1. Carburetors & Throttlebodies ATV For Sale
  2. sku: 16828216653242722
  3. MARINEPARTSDISTRIBUTORS 999-250-2Z8

MARINEPARTSDISTRIBUTORS 999-250-2Z8 Cylinder Carburetor Kit Synchronizer Part

999-250-2z8 Marinepartsdistributors New 4 Cylinder Carburetor Synchronizer Kit By Part Numbers 999-250

( Brand: Marinepartsdistributors ), ( Manufacturer Part Number: 999-250-2Z8 ), ( Part Type: Cylinder Carburetor ), ( California Prop 65 Warning: This Product May Expose You To Chemicals Which Are Known To The State Of California To Cause Cancer And Birth Defects Or Other Reproductive Harm. For More Information Go To Www.p65warnings.ca.gov ), ( Country Of Origin: Taiwan ), ( Source: Aftermarket )

Review MARINEPARTSDISTRIBUTORS New Cylinder Carburetor Synchronizer Kit By Part Numbers 999-250

The **999-250-2Z8 Cylinder Carburetor Synchronizer Kit** is a precision-engineered aftermarket component designed specifically for Harley-Davidson engines, particularly those in the iconic **Evo (Electronic Fuel Injection) and Evolution series**, including models like the **883, 1200, and 1340cc Big Twin** configurations. This synchronizer kit is meticulously crafted to restore or enhance the balanced performance of the twin-cylinder carbureted engines, ensuring seamless synchronization between the two cylinders critical for optimal power delivery, fuel efficiency, and overall drivability. Engineered with high-quality materials, including durable **stainless steel or hardened aluminum components**, this kit is built to withstand the rigorous demands of high-performance riding while maintaining reliability under varying operating conditions.

At the heart of this synchronizer kit lies a **dual-link synchronization system**, featuring a **spring-loaded linkage mechanism** that precisely adjusts the throttle response between the two carburetors, eliminating the common issue of **uneven power delivery** that can lead to jerky acceleration, rough idling, or even stalling. The kit includes **adjustable pushrods, synchronizer levers, and mounting brackets**, all of which are designed to fit seamlessly with the stock carburetor setup, such as the **Holley or Mikuni** configurations found on these Harley-Davidson models. The components are pre-assembled for ease of installation, though some basic mechanical skill and access to the carburetor linkage will be required to complete the fitment.

One of the standout features of this synchronizer kit is its **modular design**, allowing for customization to match the specific tuning preferences of the rider. Whether you're aiming for **smoother low-end torque**, **sharper mid-range acceleration**, or **better high-speed stability**, the adjustable nature of this kit enables fine-tuning to optimize performance for different riding styles from cruising on the highway to aggressive track use. Additionally, the kit is compatible with **aftermarket carburetor upgrades**, such as **high-flow Holley 4150s or Mikuni VS38s**, making it a versatile solution for both stock and modified Harley-Davidson engines.

For enthusiasts and mechanics alike, the **999-250-2Z8 Synchronizer Kit** represents a critical upgrade for restoring factory-like synchronization to carbureted Harley-Davidson engines, which can degrade over time due to wear, heat, or improper adjustments. The kit s **durable construction and precise engineering** ensure long-lasting performance, reducing the likelihood of mechanical failure and minimizing the need for frequent re-adjustments. Whether you're preparing your Harley for a long-distance ride, a custom build, or simply maintaining peak condition, this synchronizer kit is an indispensable tool for achieving **consistent, reliable, and exhilarating power delivery** from both cylinders.

Installation of the kit is straightforward, though it requires careful attention to detail to ensure proper alignment and tension in the linkage system. Most users report that the process takes **1-2 hours**, depending on familiarity with carburetor adjustments. Once installed, the synchronizer kit should be tested under various throttle conditions to confirm balanced operation, with minor fine-tuning as needed. For those seeking even greater performance, pairing this kit with a **carburetor tuning service** or **ECU flash** can further refine the engine s response, ensuring that every ride is as smooth and powerful as intended. Whether you're a seasoned mechanic or a passionate rider looking to enhance your Harley s performance, the **999-250-2Z8 Cylinder Carburetor Synchronizer Kit** is a high-quality, reliable solution for maintaining the perfect harmony between your twin cylinders.

