YAMAHA 2GC-21425-00-00 Engine Motor Mount Bolt Bracket Set 334-639 Fx

( Manufacturer Part Number: 2GC-21425-00-00 ), ( Part Type: Bracket Engine Motor Mount Bolt ), ( Country Of Origin: Japan )

Review YAMAHA #334-639 Engine Motor Mount Bolt Bracket Set Fx fits YZ450F YZ 450 2016–2018

The **Yamaha 2GC-21425-00-00 334-639 Engine Motor Mount Bolt Bracket Set** is a precision-engineered replacement component designed specifically for Yamaha YZ450F and YZ450FX models manufactured between **2016 and 2018**. This high-quality bracket set is meticulously crafted to ensure a secure and stable connection between the engine and the frame, maintaining optimal alignment and reducing unnecessary stress on critical suspension and steering components. Engineered from durable, heat-treated steel, the bolts and brackets are built to withstand the rigorous demands of off-road riding, including high-G forces, vibrations, and repeated impacts encountered on rough terrain. The set includes all necessary hardware including **high-strength bolts, washers, and mounting brackets** to restore proper functionality to the engine motor mount assembly, which is essential for reliable performance and longevity of the bike s drivetrain. Whether addressing wear from normal wear and tear or replacing damaged components after an accident, this genuine Yamaha part ensures a perfect fit and seamless integration with the existing motor mount system. By maintaining proper tension and alignment, this bracket set helps prevent premature wear on the engine mounts, steering components, and suspension, ultimately enhancing the overall durability and ride quality of your YZ450F or YZ450FX. Ideal for both professional mechanics and DIY enthusiasts, this part is a must-have for anyone seeking to restore factory-level performance and reliability to their Yamaha dirt bike.

### **Pros and Cons of buying a Yamaha 2GC-21425-00-00 (334-639) Engine Motor Mount Bolt Bracket Set for YZ450F/YZ450FX (2016-2018)**

1. **Direct OEM Fitment** This part is manufactured by Yamaha and is designed specifically for the 2016-2018 YZ450F/YZ450FX models, ensuring a perfect match without modifications.

2. **Improved Reliability** Replacing worn or damaged motor mount bolts and brackets helps prevent engine sag, excessive vibration, and potential damage to the engine mounts or subframe.

3. **Prevents Loose Components** Over time, bolts can loosen due to vibration, leading to misalignment or even engine detachment in extreme cases. This set ensures a secure fit.

4. **Cost-Effective Replacement** Compared to full engine mount replacements, this bolt and bracket set is a budget-friendly solution for addressing minor wear or damage.

5. **Easy Installation** The part comes as a complete set, reducing the need for sourcing individual components separately. Installation typically requires basic tools and can be done in under an hour.

6. **Maintenance-Friendly** Regularly replacing these components as part of routine maintenance can extend the lifespan of your engine mounts and subframe.

7. **Yamaha Warranty Coverage** If purchased directly from Yamaha or an authorized dealer, the part may still be under warranty, providing peace of mind.

1. **Limited Use Beyond Engine Mounts** This set is specifically for the motor mount bracket and bolts, not for other engine-related components (e.g., crankshaft bolts, camshaft bolts). If other parts are worn, additional replacements may be needed.

2. **No Performance Upgrades** Unlike aftermarket engine mounts designed for stiffer support or reduced vibration, this is a direct replacement with no performance benefits.

3. **Potential for Counterfeit Parts** If purchased from a third-party seller (e.g., eBay, Amazon, or non-Yamaha dealers), there is a risk of receiving counterfeit or low-quality replicas that may fail prematurely.

4. **May Not Address Underlying Issues** If the engine mounts themselves are degraded, replacing just the bolts and brackets will not fully resolve the problem. A full engine mount replacement may still be necessary.

5. **Minimal Aesthetic Impact** Unlike aftermarket parts that may offer custom finishes or designs, this is a functional replacement with no visual changes.

---

### **Conclusion**

The **Yamaha 2GC-21425-00-00 (334-639) Engine Motor Mount Bolt Bracket Set** is a **practical and cost-effective solution** for maintaining or restoring proper engine support in your 2016-2018 YZ450F/YZ450FX. It is ideal for:

- Preventing bolt failure and engine misalignment.

- Addressing minor wear in the motor mount system.

