ATRACYPART AP-A1559 Carburetor 755382799706

( Brand: Atracypart ), ( Manufacturer Part Number: AP-A1559 ), ( Machine Type: Atv ), ( Items Included: Carburetor ), ( Vintage Part: No ), ( Smooth Engine Operation: Yes ), ( Fitment: 1987-1990 1992-1995 Yamaha Moto-4 350 Yfm350 ), ( Features: High Performance, Durable Construction, Stable Idle Speed Control ), ( Country Of Origin: China ), ( UPC: 755382799706 )

Review ATRACYPART Carburetor Yamaha And fits WARRIOR YFM350 MOTO-4 350 1987–2004

The **Atracypart AP-A1559 Carburetor** is a meticulously crafted, high-performance replacement for the stock carburetor found on Yamaha s iconic **Moto-4 350cc** and **YFM350** models spanning the years **1987 1990, 1992 1995**, as well as the **Warrior 350** from **1987 2004**. Engineered to restore and enhance the throttle response, fuel efficiency, and overall power delivery of these reliable yet aging engines, this carburetor is a precision-built alternative designed to meet or exceed OEM specifications while incorporating modern refinements for improved reliability and performance. The AP-A1559 features a **durable brass body** with a **chrome-plated bore**, ensuring resistance to corrosion and wear over extended use, while its **precision-machined components** including the **fuel inlet needle, pilot jet, and throttle valve** are designed to maintain optimal airflow and fuel mixture ratios. This carburetor is compatible with Yamaha s **CV carburetor system**, making it an ideal upgrade for riders seeking to eliminate common issues like **hunting throttle, lean running, or inconsistent power delivery** that plague older models. Whether restoring a classic bike to its original glory or pushing a modified Warrior 350 to new limits, the AP-A1559 delivers a seamless fit, smooth operation, and the confidence of a well-engineered solution that balances ease of installation with long-term durability. Built with both enthusiasts and mechanics in mind, it includes **clear labeling for easy identification of jets and adjustments**, allowing for quick tuning and fine-tuning to match riding conditions, from cruising to aggressive acceleration. Trusted by riders who demand performance without compromise, this carburetor stands as a testament to Atracypart s commitment to quality, ensuring that your Yamaha s engine runs with the precision and power it was originally designed for.

### **Pros and Cons of buying a ATC APA-1559 Carburetor for Yamaha YFM350/Moto-4 350 (1987 2004)**

1. **Improved Performance** The APA-1559 is a high-quality aftermarket carburetor designed to enhance throttle response, power delivery, and overall engine efficiency compared to stock units. It features a larger bore and optimized airflow, which can make a noticeable difference in acceleration and top-end speed.

2. **Better Fuel Economy** Unlike some aftermarket carbs that lean out the mixture, the APA-1559 is tuned to provide a smoother, more efficient fuel-air ratio, potentially improving gas mileage in some cases, especially if the stock carb was running rich.

3. **Durability and Reliability** ATC (Atco) is a well-regarded brand in the performance carburetor market, known for durable construction and consistent performance. The APA-1559 is built to last longer than many OEM carbs, reducing the risk of frequent failures.

4. **Easier Tuning and Adjustability** The carburetor includes adjustable jets and a pilot jet, allowing for fine-tuning to match different fuel types, altitudes, or riding conditions. This flexibility is useful for riders who want to optimize performance without major engine modifications.

5. **Compatibility with Modifications** If you plan to add performance upgrades (e.g., headers, exhaust, or a performance air filter), the APA-1559 can better handle increased airflow compared to stock carbs, preventing choking or poor performance.

6. **Reduced Carbon Buildup** A well-tuned carburetor like the APA-1559 helps maintain a cleaner combustion process, reducing carbon deposits on pistons and valves a common issue in older Yamaha engines.

7. **Wider Availability of Parts** Since ATC is a popular brand, replacement parts (jets, gaskets, diaphragms) are easier to find compared to OEM carbs, which may become obsolete over time.

8. **Potential for Increased Reliability** If the stock carb was leaking fuel or running erratically, replacing it with an APA-1559 can eliminate those issues, leading to a more stable and predictable engine.

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1. **Cost** The APA-1559 is more expensive than an OEM replacement carburetor. While it offers better performance, the upfront cost may be a deterrent for budget-conscious riders. Prices typically range from **$150 $250**, depending on the seller and condition.

2. **Installation Complexity** Replacing a carburetor requires removing the carb, adjusting the throttle cable, setting the idle mixture, and ensuring proper vacuum and air-fuel ratios. If you re not mechanically inclined, this may require professional installation, adding to the cost.

