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  3. PERFORMANCE MACHINE MN/9ZA4

PERFORMANCE MACHINE MN-9ZA4 Throttle Housing Iu MN/9ZA4

fits model: Flhtk. make: Harley, Davidson. year: 2010–2014.

9za4 Performance Machine Mn/9za4 Throttle Housing For 2010-2014 Harley Davidson Flhtk Iu

( Brand: Performance Machine ), ( Manufacturer Part Number: MN/9ZA4 ), ( Color: Black Anodized ), ( Compatible Year: 2014 2013 2012 2011 2010 ), ( Compatible Make: Harley Davidson ), ( Compatible Model: Flhtk Electra Glide Ultra Limited ), ( Bundle Description: 1 Pc Genuine Performance Machine Throttle Housing ), ( Type: Throttle Housing ), ( Core Charge: Free No Core Charge ), ( Fitment Type: Direct Replacement )

Review PERFORMANCE MACHINE Mn/9za4 Throttle Housing Harley Davidson Iu fits FLHTK 2010–2014

The **Performance MN/9ZA4 Throttle Housing** is a meticulously engineered, high-performance upgrade designed specifically for the **2010 2014 Harley-Davidson FLHTK IU (Road King)** and its **90 V-Twin engine**, delivering a seamless blend of precision, reliability, and enhanced throttle response. Crafted from premium **high-grade aluminum alloy**, this aftermarket throttle housing is built to exacting standards, ensuring a perfect fit with the stock throttle linkage while significantly improving throttle modulation, reducing lag, and providing a more linear, responsive feel. Unlike stock housings that often suffer from stiffness or inconsistent action, the **MN/9ZA4** features a **smooth, progressive action mechanism** with **precision-machined internal components**, allowing for effortless yet precise throttle control ideal for both cruising and aggressive riding styles. The housing is engineered to minimize internal friction, reducing wear on the throttle cable and linkage over time, which translates to longer-lasting performance and fewer maintenance headaches. Additionally, the **durable anodized finish** not only enhances corrosion resistance but also adds a subtle, sporty aesthetic that complements the aggressive styling of the Road King. Whether you're a weekend warrior seeking smoother acceleration or a serious rider looking to fine-tune your bike s performance, this throttle housing is a **direct bolt-on solution** that requires no modifications to the stock wiring or linkage, making installation straightforward and hassle-free. Backed by **Performance Motorworks reputation for quality and durability**, this component is a must-have for anyone serious about optimizing their FLHTK s throttle response without compromising on reliability or ease of use.

### Pros and Cons of Buying a Performance MN/9ZA4 Throttle Housing for a 2010 2014 Harley-Davidson FLHTK IU

#### **Pros**

1. **Improved Throttle Response** The MN/9ZA4 throttle housing is designed to provide a more linear and progressive throttle feel, reducing the "dead spot" common in stock Harley throttle bodies. This can make the bike feel more responsive, especially in stop-and-go traffic or when cruising.

2. **Better Throttle Control** The revised design reduces throttle lag, allowing for smoother acceleration and more precise power delivery. This is particularly noticeable when transitioning from idle to mid-range RPMs.

3. **Enhanced Throttle Position Sensor (TPS) Performance** The updated housing includes an improved TPS, which can lead to better fuel delivery and smoother operation, especially when paired with a tune or aftermarket ECU.

4. **Compatibility with Aftermarket Tuning** Many performance tuners (such as PowerVision, Haltech, or custom tunes) are optimized for the MN/9ZA4 throttle housing. Installing it can make it easier to achieve better power gains and drivability with a tune.

5. **Potential for Increased Power** While the throttle housing itself does not add power, pairing it with a tune can optimize fuel delivery, leading to better throttle response and, in some cases, slight power improvements, especially in low-to-mid-range RPMs.

6. **Reduced Throttle Jerk** The stock throttle housing can sometimes cause abrupt power delivery, especially when revving or shifting. The MN/9ZA4 housing helps smooth out these transitions.

7. **Future-Proofing for Modifications** If you plan to add a supercharger, turbo, or other performance modifications, the MN/9ZA4 housing is a more modern and reliable option compared to the stock unit.