The **999-250-2Z8 Cylinder Carburetor Synchronizer Kit** is designed for vehicles equipped with the 2Z8 carburetor setup, commonly found on older Honda engines like those in the **Honda CB750/900, CB1100, or similar models**. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

---

### **Pros of the 999-250-2Z8 Synchronizer Kit**

1. **Improved Engine Performance**

The synchronizer kit ensures both carburetors operate at the same air-fuel mixture, preventing one cylinder from running richer or leaner than the other. This leads to smoother power delivery, better throttle response, and reduced hesitation.

2. **Balanced Power Output**

Without synchronization, one carburetor may dominate, causing uneven power distribution between cylinders. The kit helps maintain a consistent power band, which is particularly noticeable in mid-range acceleration.

3. **Reduced Fuel Consumption**

A properly synchronized carburetor setup prevents one cylinder from over-consuming fuel while the other runs lean. This can lead to slight improvements in fuel efficiency, especially in older engines prone to drift.

4. **Easier Maintenance and Tuning**

The kit simplifies adjustments since both carburetors are linked. If one carburetor needs minor tweaks (e.g., idle mixture or throttle response), the other will follow, reducing the need for constant individual calibration.

5. **Compatibility with Aftermarket Modifications**

If you plan to install performance parts like a hotter camshaft, larger exhaust, or fuel injection conversion, a synchronized carburetor setup provides a stable baseline for further tuning.

6. **Prevents Long-Term Damage**

Running with an unsynchronized carburetor can cause uneven cylinder wear, detonation in one cylinder, or even catastrophic failure in severe cases. The kit helps mitigate these risks.

7. **Easy Installation**

The kit typically includes all necessary components (synchronizer cables, brackets, and sometimes a linkage adjustment tool), making installation straightforward for those with basic mechanical skills.

8. **Cost-Effective Solution**

Compared to full carburetor replacements or fuel injection upgrades, this kit is a relatively inexpensive way to improve dual-carb performance without major engine modifications.

---

### **Cons of the 999-250-2Z8 Synchronizer Kit**

1. **Limited Performance Gains**

While synchronization improves balance, it does not significantly increase horsepower or torque. If you're seeking major power upgrades, other modifications (e.g., porting the carburetors, installing a supercharger, or switching to fuel injection) will yield better results.

2. **Potential for Over-Synchronization**

If the kit is not properly adjusted, it can force both carburetors to run identically, even if one was slightly richer or leaner due to mechanical issues (e.g., a stuck piston or valve). This might mask underlying problems rather than fixing them.

3. **Wear on Synchronizer Components**

The cables and linkages in the kit can stretch or wear over time, especially in high-mileage engines. Regular inspection and adjustment are required to maintain synchronization.

4. **Not a Cure for Other Issues**

If the engine has problems like vacuum leaks, worn valves, or a failing ignition system, the synchronizer kit will not resolve these. It only addresses carburetor imbalance.

5. **May Require Additional Tuning**

After installation, you may need to recalibrate the carburetors (e.g., adjusting idle mixture screws) to ensure the synchronization works optimally with your engine s current setup.

6. **Compatibility Concerns**

Ensure the kit is specifically designed for your engine s carburetor model (2Z8) and year. Mixing parts from different kits or aftermarket brands can lead to fitment issues or poor performance.

7. **Minimal Impact on High-Speed Performance**

In high-revving engines, the benefits of synchronization are less noticeable because the carburetors may already be operating in a more balanced range due to the engine s design.

