YAMAHA 17D-25389-00-00 Swingarm Chain Tensioner Adjustment Block

( Manufacturer Part Number: 17D-25389-00-00 ), ( Type: Swingarm Chain Tensioner )

Review YAMAHA Swingarm Chain Tensioner Adjustment Block fits YZ250F YZ450F

The **Yamaha 17D-25389-00-00 Swingarm Chain Tensioner Adjustment Block** is a precision-engineered component designed exclusively for the **YZ250F and YZ450F** sport bikes, ensuring optimal chain tension and performance under demanding riding conditions. Crafted from high-grade die-cast zinc alloy, this tensioner block is built to withstand the rigors of high-speed racing, aggressive cornering, and prolonged off-road use, where chain slippage or excessive wear could compromise handling and safety. The component features a robust, reinforced design with a smooth, polished surface to minimize friction and wear on the chain and sprocket, thereby extending the lifespan of the drivetrain components. Its compact yet durable construction allows for seamless integration into Yamaha s proven swingarm assembly, maintaining the bike s factory alignment and tensioning characteristics. Whether you re a competitive motocross rider pushing the limits on the track or an enthusiast tackling rough terrain, this tensioner block ensures consistent chain tension, reducing the risk of derailment and enhancing overall drivetrain reliability. The part is a direct-fit replacement, compatible with the original OEM specifications, and is ideal for riders seeking to restore or upgrade their bike s performance without compromising on quality or fitment. Properly maintaining this component is essential for preserving the integrity of the chain and sprocket, making it a critical yet often overlooked part of routine bike upkeep.

### **Pros and Cons of buying a Yamaha 17D-25389-00-00 Swingarm Chain Tensioner Adjustment Block for YZ250F/YZ450F**

1. **Direct Compatibility** This part is specifically designed for the Yamaha YZ250F and YZ450F models, ensuring a perfect fit without modification.

2. **Improved Chain Tension Control** A well-functioning tensioner prevents chain slippage, reduces wear on the sprocket and chain, and extends the lifespan of the drivetrain.

3. **Durability** Made from high-quality materials, this part is built to withstand the stress of off-road use, reducing the need for frequent replacements.

4. **Easy Installation** Designed for straightforward replacement, requiring minimal tools and time to install, even for less experienced mechanics.

5. **Cost-Effective Maintenance** Replacing a worn-out tensioner is far cheaper than dealing with chain or sprocket damage caused by improper tension.

6. **Performance Benefits** Proper chain tension ensures smoother power delivery, reducing energy loss and improving overall bike performance.

7. **Prevents Premature Wear** A failing tensioner can cause excessive chain stretch, leading to accelerated wear on the rear wheel bearings, sprocket, and chain itself.

1. **Limited Use Beyond Target Models** This part is **only** for the YZ250F and YZ450F (2019 2023 models, depending on exact year). Attempting to use it on other bikes may result in improper fitment.

2. **Potential Learning Curve for DIY Installers** While installation is relatively simple, inexperienced riders may struggle with alignment or torque specifications, risking improper function.

3. **OEM Quality vs. Aftermarket Alternatives** Some riders prefer aftermarket tensioners that may offer additional features (e.g., adjustable tensioners) or better durability at a similar price.

4. **Availability Concerns** Depending on location, this part may not be readily available at all bike shops, requiring online ordering or special requests.

5. **Wear Over Time** Like all mechanical components, this tensioner will eventually wear out, requiring replacement though with proper maintenance, it should last several years.

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### **Conclusion**

The **Yamaha 17D-25389-00-00 swingarm chain tensioner adjustment block** is a **highly recommended OEM replacement part** for riders maintaining their YZ250F or YZ450F. Its direct compatibility, durability, and role in preventing costly drivetrain damage make it a **wise investment** for routine maintenance. However, it is **not a universal part** and should only be used on the specified models.

For riders who prioritize **long-term reliability and ease of installation**, this is the best choice. Those who prefer **adjustable or high-performance alternatives** may explore aftermarket options, but they should ensure full compatibility before purchasing.

If you need a **direct OEM replacement** for your YZ250F or YZ450F and want to maintain optimal chain tension and drivetrain health, **buy the Yamaha 17D-25389-00-00 tensioner block**. It is a **cost-effective, durable solution** that will save you from more expensive repairs down the line. Always follow proper installation procedures and torque specifications to ensure longevity.

Details:

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part #: 17d253890000 prices

• $21.99-$26.99

specifications fendeframat:

• for models: Yz250f, Yz450f
• for makes: Yamaha
• mpn: 17d-25389-00-00
• type: Swingarm Chain Tensioner

offer fendeframat:

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

returns fendeframat:

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

shipping fendeframat:

• service: USPS Ground Advantage
• type: Fixed
• class: Standard
• transit: 5-11 Days
• cost: $0.00
• carrier: USPS

payments fendeframat:

• credit card: Diners-club
• wallet: Paypal
• other

general fendeframat:

• Motorcycle Scooter Parts Accessories > Body Frame > Other Body Frame
• condition: New other see details

seller fendeframat:

• rating: 100.0%
• # reviews: 687
• city: Roanoke, Virginia

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