YAMAHA 80L-12658-00-00 Fan Dampner 80L-12658-01-00 SY16

( Manufacturer Part Number: 80L-12658-00-00 ), ( Type: Rear Damper Rod )

Review YAMAHA Oem Fan Case Dampner fits PHAZER 1990

The **Yamaha 80L-12658-00-00 (1990 Phazer Fan Dampner)** and its variant, the **80L-12658-01-00 (SY16)**, are meticulously engineered components designed to enhance the performance and longevity of Yamaha s legendary **Phazer series** air-cooled engines, particularly those found in classic outboard motors, generators, and marine applications from the late 1980s and early 1990s. These fan dampners serve as critical elements in the engine s cooling system, ensuring optimal airflow while mitigating vibrations and mechanical stress that can compromise engine reliability over time. Crafted from high-quality materials, the dampner features a robust **aluminum housing** with precision-machined fins, engineered to maximize heat dissipation while maintaining structural integrity under demanding operating conditions. The **80L-12658-00-00** is the standard model, while the **80L-12658-01-00 (SY16)** variant may incorporate subtle refinements, such as an updated fan blade design or slight modifications to the mounting interface, tailored for specific engine configurations or performance requirements. Both components are designed to interface seamlessly with the engine s fan assembly, utilizing a **clutch-style coupling** that allows the fan to spin independently of the crankshaft, reducing wear on the engine s internal components while efficiently circulating air through the radiator and cooling passages. Over time, exposure to saltwater, corrosion, and mechanical strain can degrade these dampners, leading to rattling noises, reduced cooling efficiency, or even catastrophic failure. By replacing a worn or damaged dampner with an authentic Yamaha part, owners of vintage Phazer engines can restore peak performance, extend the life of their outboard or generator, and ensure smooth operation in both freshwater and marine environments. Whether restoring a classic Yamaha 40HP or maintaining a reliable backup generator, these dampners exemplify Yamaha s commitment to durability and precision engineering, delivering a balance of strength and functionality that remains unmatched in the realm of air-cooled power systems.

### Yamaha Phazer Fan Dampner (80L-12658-00-00 and 80L-12658-01-00/SY16) Pros and Cons

#### **Overview**

The Yamaha Phazer series, particularly the **80L-12658-00-00 (original fan dampner)** and its replacement parts (**80L-12658-01-00/SY16**), are components of the **Phazer s cooling system**, specifically the **fan dampner assembly**. This part helps regulate airflow and cooling efficiency in the engine s exhaust system. Below is a detailed breakdown of the advantages and disadvantages of purchasing these parts, along with a conclusion and recommendation.

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### **Pros of buying a Yamaha Phazer Fan Dampner (80L-12658-00-00 / 80L-12658-01-00/SY16)**

1. **Improved Cooling Efficiency**

- The fan dampner helps control exhaust gas velocity, reducing backpressure and allowing the engine to breathe better. This can lead to **better throttle response and reduced overheating**, especially in high-performance or modified setups.

- A properly functioning dampner ensures that the **exhaust system operates at optimal efficiency**, preventing excessive heat buildup in critical engine components.

2. **Compatibility with Stock and Modified Engines**

- These parts are **direct replacements** for the original Yamaha Phazer dampner, meaning they fit seamlessly without requiring extensive modifications.

- They are also **compatible with aftermarket exhaust systems** that maintain the same mounting points, making them a versatile choice for upgrades.

3. **Durability and Longevity**

- The **80L-12658-01-00/SY16** is a **replacement part** designed to match the quality of the original, though some users report that aftermarket alternatives may offer better heat resistance.

- The **stamped metal construction** (common in OEM parts) is sturdy and can last for years if not damaged by excessive heat or corrosion.

4. **Easy Installation**

- Replacing the dampner is a **relatively straightforward process**, typically requiring only basic tools (socket wrench, gasket scraper, and possibly a torque wrench).

- Most mechanics and DIY enthusiasts can complete the job in **under an hour**, especially if the exhaust system is already partially disassembled.

5. **Cost-Effective Solution**

- Compared to **full exhaust system replacements**, the dampner is a **low-cost component** that can significantly improve performance.

- Purchasing from **authorized Yamaha dealers or reputable aftermarket suppliers** ensures you get a **genuine or high-quality aftermarket part** without breaking the bank.

6. **Reduced Engine Stress**

- By regulating exhaust flow, the dampner helps **reduce engine strain**, particularly in **high-RPM or aggressive riding conditions**.

- This can lead to **longer engine life** by preventing overheating and excessive wear on turbochargers (if applicable).

7. **Noise Reduction (Compared to Clogged or Damaged Dampners)**

- A **worn-out or corroded dampner** can cause **unusual exhaust noises** (e.g., rattling, hissing). Replacing it with a **new or restored part** often **eliminates these issues**, resulting in a smoother exhaust note.

---

### **Cons of buying a Yamaha Phazer Fan Dampner (80L-12658-00-00 / 80L-12658-01-00/SY16)**

1. **Potential for Counterfeit or Low-Quality Parts**

- Some **third-party sellers** (especially on eBay or Amazon) may offer **fake or substandard replicas** that fail prematurely.

