1. Motorcycle Spark Plugs For Sale
  2. sku: 14081251799436762
  3. HARLEY DAVIDSON 31990-65C

HARLEY-DAVIDSON 31990-65C Nos Spark Plug Cable

fits model: Kh, Xlh. make: Harley. year: 1954–1970.

31990-65c Harley-davidson #31990-65c Genuine Nos Spark Plug Cable 1954-1970 Kh Xl Xlh

( Brand: Harley-davidson ), ( Manufacturer Part Number: 31990-65C ), ( Type: Spark Plug Cable ), ( Manufacturer Warranty: 1 Month ), ( Item Length: Approximately 34 ), ( Vintage Part: Yes ), ( Unit Quantity: One. ), ( Country Of Origin: United States )

Review HARLEY DAVIDSON #31990-65c Genuine Nos Spark Plug Cable Xl fits KH XLH 1954–1970

The **Harley-Davidson 31990-65C OEM No-Service (NOS) Spark Plug Cable** is a meticulously preserved, factory-sealed component designed exclusively for the iconic **1954 1970 Harley-Davidson models**, including the **KH, KL, XL, and XLH** series. Crafted from high-quality, heat-resistant rubber and reinforced with durable brass connectors, this plug cable is a direct replacement for the original equipment, ensuring an exact fit and seamless integration with the engine s ignition system. The **31990-65C** designation confirms its authenticity as a genuine Harley-Davidson part, free from aftermarket modifications or wear, making it an ideal choice for enthusiasts seeking to maintain or restore their vintage machine to its factory specifications. Its **no-service (NOS) condition** guarantees that the cable remains in pristine, unopened form, preserving its original performance characteristics and longevity. The cable s robust construction, featuring a tightly coiled, insulated wire core, is engineered to withstand the high voltages and mechanical stresses of Harley s classic ignition systems, delivering reliable spark generation for optimal engine performance. Whether used in a meticulously restored classic or as a critical component in a custom build, this plug cable embodies the timeless engineering of Harley-Davidson, ensuring a perfect blend of heritage and functionality for riders who demand nothing less than perfection.

### Pros and Cons of buying a Harley-Davidson Part Number 31990-65C (NOS Spark Plug Cable for 1954 1970 Models: XL, XLH)

#### **Pros:**

1. **Original Equipment Quality (OEM):** As a New Old Stock (NOS) part, this spark plug cable is manufactured to Harley-Davidson s original specifications, ensuring compatibility and reliability. OEM components are often built to stricter standards than aftermarket alternatives.

2. **Reliability and Durability:** Harley-Davidson s classic models from the 1950s 1970s were designed with robust components. A NOS spark plug cable, if in good condition, will perform consistently without frequent failures, reducing maintenance hassles.

3. **Historical Accuracy for Restoration:** If you re restoring a vintage Harley, using NOS parts preserves the original build quality and aesthetic. This is particularly valuable for collectors or enthusiasts who prioritize authenticity.

4. **Ease of Installation:** Spark plug cables are straightforward to replace, and since this is a direct-fit part, installation requires minimal effort. No modifications or additional tools are typically needed beyond basic motorcycle maintenance skills.

5. **Long-Term Cost Savings:** While NOS parts may have a higher upfront cost than aftermarket alternatives, their longevity can reduce the need for frequent replacements, saving money over time.

6. **Compatibility with Classic Engines:** The 1954 1970 Harley engines (especially the 74-cubic-inch flathead or 88-cubic-inch V-twin) were designed with specific clearances and electrical requirements. A NOS cable ensures proper spark delivery, which is critical for performance and ignition reliability.

7. **Resale Value:** For restored or well-maintained classic Harleys, NOS parts can enhance resale value, as buyers often seek original or high-quality replacement components.

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#### **Cons:**

1. **Higher Cost:** NOS parts are generally more expensive than aftermarket or used alternatives. The price reflects their age, rarity, and the fact that they were never installed on a bike (though some may have been stored unused for decades).

2. **Limited Availability:** Finding NOS parts can be challenging, especially for older Harley models. Availability depends on the seller s inventory, and stock may run out quickly, leading to delays or higher prices if multiple buyers compete.

3. **Potential for Counterfeit or Mismarked Parts:** The NOS market can be saturated with fakes or mislabeled parts. Buyers must verify the authenticity of the part, including checking the serial numbers, manufacturing dates, and condition. Sellers may not always provide clear documentation.

4. **Condition Variability:** Even NOS parts can degrade over time if stored improperly (e.g., exposure to moisture, heat, or dust). Inspecting the cable for cracks, corrosion, or wear is essential before purchase.

