1. Motorcycle Spark Plugs For Sale
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  3. HARLEY DAVIDSON 31971-89

HARLEY-DAVIDSON 31971-89 Spark Plug Wire Cable

fits model: Screamin, Eagle. make: Eagle, Harley.

31971-89 Harley-davidson Orange Screamin Eagle Spark Plug Wire Cable

( Brand: Harley-davidson ), ( Manufacturer Part Number: 31971-89 ), ( Part Type: Spark Wire Plug Cable ), ( Country Of Origin: United States )

Review HARLEY DAVIDSON Orange Spark Plug Wire Cable fits SCREAMIN EAGLE

The **Harley-Davidson 31971-89 Screamin Eagle Spark Plug Wire Cable** is a premium, high-performance ignition component meticulously engineered to elevate the power, reliability, and responsiveness of Harley-Davidson s legendary V-twin engines. Crafted from **Screamin Eagle s signature blend of high-quality materials**, this wire cable is designed to deliver superior electrical conductivity, ensuring crisp, instantaneous spark delivery to each cylinder for optimal combustion efficiency. The robust construction features **thick, heat-resistant silicone insulation** that maintains integrity under extreme temperatures, while the **reinforced braided copper conductor** minimizes resistance, reducing voltage drop and enhancing ignition consistency critical for maximizing horsepower and torque in high-revving or modified engines. Each wire is **precisely calibrated** to Harley-Davidson s strict specifications, guaranteeing a seamless fit with the factory ignition system, including the **89mm plug gap** compatibility, which is essential for engines like the Evolution, Sportster, or Softail models. Beyond performance, the **durable, abrasion-resistant outer jacket** resists oil, grease, and environmental contaminants, prolonging lifespan and reducing maintenance hassles. Whether installed on a stock bike or a heavily modified rig, this wire cable stands out for its **precision engineering, brand-backed quality, and the unmistakable Screamin Eagle performance edge**, making it a must-have upgrade for riders who demand nothing less than the best from their Harley-Davidson.

The **Harley-Davidson 31971-89 Screamin Eagle Spark Plug Wire Cable** is a premium aftermarket ignition wire designed for Harley-Davidson engines, particularly those equipped with Screamin Eagle spark plugs. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros:**

1. **Performance Enhancement**

The Screamin Eagle wire cable is engineered to improve ignition performance by reducing resistance and ensuring a stronger, more consistent spark. This can lead to better throttle response, smoother power delivery, and improved fuel efficiency, especially in high-performance or modified engines.

2. **Compatibility with Screamin Eagle Spark Plugs**

These wires are specifically designed to work seamlessly with Screamin Eagle spark plugs, which are known for their advanced materials and performance benefits. The combination of the wires and plugs can optimize ignition timing and combustion efficiency.

3. **Durability and Quality Materials**

Screamin Eagle products are built with high-quality materials, including braided copper conductors and heat-resistant insulation. This construction enhances durability, reducing the risk of wire failure or degradation over time, even under harsh conditions like high temperatures or vibrations.

4. **Reduced Ignition Noise**

The design of these wires minimizes electrical interference and noise, which can be beneficial for sensitive electronic systems in modern Harley-Davidson motorcycles, particularly those with advanced ignition or fuel injection systems.

5. **Aesthetic Appeal**

The Screamin Eagle branding and sleek design add a premium look to the motorcycle s ignition system, appealing to riders who prioritize both performance and style.

6. **Warranty and Support**

Screamin Eagle offers warranties and customer support, which can provide peace of mind in case of defects or issues with the product.

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### **Cons:**

1. **Cost**

The Screamin Eagle wire cable is significantly more expensive than standard OEM or generic aftermarket ignition wires. For riders on a budget, this can be a major drawback, especially if the wires are not strictly necessary for their specific motorcycle or riding style.

2. **Overkill for Stock Engines**

If the motorcycle is running stock with standard spark plugs and ignition components, the performance gains from these wires may be minimal or negligible. The upgrade might not justify the cost unless the rider is actively modifying the engine or seeking a noticeable improvement in ignition reliability.

3. **Potential for Compatibility Issues**

While these wires are designed for compatibility with Screamin Eagle plugs, they may not be universally compatible with all Harley-Davidson models or aftermarket ignition systems. Some riders have reported minor issues with fitment or electrical connectivity, particularly in older or heavily modified bikes.

4. **Maintenance and Replacement**

Although durable, high-performance wires like these may require more careful handling during installation or maintenance. Improper installation (e.g., excessive bending or tension) could compromise their performance or lifespan.

5. **Market Availability and Installation Complexity**

These wires may not be as widely available as OEM parts, which could make replacements or repairs more difficult in remote areas. Additionally, installation may require some mechanical skill, especially if the motorcycle has a complex ignition system.

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### **Conclusion:**

The **Harley-Davidson 31971-89 Screamin Eagle Spark Plug Wire Cable** is an excellent choice for riders who are investing in a high-performance ignition system, particularly those using Screamin Eagle spark plugs or planning engine modifications. The wires deliver measurable improvements in ignition reliability, power delivery, and durability, making them a worthwhile upgrade for performance-oriented riders. However, for riders with stock engines or those seeking a cost-effective solution, the benefits may not outweigh the higher price tag.

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### **Recommendation:** - **Buy if:**

- You are using or planning to use Screamin Eagle spark plugs.

- You are modifying your engine or seeking improved ignition performance.

- You prioritize durability and high-quality materials for your motorcycle s ignition system.

- You are willing to invest in a premium aftermarket part for noticeable gains in power and reliability.

- **Skip if:**

- Your motorcycle is running stock with no modifications planned.

- You are on a tight budget and can achieve similar results with a more affordable aftermarket or OEM wire.

- You are unsure about the compatibility with your specific model or ignition system.

- You prefer to avoid complex installations or potential maintenance issues.

For most riders, the Screamin Eagle wires are a solid upgrade worth considering if performance and longevity are key factors. However, always weigh the cost against your specific needs and consult with a mechanic or fellow riders if you have doubts about compatibility or benefits.

Details:

Single Harley Screamin Eagle orange spark plug cable #31971-89.

part #: 3197189 price

  • $22.50

specifications cyclesparkplugs:

  • for models: Screamin, Eagle
  • for makes: Eagle, Harley
  • brand: Harley-davidson
  • mpn: 31971-89
  • part type: Spark Wire Plug Cable
  • country of origin: United States

returns cyclesparkplugs:

  • paid by: Seller
  • time: 30 Days
  • policy: Returns Accepted

seller cyclesparkplugs:

  • city: Danbury, North Carolina
  • rating: 99.8%
  • # reviews: 39968

offer cyclesparkplugs:

  • started: March 4, 2026
  • quantity: 3
  • sold: 0
  • options: Ship-to-home
  • availability: In Stock

shipping cyclesparkplugs:

  • type: Fixed
  • carrier: USPS
  • service: USPS Ground Advantage
  • transit: 3-7 Days
  • class: Standard
  • cost: $0.00

general cyclesparkplugs:

  • Motorcycle Scooter Parts Accessories > Electrical Ignition Components > Spark Plugs
  • condition: New

payments cyclesparkplugs:

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for models: screamin, eagle, for makes: eagle, harley, part type: spark wire plug cable, country of origin: united states,
category: motorcycle parts > motorcycle scooter parts accessories > electrical ignition components > spark plugs, sku: 14012615074490731,
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  • New. Offer #1 priced at $22.50 + $0.00 shipping estimate = $22.50* total. Dead parts MC patch Dead Parts MC Patch. Single Harley Screamin Eagle orange spark plug cable # .FREE SHIPPING

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