KEIHIN 16100-165-004 Pa Carburetor Z50 53A

( Brand: Keihin ), ( Manufacturer Part Number: 16100-165-004 ), ( Engine Type: 4-stroke ), ( Type: Carburetor ), ( Country Of Origin: Japan )

Review KEIHIN Honda Z50 Pa 53a Carburetor Oem Part fits XR50

The **Keihin 16100-165-004** is a meticulously engineered carburetor designed specifically for Honda s legendary **Z50 and XR50** dirt bikes, offering a perfect blend of performance, reliability, and precision tuning for these iconic off-road machines. This **PA 53A** carburetor is a direct replacement for the stock unit, ensuring seamless integration with the engine s original setup while delivering enhanced throttle response, smoother power delivery, and improved fuel efficiency. Crafted from high-quality materials, the Keihin features a robust **aluminum body** with precision-machined internals, including a **floating needle jet system** that allows for fine-tuning of fuel mixture through adjustable needle positions. The **16mm bore** provides optimal airflow, balancing power output with throttle control, making it ideal for both aggressive trail riding and light trail work. The **PA (Piston Actuated) design** ensures consistent fuel delivery under varying engine loads, reducing the risk of stalling or hesitation, particularly in demanding conditions like steep climbs or rough terrain. This carburetor also incorporates a **durable gasket set** and **O-ring seals** to prevent leaks, ensuring a tight, secure fit when installed. Whether you're restoring a classic Z50/XR50 or upgrading an existing bike for better performance, the Keihin 16100-165-004 delivers a reliable, high-performance solution that respects the original engine s heritage while pushing it to new limits. Its compatibility with aftermarket accessories, such as performance air filters and exhaust systems, further expands its versatility, making it a standout choice for enthusiasts seeking both authenticity and modern efficiency.

**Pros and Cons of buying a Keihin 16100-165-004 (Honda Z50/XR50 PA 53A Carburetor)**

### **Pros**

1. **Direct Fitment** This carburetor is specifically designed for Honda Z50 and XR50 models with the PA 53A carburetor number, ensuring compatibility without modifications.

2. **Reliable Brand** Keihin is a well-known manufacturer of high-quality carburetors, known for durability and performance in small engines.

3. **Improved Performance** If the original carburetor is worn or clogged, replacing it with a new Keihin unit can restore proper fuel mixture, leading to better throttle response and power.

4. **Easier Maintenance** A new carburetor reduces the risk of fuel starvation, fouling, or inconsistent running, making the engine more reliable.

5. **Cost-Effective Replacement** Compared to rebuilding an old carburetor, purchasing a new one is often more economical in the long run.

6. **Better Fuel Efficiency** A properly functioning carburetor ensures optimal fuel-air ratio, which can improve mileage.

7. **Prevents Engine Damage** A failing carburetor can lead to rich or lean conditions, potentially damaging the engine. Replacing it prevents such issues.

### **Cons**

1. **Cost** While not extremely expensive, a new Keihin carburetor may still be a significant investment for a small engine like the Z50/XR50, especially if the bike is older or low-value.

2. **Installation Complexity** If the owner lacks mechanical experience, installing the carburetor may require careful adjustment of the float level, pilot jet, and throttle linkage, which could be challenging.

3. **Potential for Counterfeit Parts** There is a risk of purchasing a fake or low-quality carburetor, especially if buying from untrusted sellers. Always verify the seller s reputation.

4. **Additional Adjustments May Be Needed** After installation, fine-tuning (such as idle speed, mixture screws, or choke operation) may be required for optimal performance.

5. **Waste if Engine is Beyond Repair** If the rest of the engine (piston, cylinder, or ignition system) is worn out, replacing just the carburetor may not be enough to restore the bike s functionality.

### **Conclusion**

The Keihin 16100-165-004 carburetor is a solid choice for restoring or maintaining a Honda Z50/XR50 with a PA 53A carburetor. It offers improved performance, reliability, and fuel efficiency while being a direct replacement. However, the decision to purchase it depends on the bike s overall condition and the owner s mechanical skill level.

### **Recommendation**

- **Buy it if:** The engine runs poorly, the carburetor is visibly dirty or leaking, or you plan to restore the bike to full functionality. Ensure you purchase from a reputable seller to avoid counterfeit parts.

- **Consider alternatives if:** The bike is not worth significant investment, or if you lack confidence in installing and adjusting the carburetor properly. In such cases, rebuilding the original carburetor or consulting a mechanic may be better options.

- **Pair with maintenance:** After installation, perform a full tune-up, including checking the ignition system, air filter, and fuel lines, to ensure the best possible performance.

For most cases where the carburetor is the primary issue, the Keihin replacement is a worthwhile upgrade. However, weigh the cost against the bike s overall value and your ability to complete the job correctly.

Details:

Part Removed From: Honda XR50. This has been reassembled after the pictures were taken. Condition: These are used parts.: Keihin carburetor #PA 53A.

I opened this up to show the condition of inside. The throttle cable is not good. There is some corrosion and pitting on the inside.

part #: 16100165004 price

• $74.99

specifications carbthrotatv:

• for models: Xr50
• for makes: Honda
• brand: Keihin
• mpn: 16100-165-004
• engine type: 4-stroke
• type: Carburetor
• country of origin: Japan

seller carbthrotatv:

• city: Brush Prairie, Washington
• rating: 100.0%
• # reviews: 7583

general carbthrotatv:

• ATV, Side-by-Side UTV Parts Accessories > Air Intake Fuel Delivery > Carburetors
• condition: Used

payments carbthrotatv:

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

returns carbthrotatv:

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

offer carbthrotatv:

• best offers: True
• sold: 0
• options: Ship-to-home
• availability: In Stock
• quantity: 1
• started: April 29, 2026

shipping carbthrotatv:

• service: USPS Ground Advantage
• transit: 3-7 Days
• type: Calculated
• carrier: USPS
• class: Standard
• cost: $8.13

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