3. **Learning Curve for Tuning** While adjustable, the APA-1559 requires some knowledge of carburetor tuning. Incorrect jet sizing or mixture adjustments can lead to poor performance, rough idling, or even engine damage if the fuel-air ratio is too lean.

4. **Potential for Overcomplication** If your bike is otherwise stock or lightly modified, the performance gains from the APA-1559 may not be dramatic enough to justify the cost. For casual riders, the difference may be subtle.

5. **Compatibility with Stock Components** Some riders report that the APA-1559 works best when paired with other performance upgrades (e.g., a performance exhaust or air filter). If your bike remains stock in other areas, the carb alone may not deliver significant benefits.

6. **Risk of Voiding Warranty (if applicable)** If your Yamaha is under warranty, installing an aftermarket carburetor may void coverage, especially if the failure is related to the engine s interaction with the carb.

7. **Fuel Quality Dependence** Like all carbs, the APA-1559 performs best with clean, high-quality fuel. If you frequently use low-grade or ethanol-blended gas, you may experience clogging or tuning issues more often.

8. **Not a "Set-and-Forget" Solution** Unlike some modern fuel-injected systems, carburetors require periodic maintenance (cleaning, jet checks, diaphragm replacement). Neglecting this can lead to performance degradation over time.

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### **Conclusion**

The **ATC APA-1559 carburetor** is a solid aftermarket upgrade for the Yamaha YFM350/Moto-4 350, offering noticeable improvements in power, throttle response, and reliability especially for riders who want to push their bikes beyond stock performance. It is particularly beneficial if your engine is showing signs of wear (e.g., sluggishness, poor acceleration, or fuel leaks) or if you re planning other modifications.

However, it is not a "magic fix" for all issues, and its benefits are most apparent when paired with other performance upgrades. The cost and installation effort may outweigh the gains for casual riders who don t plan further modifications. If you re willing to invest time in tuning and maintenance, the APA-1559 is a worthwhile upgrade. For those on a tight budget or with minimal modification plans, a well-maintained OEM carburetor might suffice.

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### **Recommendation**

- You notice your Yamaha s performance has degraded over time (e.g., slow acceleration, rough idle, fuel waste).

- You plan to add other performance parts (exhaust, headers, air filter) and want a carburetor that can handle increased airflow.

- You re comfortable with basic carburetor tuning and maintenance.

- You ride in conditions where a more responsive engine would improve safety or enjoyment (e.g., highway cruising, hill climbing).

- Your bike is in excellent condition and you only ride lightly (e.g., short commutes, casual cruising).

- You re unwilling to spend extra time tuning or maintaining the carburetor.

- You prefer a simpler, lower-cost solution and are satisfied with stock performance.

- Your budget is tight, and you d rather allocate funds to other upgrades (e.g., suspension, brakes).

**Final Verdict:** For enthusiasts who want a noticeable performance boost and are willing to invest in tuning, the **ATC APA-1559 is a strong choice**. For those who prioritize simplicity or have limited modification plans, it may not be the best use of funds. Always ensure proper installation and initial tuning by a professional if you re unsure.

Details:

Diameter: Intake Manifold side:36mm/1.41 inch inner diameter 40mm/1.57 inch outer diameter. Shipping is available to the lower 48 states only. 1992 1995 Yamaha MOTO-4 350 YFM350. 1987 1990 Yamaha MOTO-4 350 YFM350.

part #: apa1559 prices

• $57.64-$75.56

specifications carbthrotatv:

• for models: Yfm350, Moto-4, 350, Warrior
• for makes: Yamaha
• for years: 1987-2004
• brand: Atracypart
• mpn: Ap-a1559
• machine type: Atv
• items included: Carburetor
• vintage part: No
• smooth engine operation: Yes
• fitment: 1987-1990 1992-1995 Yamaha Moto-4 350 Yfm350
• features: High Performance, Durable Construction, Stable Idle Speed Control
• country of origin: China
• upc: 755382799706

general carbthrotatv:

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

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• rating: 99.7%
• city: Multiple Locations
• # reviews: 1699

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• time: 30 Days
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offer carbthrotatv:

• quantity: 1
• sold: 0
• started: May 4, 2026
• options: Ship-to-home
• best offers: True
• availability: In Stock

shipping carbthrotatv:

• transit: 15-24 Days
• cost: $0.00
• type: Fixed
• service: Economy, Standard
• class: Economy, Standard

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