5. **No Warranty:** NOS parts typically come with no warranty, unlike new aftermarket parts. If the cable fails shortly after installation, you ll bear the full cost of replacement.

6. **Electrical Wear Over Time:** While NOS, the cable may still show signs of age, such as brittle rubber or corroded connectors. If the cable has been stored for decades, its internal resistance or insulation could degrade, affecting ignition performance.

7. **Alternative Aftermarket Options:** Aftermarket spark plug cables (e.g., from brands like *Harley-Davidson Performance Parts* or *Mellblom*) are often more affordable and may offer modern improvements like better heat resistance or corrosion protection. These can be a practical compromise for non-restoration projects.

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### **Conclusion:**

Buying a NOS spark plug cable for your 1954 1970 Harley-Davidson (XL/XLH) is a worthwhile investment if you prioritize authenticity, long-term reliability, and historical accuracy especially for restoration projects. The part s OEM quality and compatibility make it ideal for enthusiasts who value original components. However, the higher cost, limited availability, and potential for counterfeit parts require careful consideration. If budget or convenience is a concern, aftermarket alternatives may suffice for non-restoration use.

### **Recommendation:** - **Purchase NOS if:**

- You are restoring a classic Harley and want to maintain original specifications.

- You have verified the part s authenticity (e.g., through a reputable seller with documentation).

- You are willing to pay a premium for OEM reliability and historical value.

- **Consider aftermarket alternatives if:**

- You are not restoring and need a cost-effective solution.

- You can find a high-quality aftermarket cable (e.g., from *Mellblom* or *Harley-Davidson Performance*) that meets your performance needs.

- You prioritize warranty coverage and easier availability.

Always inspect the NOS part thoroughly before purchasing, and test it after installation to ensure proper spark delivery. For peace of mind, consult a mechanic familiar with vintage Harley engines if you re unsure about the cable s condition.

Details:

Please see all 7 pictures above for condition and details. Comes in Original Unopened Harley-Davidson Package. NOS-New Old Stock. Harley-Davidson Part #31990-65C.

Please do your homework and verify fitment for year model application before buying. Genuine Harley-Davidson Spark Plug Cable. LOCATION-GD16 Made In USA. Fits Harley-Davidson KH, XL, XLH model's 1954-1970.

Excellent NOS condition.

part #: 3199065c prices

  • $28.95-$30.50

specifications cyclesparkplugs:

  • for models: Kh, Xlh
  • for makes: Harley
  • for years: 1954-1970
  • brand: Harley-davidson
  • mpn: 31990-65c
  • type: Spark Plug Cable
  • manufacturer warranty: 1 Month
  • item length: Approximately 34
  • vintage part: Yes
  • unit quantity: One.
  • country of origin: United States

payments cyclesparkplugs:

  • credit card: Mastercard
  • wallet: Apple-pay
  • other

seller cyclesparkplugs:

  • city: Logan, Ohio
  • # reviews: 10558
  • rating: 100.0%

offer cyclesparkplugs:

  • started: April 10, 2026
  • quantity: 1
  • sold: 0
  • availability: In Stock
  • options: Ship-to-home

shipping cyclesparkplugs:

  • transit: 4-10 Days
  • cost: $6.95
  • type: Fixed
  • class: Standard
  • service: USPS Ground Advantage
  • carrier: USPS

returns cyclesparkplugs:

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

general cyclesparkplugs:

  • Motorcycle Scooter Parts Accessories > Electrical Ignition Components > Spark Plugs
  • condition: New other see details
for models: kh, xlh, for makes: harley, for years: 1954-1970, type: spark plug cable, manufacturer warranty: 1 month, item length: approximately 34, vintage part: yes, unit quantity: one., country of origin: united states,
category: motorcycle parts > motorcycle scooter parts accessories > electrical ignition components > spark plugs, sku: 14081251799436762,
Harley-davidson 31990-65C Is Similar To:
cyclesparkplugs logo
2 offers $28.95–$30.50 USD
  • New other (see details). Offer #1 priced at $28.95 + $6.95 shipping estimate = $35.90* total. Excellent NOS condition. Made In USA.+$6.95 shipping
  • New. Offer #2 priced at $30.50 + $5.97 shipping estimate = $36.47* total. HD B6 The product is a vintage Harley-Davidson 34" spark plug cable designed for models ranging from 1954 to 1970, including KH, XL, and XLH Sportster motorcycles.+$5.97 shipping

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