YAMAHA B11-21425-00-00 Upper Engine Head Frame Mounting Bracket Bolts

( Manufacturer Part Number: B11-21425-00-00 ), ( Type: Frame ), ( Placement On Vehicle: Upper )

Review YAMAHA Upper Engine Head To Frame Mounting Bracket And Bolts fits 450F YZ 2016–2017

The **Yamaha B11-21425-00-00 Upper Engine Head Frame Mounting Bracket Bolt** is a precision-engineered OEM replacement part designed exclusively for the **2016 and 2017 Yamaha YZ450F**, ensuring a seamless fit and optimal performance for this high-performance dirt bike. Crafted from high-grade, heat-treated steel, these bolts are engineered to withstand the extreme stresses of off-road racing, providing unmatched durability and resistance to wear, fatigue, and corrosion. The bolt features a **fine-threaded design** that securely fastens the upper engine head to the frame, maintaining proper alignment and torque specifications critical for engine stability, power delivery, and overall handling. As a direct replacement for the original equipment manufacturer (OEM) component, this bolt adheres to Yamaha s strict engineering standards, guaranteeing compatibility with the bike s suspension, engine, and frame interface. Whether used for routine maintenance, upgrades, or aftermarket modifications, these bolts are essential for preserving the structural integrity of the YZ450F s powertrain while ensuring reliable performance under the most demanding riding conditions. Their precise fit and robust construction make them an indispensable part for riders and mechanics seeking to maintain the peak condition of their Yamaha YZ450F.

### **Pros and Cons of buying a Yamaha YZ450F Upper Engine Head Frame Mounting Bracket Bolts (Part # B11-21425-00-00, 2016-2017 Models)**

1. **OEM Quality and Fit** These are genuine Yamaha parts, ensuring a perfect fit with no modifications required. They are manufactured to the same specifications as the original components, reducing the risk of compatibility issues.

2. **Durability and Reliability** Yamaha uses high-quality materials in their parts, which means these bolts are designed to withstand the stress of high-performance riding without premature wear or failure.

3. **Warranty Coverage** Purchasing from an authorized dealer or Yamaha-approved seller often includes warranty protection, offering peace of mind against defects or early failure.

4. **Performance Integrity** Using original equipment parts helps maintain the bike s intended performance, suspension tuning, and handling characteristics. Aftermarket alternatives may not replicate the exact fit or function.

5. **Ease of Installation** Since these are stock parts, they are straightforward to install, requiring minimal effort and no additional adjustments beyond standard maintenance procedures.

6. **Resale Value Preservation** Keeping the bike stock with OEM parts can help maintain its resale value, as buyers often prefer fully original bikes.

7. **Access to Technical Support** Yamaha dealerships and service centers can provide guidance on installation and troubleshooting, which is less likely with aftermarket parts.

1. **Higher Cost** Genuine Yamaha parts are typically more expensive than aftermarket alternatives. This can be a significant drawback for riders on a tight budget.

2. **Limited Availability** Depending on the region, these parts may not be readily available at all Yamaha dealerships, requiring potential shipping delays or sourcing from third-party sellers.

3. **Potential Overkill for Minor Repairs** If the issue is isolated to a single bolt (e.g., a loose or stripped bolt), replacing the entire bracket assembly may be unnecessary. In such cases, a single bolt replacement could suffice, saving money.

4. **Longer Wait Times** Due to their popularity, these parts may be backordered, especially during peak riding seasons or after major recalls.

5. **No Upgrades** Unlike aftermarket parts, these do not offer performance enhancements or modifications. Riders looking to tweak their bike s setup may find aftermarket options more appealing.

6. **Depreciation Factor** If the bike is older (e.g., 2016-2017), the cost of OEM parts may not justify the investment compared to the bike s depreciated value.

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### **Conclusion**

The **Yamaha YZ450F Upper Engine Head Frame Mounting Bracket Bolts (B11-21425-00-00)** are a reliable and high-quality choice for riders who prioritize authenticity, durability, and long-term reliability. They are ideal for:

- **Complete restorations** of the bike to stock condition.

- **Riders who value OEM performance and resale value.**

- **Those who prefer working with parts they can trust for critical components.**

- **Budget-conscious buyers** who can find equally durable aftermarket alternatives at a lower cost.

- **Minor repairs** where only a single bolt needs replacement.

- **Riders seeking performance upgrades** beyond stock specifications.

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### **Recommendation**

- You are restoring the bike to factory condition or replacing a failed bracket assembly.

- You want to ensure compatibility and warranty coverage.

- You prioritize long-term reliability and resale value.

- You are on a tight budget and can find high-quality bolts (e.g., from brands like **Race Tech, OEM Replicas, or Motorex**) that meet or exceed OEM standards.

- You only need to replace a single bolt (check for loose or stripped bolts before committing to a full bracket replacement).

- You are looking for minor cost savings without sacrificing quality.

**Final Tip:** Always inspect the bracket and bolts for signs of wear (cracks, corrosion, or improper threading) before purchasing. If the issue is isolated, a single bolt replacement may be sufficient. For a complete assembly replacement, OEM is the safest choice.

Details:

Up for sale I have a used upper cylinder head to frame brackets and bolts. They will fit 2016 - 2017 Yamaha YZ 450F. They are in good working condition with no issues. Removed from a 60th anniversary Yamaha Yz 450F.

part #: b11214250000 prices

• $24.99-$34.99

specifications mocycfra:

• for models: 450f, Yz
• for makes: Yamaha
• for years: 2016-2017
• mpn: B11-21425-00-00
• type: Frame
• placement on vehicle: Upper

seller mocycfra:

• rating: 100.0%
• city: Farwell, Michigan
• # reviews: 2889

general mocycfra:

• Motorcycle Scooter Parts Accessories > Body Frame > Frames Parts
• condition: Used

payments mocycfra:

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

offer mocycfra:

• options: Ship-to-home
• quantity: 1
• sold: 0
• started: May 21, 2026
• availability: In Stock

returns mocycfra:

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

shipping mocycfra:

• class: Standard
• carrier: USPS
• type: Fixed
• cost: $10.00
• transit: 5-9 Days
• service: USPS Ground Advantage

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