1. Motorcycle Intake & Fuel Systems Deals
  2. sku: 23302968541268603
  3. MOTION PRO 57-8599

MOTION PRO 57-8599 Fuel Injection Cleaner Connectors EV6

fits make: Harley, Davidson.

57-8599 Motion Pro Harley Davidson Fuel Injection Cleaner Pigtail Connectors - Ev6

( Brand: Motion Pro ), ( Manufacturer Part Number: 57-8599 ), ( Manufacturer Warranty: 1 Year ), ( Type: Injector Cleaner )

Review MOTION PRO Harley Davidson Fuel Injection Cleaner Pigtail Connectors Ev6

The **Harley-Davidson Motion Pro 57-8599 Fuel Injection Cleaner Connectors (EV6)** is a precision-engineered component designed to enhance the performance and longevity of Harley-Davidson s advanced fuel injection systems, particularly those equipped with the **Electronic Vehicle 6 (EV6)** architecture. These connectors are meticulously crafted to ensure a secure, corrosion-resistant, and reliable interface between the fuel injection cleaner and the vehicle s electronic control module (ECM), eliminating common issues such as loose connections, signal interference, or fuel system inefficiencies. Built with Harley-Davidson s high standards in mind, the connectors feature a robust, weather-sealed design that resists moisture, dust, and vibration critical factors for maintaining optimal fuel delivery and engine responsiveness in both on-road and off-road applications. Whether installed during routine maintenance or as part of a performance upgrade, these connectors provide a seamless integration with the **Motion Pro Fuel Injection Cleaner**, helping to restore and preserve the efficiency of the fuel system by preventing carbon buildup, improving throttle response, and reducing emissions. Ideal for Harley-Davidson models with **EV6 fuel injection**, including the **Sportster, Street Glide, Softail, and Touring series**, these connectors are a vital upgrade for riders seeking to optimize fuel flow, enhance engine performance, and extend the life of their motorcycle s critical components. Their compatibility with Harley s advanced electronic systems ensures compatibility with the **Motion Pro EV6 diagnostic and cleaning protocols**, making them an essential addition for any serious rider looking to maintain peak mechanical condition.

**Pros and Cons of buying a Harley-Davidson Motion Pro 57-8599 Fuel Injection Cleaner Connectors (EV6)**

### **Pros**

1. **Compatibility** Designed specifically for Harley-Davidson engines, particularly those with EV6 fuel injection systems (common in models like the Sportster, Softail, and some Touring bikes). This ensures a proper fit without modification.

2. **Performance Benefits** Fuel injection systems can accumulate carbon deposits over time, leading to reduced fuel efficiency, rough idling, or engine hesitation. This cleaner helps restore optimal fuel flow by removing deposits from injectors, throttle bodies, and intake valves, improving throttle response and overall engine performance.

3. **Preventative Maintenance** Regular use of fuel system cleaners can extend the lifespan of fuel injectors and prevent costly repairs by keeping the system running smoothly.

4. **Easy to Use** Typically comes in a bottle format that can be added directly to the fuel tank during refueling, requiring no additional tools or labor. Some versions may include a fuel additive that also lubricates the fuel pump and seals.

5. **Cost-Effective** Compared to professional fuel system cleaning (which can cost hundreds of dollars), this product is a low-cost solution for maintaining engine health.

6. **Brand Trust** Harley-Davidson s official Motion Pro line is designed to meet the manufacturer s standards, reducing the risk of compatibility issues or damage to the engine.

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### **Cons**

1. **Limited Scope** While effective for fuel injectors and throttle bodies, it does not address other engine components like spark plugs, air filters, or exhaust restrictions. For a comprehensive clean, additional treatments or services may be needed.

2. **Mixed Results with Severe Deposits** If the engine has significant carbon buildup (e.g., from years of neglect or poor fuel quality), a single treatment may not fully resolve the issue. Multiple uses or a more aggressive cleaner may be required.

3. **Potential for Short-Term Roughness** In some cases, the cleaner may temporarily worsen engine performance as it dislodges deposits, leading to minor hesitation or stumbling until the system clears. This is usually temporary and resolves within a few tankfuls of fuel.