- **Aftermarket alternatives** (e.g., from brands like **Akrapovic, Speedtech, or K&N**) may not always match the **exact dimensions** of the OEM part, leading to **poor sealing or airflow issues**.

2. **Corrosion and Wear Over Time**

- The **original 80L-12658-00-00** (and even replacements) can **corrode** if exposed to **saltwater, mud, or excessive moisture**, especially in off-road or coastal environments.

- **Rust or warping** can degrade performance, leading to **leaks or improper airflow regulation**.

3. **Limited Performance Gains for Stock Riders**

- If the bike is **not modified** and runs on **stock exhaust**, the dampner replacement may **not provide noticeable performance improvements** beyond **restoring original functionality**.

- **Serious riders or racers** may still benefit, but **casual riders** might not see a significant difference.

4. **Risk of Improper Installation**

- If not installed correctly (e.g., **loose bolts, missing gaskets, or incorrect torque**), the dampner can **leak exhaust gases**, leading to **reduced efficiency and potential engine damage** from backpressure.

- **Over-tightening** can also **warp the metal**, causing leaks or binding.

5. **Availability and Lead Times**

- **OEM parts (80L-12658-01-00/SY16)** may have **longer lead times** from Yamaha dealers, especially if ordering from international suppliers.

- **Aftermarket parts** may be harder to find in some regions, requiring **specialized suppliers**.

6. **Potential for Exhaust System Mismatches**

- If upgrading to a **different exhaust system** (e.g., **Akrapovic, Speed Triple, or custom builds**), the **original dampner may not fit**, requiring a **custom or aftermarket alternative**.

- Some **high-flow exhausts** may **bypass the dampner s function**, making the part **less effective** in regulating airflow.

7. **Cost of Additional Components**

- Replacing the dampner may require **new gaskets, bolts, or even a full exhaust manifold gasket set**, adding to the **total cost of the repair**.

- If the **exhaust pipe or muffler is damaged**, these may need replacement as well, increasing expenses.

---

### **Conclusion**

The **Yamaha Phazer Fan Dampner (80L-12658-00-00 / 80L-12658-01-00/SY16)** is a **practical and cost-effective solution** for restoring or improving the **cooling efficiency and performance** of a Yamaha Phazer s exhaust system. Its **direct replacement nature, ease of installation, and compatibility** with both stock and modified setups make it a **wise choice** for riders looking to **prevent overheating, reduce engine stress, and eliminate exhaust noises**.

However, **potential issues such as counterfeit parts, corrosion risks, and installation errors** must be carefully considered. **Buying from reputable suppliers, ensuring proper installation, and maintaining the exhaust system** will maximize the dampner s lifespan and effectiveness.

For **serious riders or those modifying their Phazer**, pairing this part with a **high-quality exhaust system or aftermarket dampner** (if available) could yield **better long-term performance**. Meanwhile, **stock riders** may only see **restored functionality** rather than significant power gains.

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### **Final Recommendation**

1. **If the dampner is damaged, corroded, or leaking**, replacing it with the **OEM 80L-12658-01-00/SY16** or a **high-quality aftermarket alternative** is **highly recommended** to prevent engine damage and improve cooling.

2. **Purchase from authorized Yamaha dealers or trusted aftermarket suppliers** (e.g., **Yamaha Parts Direct, Speedtech, or local Yamaha specialists**) to avoid counterfeit parts.

3. **Inspect the exhaust system for corrosion or wear** before installation replace **gaskets, bolts, or damaged sections** to ensure a **proper seal**.

4. **Follow torque specifications** (typically **25-30 Nm for exhaust bolts**) to prevent **over-tightening or stripping**.

5. **Consider an aftermarket dampner** (if available) if you plan **exhaust modifications**, as some high-performance systems may require **custom airflow solutions**.

6. **Monitor performance after installation** if **noise, backpressure, or overheating persists**, further diagnostics may be needed.

**Verdict:** **Worth the investment** for most Phazer owners, especially those experiencing **cooling or exhaust issues**. For **maximum performance**, combine this repair with **other exhaust system upgrades** if desired.

Details:

Change your mind, don't need the part, or just wan't what you are looking for. Removed From: 1990 Yamaha Phazer II with miles. 1990 Yamaha Phazer Ii Oem Fan Case Dampner 80L-12658-01-00 SY16.: This fan case dampner is in very good condition and shows normal signs of wear.

part #: 80l126580000 prices

• $12.99-$60.19

specifications snowmobileshocksoi:

• for models: Phazer
• for makes: Yamaha
• for years: 1990
• mpn: 80l-12658-00-00
• type: Rear Damper Rod

offer snowmobileshocksoi:

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

returns snowmobileshocksoi:

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

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• other
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shipping snowmobileshocksoi:

• type: Fixed
• cost: $0.00
• carrier: USPS
• transit: 3-9 Days
• service: USPS Priority Mail
• class: Expedited

general snowmobileshocksoi:

• Parts Accessories > Snowmobile Parts > Shocks Suspension
• condition: Used

seller snowmobileshocksoi:

• city: Eau Claire, Wisconsin
• # reviews: 35482
• rating: 99.6%

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