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HARDDRIVE MN-KTN7 Throttle Slide Vacuum Membrane Fxdci MN/KTN7

fits make: Harley, Davidson. year: 2005–2006.

Ktn7 Harddrive Mn/ktn7 Throttle Slide Vacuum Membrane For 2005-2006 Harley Davidson Fxdci Tw

( Brand: Harddrive ), ( Manufacturer Part Number: MN/KTN7 ), ( Compatible Year: 2006 2005 ), ( Compatible Make: Harley Davidson ), ( Compatible Model: Fxdci Super Glide Custom ), ( Bundle Description: 1 Pc Genuine Harddrive Throttle Slide Vacuum Membrane ), ( Type: Throttle Slide Vacuum Membrane ), ( Core Charge: Free No Core Charge ), ( Fitment Type: Direct Replacement )

Review HARDDRIVE Mn/ktn7 Throttle Slide Vacuum Membrane Harley Davidson Fxdci Tw fits 2005–2006

The **MN/KTN7 Throttle Slide Vacuum Membrane** is a meticulously engineered aftermarket component designed specifically for the **2005 2006 Harley-Davidson FXDC (Iron 883) Twin Cam** engine, offering a refined solution for riders seeking improved throttle response, smoother power delivery, and enhanced reliability in the vacuum-actuated throttle system. Crafted from high-grade **butyl rubber**, this precision-molded membrane is built to withstand the demanding conditions of high-performance riding while maintaining a tight seal against the throttle slide, preventing leaks that can cause erratic idle, sluggish acceleration, or even complete throttle failure. Unlike stock OEM membranes, which are prone to cracking, warping, or degrading over time due to heat and vacuum fluctuations, the **KTN7** features a reinforced construction with optimized thickness and flexibility, ensuring consistent performance across a wide operating range. This upgrade is particularly beneficial for riders who modify their engines with performance cams, exhaust systems, or fueling upgrades, as it helps compensate for increased airflow demands by maintaining a stable vacuum seal, reducing the risk of throttle lag or hesitation. Installation is straightforward, requiring only basic tools, and the membrane s universal fitment ensures compatibility with aftermarket throttle slides like those from **MN, KTN, or other reputable brands**, making it an ideal choice for custom builds. Whether you re chasing a more linear powerband, improving drivability, or simply extending the lifespan of your throttle system, the **MN/KTN7 Throttle Slide Vacuum Membrane** delivers a subtle yet impactful upgrade that enhances both the mechanical integrity and the driving experience of your FXDC.

**Pros and Cons of buying a HardDrive MN/KTN7 Throttle Slide Vacuum Membrane for a 2005-2006 Harley-Davidson FXDC (Twelve) Engine**

### **Pros**

1. **Improved Throttle Response** The KTN7 membrane is designed to provide a more linear and responsive throttle feel compared to the stock OEM membrane. This can enhance acceleration and overall rideability, especially in stop-and-go traffic or when cruising.

2. **Better Throttle Control** The vacuum slide mechanism helps reduce throttle lag, allowing for smoother transitions between idle and full throttle. This can be particularly noticeable in low-RPM situations, such as when merging or accelerating from a stop.

3. **Durability and Performance** HardDrive MN is a reputable aftermarket brand known for high-quality throttle components. The KTN7 membrane is made from durable materials that resist wear better than some OEM alternatives, potentially extending the life of the throttle slide assembly.

4. **Easier Installation** The kit is designed for straightforward installation, often requiring only basic tools. Many users report being able to complete the job in under an hour, especially if they have some mechanical experience.

5. **Compatibility** The KTN7 is specifically engineered for the FXDC s engine configuration, ensuring a proper fit without the need for modifications. It works well with the stock throttle body and carburetion setup.

6. **Positive User Feedback** Many Harley owners report noticeable improvements in throttle smoothness and responsiveness after installing this kit. Positive reviews often highlight reduced "hunting" (throttle flutter) and a more refined power delivery.

7. **Cost-Effective Upgrade** Compared to more extensive engine modifications, this is a relatively inexpensive way to enhance throttle performance without sacrificing reliability.

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### **Cons**

1. **Potential for Over-Sensitivity** Some riders may find the throttle response too aggressive, especially if they prefer a more progressive or "mechanical" feel. The vacuum slide can make the throttle feel overly sensitive in certain conditions, which might not suit all riding styles.