4. **Dependence on Fuel Quality** If the bike frequently runs on low-quality fuel, the benefits of the cleaner may be short-lived. Regular use of high-quality fuel is recommended for long-term effectiveness.

5. **Not a Substitute for Professional Servicing** While convenient, it cannot replace regular maintenance tasks like oil changes, air filter replacements, or professional fuel system deep-cleaning services.

6. **Price Sensitivity** For riders on a tight budget, the cost of this product may seem negligible, but if used infrequently, the cumulative expense over time could add up. However, it is still cheaper than professional cleaning.

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### **Conclusion**

The Harley-Davidson Motion Pro 57-8599 Fuel Injection Cleaner Connectors (EV6) is a practical and effective tool for maintaining the health of a Harley-Davidson s fuel injection system. Its compatibility with EV6-equipped models, ease of use, and performance-enhancing benefits make it a worthwhile addition to routine maintenance. However, it is not a miracle cure for severely neglected engines and should be used as part of a broader maintenance strategy that includes high-quality fuel, regular servicing, and attention to other engine components.

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### **Recommendation**

**Buy it if:**

- You own a Harley-Davidson with an EV6 fuel injection system and want to maintain or improve engine performance.

- You are looking for a simple, cost-effective way to prevent fuel system issues without professional intervention.

- You use it regularly (e.g., every 3 6 months or as part of your fueling routine) alongside other maintenance tasks.

**Avoid or reconsider if:**

- Your bike has severe carbon buildup or you suspect major engine issues consider professional cleaning first.

- You are unwilling to follow up with high-quality fuel or other maintenance practices, as the cleaner s effects will be limited.

- You prefer a more aggressive or comprehensive cleaner for heavily used engines (though this product is generally safe for regular use).

**Final Verdict:** For most Harley-Davidson owners with EV6 systems, this product is a smart, low-risk investment in engine longevity and performance. Use it as part of a proactive maintenance routine, and pair it with other best practices for optimal results.

Details:

Replacement pigtail for the Motion Pro Harley Davidson Fuel Injection Cleaner. One of their goals is to offer tools convenience. Motion Pro tools are designed to be simple use, yet durable enough withstand the harshest conditions. Sold individually.

Do it right the first time with Motion Pro Tools.

part #: 578599 prices

  • $20.49-$38.51

specifications intakefuelmotorcycle:

  • for makes: Harley, Davidson
  • brand: Motion Pro
  • mpn: 57-8599
  • manufacturer warranty: 1 Year
  • type: Injector Cleaner

offer intakefuelmotorcycle:

  • sold: 0
  • availability: In Stock
  • started: April 5, 2026
  • options: Ship-to-home
  • quantity: 8

payments intakefuelmotorcycle:

  • other
  • wallet: Google-pay
  • credit card: Diners-club

seller intakefuelmotorcycle:

  • rating: 99.8%
  • city: Christiansburg, Virginia
  • # reviews: 49913

returns intakefuelmotorcycle:

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

general intakefuelmotorcycle:

  • Motorcycle Scooter Parts Accessories > Air Intake Fuel Delivery > Other Air Intake Fuel Delivery
  • condition: New

shipping intakefuelmotorcycle:

  • type: Fixed
  • cost: $6.95
  • class: Economy, Standard
  • transit: 9-14 Days
  • service: Economy, Standard
for makes: harley, davidson, manufacturer warranty: 1 year, type: injector cleaner,
category: motorcycle parts > motorcycle scooter parts accessories > air intake fuel delivery, sku: 23302968541268603,
Motion Pro 57-8599 Is Similar To:
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2 offers $20.49–$38.51 USD
  • New. Offer #1 priced at $20.49 + $7.00 shipping estimate = $27.49* total. Sold individually. Motion Pro tools are designed to be simple to use, yet durable enough to withstand the harshest conditions.+$7.00 shipping
  • New. Offer #2 priced at $38.51 + $0.00 shipping estimate = $38.51* total. Require aerosol can of fuel injection cleaner (not included). Kits include fuel injector cleaner tool, pigtail and 9V battery.FREE SHIPPING

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