YAMAHA 90387-07562 Air Box Collar

( Manufacturer Part Number: 90387-07562 ), ( Part Type: Box ), ( Vintage Part: Yes ), ( Compatible Year: 1977 ), ( Country Of Origin: Japan )

Review YAMAHA Oem Air box Collar fits XS500 YZ250 YZ465 1976–1980

The **Yamaha 90387-07562 Air-Box Collar** is a meticulously engineered, high-performance replacement part designed specifically for classic Yamaha air-cooled two-stroke engines, including the iconic **XS500 (1976 1977 models)** as well as the **YZ250 and YZ465 (1980 models)**. Crafted from durable, heat-resistant materials, this collar serves as a critical component of the air filtration system, ensuring optimal airflow while maintaining a tight seal between the air filter housing and the cylinder head. Its precise fitment is essential for maintaining engine efficiency, reducing air leakage, and preventing contaminants from entering the combustion chamber, which is particularly vital for preserving the longevity and performance of these legendary engines. The collar s design incorporates a snug, rubberized gasket that resists wear and deformation over time, even under the high temperatures and vibrations inherent in high-revving two-stroke applications. Whether you're restoring a vintage XS500 for track use or reviving a YZ250 for off-road adventures, this OEM-quality part guarantees a seamless installation, restoring factory specifications and enhancing throttle response. Built to withstand the demands of both street and track applications, the **90387-07562** is a must-have for any enthusiast seeking to maintain or upgrade the air filtration integrity of their Yamaha classic.

### **Pros and Cons of buying a Yamaha Air-Box Collar (Part Numbers: 90387-07562 for 1976-1977 XS500, 1980 YZ250, YZ465)**

This air-box collar is a critical component for several classic Yamaha motorcycles and dirt bikes, ensuring proper air filtration and engine protection. Below is a detailed breakdown of its advantages and drawbacks, followed by a conclusion and recommendation.

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### **Pros**

1. **Compatibility with Classic Models**

- The part is designed specifically for the **1976-1977 XS500** (a classic cruiser), the **1980 YZ250**, and the **YZ465** (both early 2D and 2E model years). This means it will fit these bikes without modification, making it a straightforward upgrade or replacement.

- The **XS500** and **YZ models** are highly sought-after in the classic and off-road communities, so having an authentic OEM or high-quality aftermarket part is valuable for restoration or maintenance.

2. **Improved Airflow and Engine Protection**

- The air-box collar helps seal the air filter housing, preventing dirt, debris, and moisture from entering the engine. This is crucial for maintaining engine longevity, especially in dusty or off-road conditions.

- A well-sealed air box reduces the risk of **carbon buildup, oil contamination, and premature wear** on the piston and cylinder walls, which are common issues in older engines.

3. **Authentic Fit and Finish**

- If this is an **OEM (Original Equipment Manufacturer) part**, it will match the original design of the bike, ensuring a clean look and proper functionality. Aftermarket replicas can sometimes look or fit poorly, whereas an OEM part guarantees compatibility.

- For collectors or restorers, using genuine parts preserves the bike s historical accuracy and resale value.

4. **Easy Installation**

- The air-box collar is a relatively simple part to install, requiring only basic tools. Most riders or mechanics can replace it in **under an hour**, depending on their experience.

- No major disassembly of the engine or frame is needed, making it a low-effort maintenance task.

5. **Prevents Common Engine Issues**

- Many older Yamaha engines suffer from **oil dilution** (fuel mixing with oil) or **carbon fouling** due to poor air filtration. A properly sealed air box helps mitigate these problems, improving engine performance and reliability.

- For the **YZ250/YZ465**, which were popular in motocross, keeping the air box sealed is essential for maintaining peak power output in competitive riding.

6. **Cost-Effective Long-Term Solution**

- While the part itself may not be extremely expensive (typically ranging from **$20 to $50**, depending on whether it s OEM or aftermarket), replacing it early prevents costly engine repairs later.

- Compared to the potential damage from a failing air box (e.g., **$300 for a rebuilt engine**), this is a small investment in engine health.

7. **Aftermarket Availability and Durability**

- Even if the OEM part is discontinued, aftermarket versions (from brands like **Yamaha Performance Parts, Gasket Pro, or eBay sellers**) are widely available. Many of these are made from durable materials like **rubber or silicone**, which resist cracking and degradation over time.

- Some aftermarket versions include **self-sealing properties**, reducing the need for frequent adjustments.

---

### **Cons**

1. **Potential for Wear and Cracking**

- Over time, **rubber or silicone air-box collars can degrade** due to exposure to **UV rays, oil, and extreme temperatures**. This can lead to leaks, reducing the effectiveness of the air filter.

- If the bike is stored long-term or ridden in harsh conditions, the collar may need replacement **every 3-5 years**, depending on usage.

2. **Difficulty Finding OEM Parts**

- Yamaha has **discontinued production** of many older parts, including specific air-box collars for these models. While aftermarket options exist, they may not always match the **exact fit or durability** of an OEM part.