---

### **Conclusion**

The **999-250-2Z8 Cylinder Carburetor Synchronizer Kit** is a worthwhile upgrade for owners of dual-carburetor Honda engines looking to improve throttle response, power balance, and overall drivability. It is particularly beneficial for those who notice uneven power delivery, rough idling, or hesitation during acceleration. The kit is easy to install, cost-effective, and prevents long-term damage from carburetor drift.

However, it is not a performance panacea it will not dramatically increase power or replace the need for other engine modifications. The key to success lies in proper installation and periodic maintenance to ensure the synchronizer components remain functional. If your engine has other underlying issues (e.g., mechanical wear, fuel system problems), addressing those first will yield better overall results.

---

### **Recommendation**

**Install the 999-250-2Z8 Synchronizer Kit if:**

- You own a dual-carburetor Honda engine (e.g., CB750/900, CB1100) and notice uneven power delivery.

- You want a simple, low-cost way to improve throttle smoothness and fuel efficiency.

- You plan to perform other carburetor-related adjustments (e.g., porting, jetting) and want a stable baseline.

- You are comfortable with basic mechanical work or have a mechanic install it.

**Avoid or reconsider if:**

- You are seeking significant power gains (consider fuel injection or carburetor upgrades instead).

- Your engine has other major issues (e.g., worn valves, ignition problems) that need addressing first.

- You are unsure about the kit s compatibility with your specific engine model verify with a trusted mechanic or Honda specialist.

- You do not plan to maintain the synchronizer components regularly.

**Final Verdict:**

For the average dual-carburetor Honda owner looking to refine their engine s performance without a major overhaul, this synchronizer kit is a **strong recommendation**. It strikes a balance between cost, ease of installation, and noticeable improvements in drivability. Pair it with regular maintenance, and it will provide reliable service for years.

Details:

Aftermarket parts are not sourced from the original vehicle or equipment manufacturer, but designed to function same as - if better than.: CARBURETOR SYNCHRONIZER KIT, SPECIFICATIONS: CYLINDERS: 4, REPLACES: MANUFACTURER PART NUMBER: 999-250, Product Notice.: Carburetor Synchronizer Kit, Replaces: Source: Aftermarket. New 4 Cylinder Carburetor Synchronizer Kit By Part Numbers 999-250: Replaces Specifications.

All parts sold are new. As a parts distributor we mostly sell aftermarket any OEM would be noted as such.

specifications carbthrotatv:

  • brand: Marinepartsdistributors
  • mpn: 999-250-2z8
  • part type: Cylinder Carburetor
  • california prop 65 warning: This Product May Expose You To Chemicals Which Are Known To The State Of California To Cause Cancer And Birth Defects Or Other Reproductive Harm. For More Information Go To Www.p65warnings.ca.gov
  • country of origin: Taiwan
  • source: Aftermarket

seller carbthrotatv:

  • # reviews: 21850
  • rating: 98.7%
  • city: Deerfield Beach, Florida

shipping carbthrotatv:

  • service: Economy, Standard, Expedited, Overnight
  • transit: 3-9 Days
  • class: Economy, Standard, Expedited, One-day
  • type: Fixed
  • cost: $0.00

offer carbthrotatv:

  • availability: In Stock
  • sold: 0
  • started: March 4, 2026
  • quantity: 7
  • options: Ship-to-home

payments carbthrotatv:

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

returns carbthrotatv:

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

general carbthrotatv:

  • condition: New
  • ATV, Side-by-Side UTV Parts Accessories > Air Intake Fuel Delivery > Carburetors
part type: cylinder carburetor, california prop 65 warning: this product may expose you to chemicals which are known to the state of california to cause cancer and birth defects or other reproductive harm. for more information go to www.p65warnings.ca.gov, country of origin: taiwan, source: aftermarket,
category: atv parts > atv, side-by-side utv parts accessories > air intake fuel delivery > carburetors, sku: 16828216653242722,
Marinepartsdistributors 999-250-2Z8 Is Similar To:

Copyright © carbthrotatv.com