YAMAHA 5X6-25388-00-00 Rear Chain Tensioners

( Manufacturer Part Number: 5X6-25388-00-00 ), ( Part Type: Chain )

Review YAMAHA Rear Chain Tensioners fits YZ 250 1982

The **Yamaha 5X6-25388-00-00 Rear Chain Tensioner** from the **1982 YZ250** is a meticulously engineered, high-performance component designed to ensure optimal chain tension and reliability in Yamaha s legendary two-stroke dirt bike. This precision-crafted tensioner is a critical part of the bike s drivetrain, playing a vital role in maintaining consistent power delivery, reducing chain wear, and preventing premature failure especially under the demanding conditions of motocross, enduro, or off-road racing. Built to Yamaha s exact specifications, the **5X6-25388-00-00** features a robust, durable construction with a **spring-loaded mechanism** that dynamically adjusts to accommodate chain stretch, suspension movement, and varying terrain, ensuring a taut, responsive drive chain at all times. The tensioner is designed to withstand the intense forces generated by the YZ250 s high-revving, two-stroke engine, which demands a tensioner that can handle both the mechanical stress of aggressive riding and the thermal fluctuations of prolonged use. Made from high-grade steel and treated with Yamaha s proprietary coatings for corrosion resistance, this component is built to last, even in the harshest off-road environments where dirt, moisture, and extreme temperatures can accelerate wear. Whether you're restoring a classic YZ250 to its original glory or upgrading an existing bike for improved performance, this OEM-quality tensioner guarantees a seamless fit and reliable operation, allowing riders to focus on the track rather than worrying about drivetrain issues. Its compatibility with the **1982 YZ250** model ensures a perfect match with the bike s stock chain and sprocket setup, making it an essential replacement part for anyone seeking to maintain or enhance the performance of this iconic dirt bike.

### **Pros and Cons of buying a Yamaha 5X6-25388-00-00 Rear Chain Tensioner (1982 YZ 250)**

1. **Direct Fitment** This part is specifically designed for the 1982 Yamaha YZ 250, ensuring compatibility without modification.

2. **Reliability** Yamaha parts are generally built to high standards, reducing the risk of premature failure compared to aftermarket alternatives.

3. **Authentic Performance** Using an OEM (Original Equipment Manufacturer) part maintains the intended tensioning characteristics of the bike s drivetrain.

4. **Ease of Installation** Since it s a direct replacement, installation should be straightforward for someone with basic mechanical skills.

5. **Durability** The tensioner is likely made from materials that match the bike s original build quality, potentially lasting as long as the rest of the drivetrain if properly maintained.

6. **Warranty Coverage** If purchased from a reputable dealer or seller, it may still carry some form of warranty or return policy.

7. **Prevents Chain Slippage** A functioning tensioner ensures proper chain tension, reducing wear on the sprocket, chain, and rear derailleur.

1. **Age and Wear** The part is from a 1982 model, meaning it may have been sitting in storage for decades. Rust, degradation, or damage could be present.

2. **Potential Counterfeit Risk** Older parts, especially from unknown sellers, may be fakes or reconditioned without proper inspection.

3. **Limited Availability** Finding an authentic, high-quality used or new OEM part may be difficult, depending on the seller s reputation.

4. **Cost vs. Aftermarket Alternatives** Depending on the seller, this part could be more expensive than a high-quality aftermarket tensioner that offers similar or better performance.

5. **No Modern Upgrades** Unlike newer aftermarket parts, this OEM tensioner won t include modern materials or design improvements that could enhance longevity or performance.

6. **Condition Uncertainty** If buying used, there s no guarantee the part hasn t been damaged or improperly stored, leading to premature failure.

7. **Maintenance Requirements** Even an OEM part will require periodic lubrication and inspection to prevent seizing or failure over time.

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### **Conclusion**

The **Yamaha 5X6-25388-00-00 rear chain tensioner** is a solid choice if you prioritize **direct fitment, reliability, and authenticity** for your 1982 YZ 250. However, its **age, potential condition issues, and limited availability** make it a riskier purchase compared to newer aftermarket alternatives. If you can find a **verified, high-quality used or new OEM part in good condition**, it is a worthwhile investment. If not, an **aftermarket tensioner** (such as those from **DID, Rotor, or PowerGrip**) may offer better value with similar performance.

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### **Recommendation**

- Proceed with confidence, as this is the most reliable option for exact fitment.

- Inspect the part thoroughly for rust, cracks, or wear before installation.

- Request detailed photos and a clear description of the part s condition.

- Consider an **aftermarket alternative** if the price is significantly lower and the seller s reputation is questionable.

- If the tensioner is beyond repair, consider **replacing the entire rear derailleur assembly** (if the tensioner is integrated) or upgrading to a **modern aftermarket tensioner** for better longevity.

- Ensure the **chain and sprocket** are in good condition before installing a new tensioner, as a worn chain can still cause premature tensioner failure.

**Final Verdict:** The OEM tensioner is the **best choice for authenticity and reliability**, but **aftermarket options may be more practical** if sourcing a genuine OEM part is difficult or expensive. Always prioritize **condition and seller reputation** over price.

Details:

This is a used part that has been cleaned, tested and inspected to ensure quality. Good usable part with only normal signs of wear and use but nothing excessive. 82 Yamaha YZ 250. Combined shipping is available for multiple items.

part #: 5x6253880000 prices

• $15.95-$25.00

specifications cyclevintagee:

• for models: Yz, 250
• for makes: Yamaha
• for years: 1982
• mpn: 5x6-25388-00-00
• part type: Chain

seller cyclevintagee:

• # reviews: 111566
• city: Chippewa Lake, Ohio
• rating: 99.9%

general cyclevintagee:

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

payments cyclevintagee:

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

shipping cyclevintagee:

• class: Standard
• cost: $0.00
• carrier: USPS
• service: USPS First Class
• transit: 4-8 Days
• type: Fixed

offer cyclevintagee:

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

returns cyclevintagee:

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

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