- Some sellers may offer **counterfeit or low-quality replicas**, which could fail prematurely or not seal properly.

3. **Installation Challenges on Older Bikes**

- If the bike has been **modified or heavily restored**, the air-box collar may not fit as intended due to **altered mounting points or misaligned components**.

- Rust or corrosion in the air box housing can make installation difficult, requiring **cleaning or minor repairs** before fitting the new collar.

4. **Cost of Replacement vs. Upgrading the Air Filter System**

- While replacing the collar is cheap, some riders opt for **upgraded air filter systems** (e.g., **K&N, Yoshimura, or high-flow paper filters**) that may require **removing the stock air box entirely**.

- If you re already investing in an air filter upgrade, the **air-box collar becomes less critical**, as modern filters often have their own sealing mechanisms.

5. **Risk of Improper Sealing**

- If the collar is **not installed correctly** (e.g., not tightened evenly or misaligned), it can **leak air**, reducing filtration efficiency.

- Some aftermarket collars may be **too loose or too tight**, leading to **premature wear** or **difficulty removing** the air filter.

6. **Limited Lifespan in Harsh Conditions**

- In **extreme dust, sand, or off-road environments**, the air-box collar may wear out faster due to **constant abrasion**.

- Riders who frequently ride in **deserts or rocky terrain** may need to replace it **more frequently** than average.

7. **Availability of Gaskets and Adjacent Parts**

- If the air-box collar is part of a **larger air filter assembly**, other components (e.g., **gaskets, screws, or mounting brackets**) may also need replacement.

- Some bikes (like the **XS500**) have **unique mounting configurations**, so ensuring all related parts are in good condition is important.

---

### **Conclusion**

The **Yamaha air-box collar (90387-07562)** is a **practical and necessary part** for maintaining the health of the **1976-1977 XS500, 1980 YZ250, and YZ465**. Its primary benefits **improved engine protection, easy installation, and compatibility with classic models** make it a **worthwhile investment** for riders who prioritize longevity and performance.

However, **potential drawbacks** such as **wear over time, difficulty sourcing OEM parts, and installation challenges** should be considered. If you re restoring a bike or preparing it for heavy use, **regular inspection and replacement** of the collar (every **3-5 years**) is recommended.

For riders who are **not planning major modifications**, this part is **essential maintenance**. If you re considering **air filter upgrades**, the collar s importance may diminish, but it remains a **critical component for stock setups**.

---

### **Final Recommendation**

- You own one of the **specified models (XS500, YZ250, YZ465)** and need a **replacement or upgrade** for your air filter system.

- You ride in **dusty or off-road conditions** where engine protection is crucial.

- You value **authentic OEM parts** for restoration or historical accuracy.

- You want a **low-cost, easy-to-install** solution to prevent **carbon buildup and oil contamination**.

- You re **upgrading your air filter** (e.g., to a high-flow K&N or Yoshimura filter), which may render the collar less necessary.

- You find **aftermarket collars with better durability** (e.g., silicone-based or self-sealing designs).

- You re **restoring a bike with significant modifications** that may affect the collar s fit.

- **Purchase from a reputable seller** (eBay, Yamaha Performance Parts, or trusted motorcycle parts dealers) to avoid counterfeit or low-quality replicas.

- **Inspect the air box housing** for rust or damage before installation.

- **Replace the collar every 3-5 years** (or sooner if it shows signs of cracking or leaks).

- **Combine with a high-quality air filter** (e.g., **Yamaha s own high-flow filter or a trusted aftermarket brand**) for optimal performance.

For most riders, this part is a **smart, cost-effective choice** that extends engine life and maintains peak performance. If you re unsure about installation, consult a **local Yamaha dealer or motorcycle mechanic** for guidance.

Details:

Yamaha OEM Air box COLLAR For 1980 YZ250G and YZ465G And 1976-1977 XS500 YAMAHA PART # 90387-07562 Comes with the rubber grommet But is damaged needs To be replaced. Just giving with The collar to make it clear no complaints.

part #: 9038707562 prices

• $14.99-$19.95

specifications cyclevintagee:

• for models: Xs500, Yz250, Yz465
• for makes: Yamaha
• for years: 1976-1980
• mpn: 90387-07562
• part type: Box
• vintage part: Yes
• compatible year: 1977
• country of origin: Japan

seller cyclevintagee:

• rating: 100.0%
• city: Phoenix, Arizona
• # reviews: 2308

shipping cyclevintagee:

• transit: 4-9 Days
• service: USPS Ground Advantage
• cost: $5.20
• carrier: USPS
• class: Standard
• type: Calculated

payments cyclevintagee:

• wallet: Google-pay
• other
• credit card: Visa

offer cyclevintagee:

• availability: In Stock
• started: March 9, 2026
• sold: 0
• quantity: 1
• options: Ship-to-home

general cyclevintagee:

• condition: Used
• Parts Accessories > Motorcycle Scooter Parts Accessories > Other Motorcycle Scooter Parts Accessories

returns cyclevintagee:

• policy: Returns Accepted
• paid by: Buyer
• time: 14 Days

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