2. **Minimal Power Gain** While throttle response improves, this modification does not significantly increase horsepower or torque. Expectations should remain realistic this is a refinement, not a performance upgrade.

3. **Maintenance Considerations** The vacuum slide mechanism requires occasional maintenance, such as checking for vacuum leaks or ensuring the membrane isn t cracked or degraded over time. Neglecting this could lead to erratic throttle behavior.

4. **Compatibility with Aftermarket Carburetion** If you ve modified your carburetion (e.g., with aftermarket carburetors or performance kits), the KTN7 may not integrate as seamlessly. Some riders report needing to adjust carburetor settings to compensate for the altered throttle dynamics.

5. **Learning Curve for New Riders** The smoother throttle response might take some adjustment for riders accustomed to a more "mechanical" or "jerky" throttle feel. It can feel less "connected" to the engine in some cases.

6. **Quality Variability** While HardDrive MN is generally reliable, counterfeit or low-quality replicas of this kit exist. Always purchase from authorized dealers or trusted sellers to avoid subpar performance or fitment issues.

7. **Not a Cure for Underlying Issues** If your throttle slide or carburetion has other problems (e.g., vacuum leaks, dirty slides, or failing carburetors), this kit alone won t resolve them. A thorough inspection of the entire throttle and carburetion system is recommended before installation.

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### **Conclusion**

The HardDrive MN/KTN7 Throttle Slide Vacuum Membrane is a worthwhile upgrade for the 2005-2006 FXDC if your primary goal is to improve throttle smoothness, reduce lag, and enhance rideability. It s a simple, cost-effective modification that delivers tangible benefits without major downsides for most riders. However, it s not a "magic fix" for power or a replacement for neglected carburetion or vacuum systems.

The biggest trade-off is the potential for an overly sensitive throttle, which may not suit riders who prefer a more traditional feel. If you value precise throttle control and smoother acceleration, this kit is highly recommended. If you re unsure, test-riding a bike with similar modifications or consulting with experienced FXDC owners can help determine if it aligns with your preferences.

### **Recommendation**

**Install the HardDrive MN/KTN7 Throttle Slide Vacuum Membrane if:**

- You want a noticeable improvement in throttle response and smoothness.

- You ride in stop-and-go traffic or appreciate linear throttle control.

- You re willing to perform basic maintenance to ensure long-term reliability.

- You ve already addressed any vacuum leaks, carburetor issues, or throttle slide wear.

**Avoid or reconsider if:**

- You prefer a more "mechanical" or progressive throttle feel.

- You ve made extensive carburetion modifications that may conflict with the kit.

- You re on a tight budget and can t afford potential future maintenance.

- You re unsure about your riding style s compatibility with the smoother response.

For most FXDC owners seeking a refinement rather than a power upgrade, this is a solid choice. Pair it with proper carburetor maintenance and vacuum system checks to maximize its effectiveness.

Details:

HardDrive Throttle Slide Vacuum Membrane for 2005 - 2006 Harley Davidson FXDCI tw: Status: In Stock.

part #: mnktn7 price

  • $26.65

specifications intakefuelmotorcycle:

  • for makes: Harley, Davidson
  • for years: 2005-2006
  • brand: Harddrive
  • mpn: Mn/ktn7
  • compatible year: 2006 2005
  • compatible make: Harley Davidson
  • compatible model: Fxdci Super Glide Custom
  • bundle description: 1 Pc Genuine Harddrive Throttle Slide Vacuum Membrane
  • type: Throttle Slide Vacuum Membrane
  • core charge: Free No Core Charge
  • fitment type: Direct Replacement

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  • started: May 28, 2026
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  • Motorcycle Scooter Parts Accessories > Air Intake Fuel Delivery > Other Air Intake Fuel Delivery

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for makes: harley, davidson, for years: 2005-2006, compatible year: 2006 2005, compatible make: harley davidson, compatible model: fxdci super glide custom, bundle description: 1 pc genuine harddrive throttle slide vacuum membrane, type: throttle slide vacuum membrane, core charge: free no core charge, fitment type: direct replacement,
category: motorcycle parts > motorcycle scooter parts accessories > air intake fuel delivery, sku: 24101944129573813,
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