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#### **Cons**

1. **Cost** The throttle housing itself is not extremely expensive (typically $200 $400 depending on the source), but if you need a tune to fully benefit from it, the cost can add up significantly. A professional tune can range from $150 to $500 or more.

2. **Requires a Tune for Full Benefits** While the throttle housing alone improves feel, the real advantages (such as optimized fuel delivery and power gains) are only fully realized with a custom tune. Without a tune, you may not notice a significant difference in power or performance.

3. **Installation Complexity** Replacing the throttle housing requires removing the airbox, throttle body, and ECU, as well as routing new wiring for the updated TPS. While not overly difficult, it does require some mechanical skill or a visit to a shop.

4. **Potential for Compatibility Issues** If you have other aftermarket modifications (such as a different ECU or fuel system), there could be compatibility concerns that require additional adjustments or a tune.

5. **Mixed Reviews on Power Gains** Some riders report noticeable improvements in throttle response and drivability, while others do not see significant power gains unless paired with a tune. Expectations should be managed accordingly.

6. **Not a Standalone Power-Upgrade** Unlike a camshaft swap or exhaust system, the throttle housing does not directly increase horsepower or torque. Its primary benefit is improved throttle feel and drivability.

7. **Market Availability and Quality Variability** Some aftermarket throttle housings may be poorly made or incompatible with certain Harley models. It s important to source from a reputable supplier (such as Harley-Davidson Performance Parts, MN Racing, or trusted third-party sellers).

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### **Conclusion**

The MN/9ZA4 throttle housing is a worthwhile upgrade for riders who want a more refined and responsive throttle experience on their FLHTK IU. It excels in improving throttle feel, reducing lag, and setting the stage for better performance with a tune. However, it is not a power upgrade on its own and requires additional investment (such as a tune) to unlock its full potential.

If you are already planning to tune your bike or want smoother throttle operation, the MN/9ZA4 housing is a solid choice. If you are primarily looking for raw power or have a limited budget, other modifications (such as exhaust systems, camshafts, or fuel system upgrades) may offer better returns.

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### **Recommendation**

- **Install the MN/9ZA4 throttle housing** if you value throttle responsiveness, plan to tune your bike, or are adding other performance modifications.

- **Pair it with a professional tune** to maximize benefits, especially if you want noticeable power gains or improved drivability.

- **Avoid buying it alone** if you are not planning to tune, as the benefits will be minimal.

- **Source from a trusted supplier** to ensure quality and compatibility with your specific FLHTK IU model.

For most riders who want a more engaging and refined ride, the MN/9ZA4 throttle housing is a smart investment just be prepared for the additional cost of tuning to see the best results.

Details:

Performance Machine Throttle Housing for 2010 - 2014 Harley Davidson FLHTK iu: Status: In Stock.

part #: mn9za4 price

  • $147.07

specifications intakefuelmotorcycle:

  • for models: Flhtk
  • for makes: Harley, Davidson
  • for years: 2010-2014
  • brand: Performance Machine
  • mpn: Mn/9za4
  • color: Black Anodized
  • compatible year: 2014 2013 2012 2011 2010
  • compatible make: Harley Davidson
  • compatible model: Flhtk Electra Glide Ultra Limited
  • bundle description: 1 Pc Genuine Performance Machine Throttle Housing
  • type: Throttle Housing
  • core charge: Free No Core Charge
  • fitment type: Direct Replacement

seller intakefuelmotorcycle:

  • city: Multiple warehouses
  • rating: 99.2%
  • # reviews: 21557

shipping intakefuelmotorcycle:

  • cost: $0.00
  • transit: 4-6 Days
  • type: Fixed
  • class: Standard
  • service: Standard

general intakefuelmotorcycle:

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

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  • time: 30 Days
  • policy: Returns Accepted
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offer intakefuelmotorcycle:

  • started: April 24, 2026
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  • availability: In Stock
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  • quantity: 1

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for models: flhtk, for makes: harley, davidson, for years: 2010-2014, compatible year: 2014 2013 2012 2011 2010, compatible make: harley davidson, compatible model: flhtk electra glide ultra limited, bundle description: 1 pc genuine performance machine throttle housing, type: throttle housing, core charge: free no core charge, fitment type: direct replacement,
category: motorcycle parts > motorcycle scooter parts accessories > air intake fuel delivery, color: black anodized, sku: 23572220677577632,
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