM

Conclusion

Selecting the right spark plugs for your Harley-Davidson motorcycle is crucial for optimizing performance and ensuring longevity. From NGK Iridium IX Spark Plugs for the Sportster to Champion Double Platinum Power Spark Plugs for the Dyna, each model has specific recommendations to boost efficiency.

By choosing the correct spark plug, you can enhance overall performance and ride quality. Remember, the spark plug plays a significant role in the engine’s combustion process, so investing in the right one is essential for a smooth and powerful ride. Make sure to refer to the Harley Davidson spark plug chart for your specific model to keep your motorcycle running at its best.

Frequently Asked Questions

1. Why are spark plugs important for Harley-Davidson motorcycles?

Spark plugs play a crucial role in igniting the air-fuel mixture within the engine, ensuring optimal combustion and performance.

NGK Iridium IX Spark Plugs are recommended for Sportster models to improve ignition efficiency and performance.

3. What spark plugs are suitable for Harley-Davidson Softail bikes?

Bosch Platinum Plus Spark Plugs are ideal for Softail models, enhancing durability and ignition performance.

4. Which spark plugs are best for Harley-Davidson Touring motorcycles?

E3 DiamondFire Spark Plugs are recommended for Touring models to boost fuel efficiency and overall performance.

5. What spark plugs are suggested for Harley-Davidson Dyna bikes?

Champion Double Platinum Power Spark Plugs are the top choice for Dyna models, optimizing ignition and longevity.

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