- Serving as a routine maintenance upgrade.

However, it is **not a comprehensive fix** if the engine mounts themselves are severely worn or damaged. In such cases, a full engine mount replacement would be more appropriate.

---

### **Recommendation**

- **Buy from an Authorized Source** Purchase directly from Yamaha, an official dealer, or a trusted motorcycle parts retailer to ensure authenticity and warranty coverage.

- **Check for Additional Wear** While installing this set, inspect the engine mounts, subframe, and surrounding bolts for signs of damage. Replace any compromised parts to avoid future issues.

- **Follow Installation Guidelines** Use the correct torque specifications (typically found in the owner s manual or Yamaha service manual) to avoid overtightening or loosening.

- **Consider a Full Engine Mount Kit** If the engine mounts are visibly sagging or cracked, investing in a complete engine mount replacement (e.g., **Yamaha 2GC-21426-00-00**) may be worth the extra cost for long-term reliability.

- **Budget-Friendly Alternative** If this set is unavailable or too expensive, high-quality aftermarket alternatives (e.g., **MotoPro, OEM-Style brands**) can be a viable substitute, though always verify compatibility.

**Final Verdict:** This bolt and bracket set is a **smart, low-risk upgrade** for maintaining your bike s structural integrity, especially if you re performing routine maintenance. However, prioritize the health of the engine mounts themselves for optimal long-term performance.

Details:

Off a 2016 YZ450Fx.

part #: 2gc214250000 prices

• $20.00-$29.99

specifications cyclevintagee:

• for models: Yz450f, Yz, 450
• for makes: Yamaha
• for years: 2016-2018
• mpn: 2gc-21425-00-00
• part type: Bracket Engine Motor Mount Bolt
• country of origin: Japan

payments cyclevintagee:

• other
• money order
• credit card: Visa
• wallet: Paypal

general cyclevintagee:

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

returns cyclevintagee:

• policy: No Returns

seller cyclevintagee:

• city: Beaver, Pennsylvania
• # reviews: 118
• rating: 98.0%

shipping cyclevintagee:

• class: Standard
• transit: 3-8 Days
• cost: $0.00
• service: USPS Ground Advantage
• type: Calculated
• carrier: USPS

offer cyclevintagee:

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

Yamaha 2GC-21425-00-00 Is Similar To:

• 05-2802 Yamaha Rocky Piston Set Complete Not Wiseco Vertex Pro (26.9% similar) This is a 2ND over piston kit. Fits the yamaha DT-1. Free shipping anywhere in the us. This is a complete kit new old stock rocky piston. Piston, rings, cir clips, and wrist pin...(April 25th, 2018)
• 103-93-a Rensen Honda Yamaha Nos Acorn Engine Cylinder Head Nut Set (29.8% similar) Please look at all the pictures and read whole. They may not be clean. Any questions. They may have repairs. Oem original equipment manufacturer which may be new or used items for that machine. They may need some repairs. It is also cheaper if you do not need a lift gate truck. Not looking at the ...(April 25th, 2018)
• 122-11601-21 Yamaha Vintage Motorcycle Dirt Bike Over Piston Ring Set (33.1% similar) This listing is for an oem yamaha piston ring set. 50MM or 2ND over piston ring set...(December 26th, 2018)
• 122-11610-11 Yamaha Vintage Motorcycle Dirt Bike Over Piston Ring Set (33.1% similar) These are nos parts, the part number for this piston ring set is. This listing is for an oem yamaha piston ring set. 25MM or 1ST over piston ring set...(December 26th, 2018)
• 12v Cm11-50 Yamaha Ignition Coil With Bracket (36% similar) ...(December 16th, 2018)
• 13-008 Shindy Nos Yamaha Fork Oil Seal Suzuki Set Of (23.3% similar) Nos shiny yamaha fork oil seal RD400 TS650 DT250 Suzuki TS400 set of...(October 25th, 2018)
• 15-5520 Yamaha Cycle Country Mount (29.7% similar) Ships same day. This part may be compatible with multiple yamaha model's...(December 15th, 2017)
• 152-25131-00 Yamaha Nos Brake Shoe Set (27.3% similar) Some parts may have a protective coating, or light surface rust corrosion. All parts listed as nos are genuine ex-dealer stock and guaranteed. This will assure an accurate combined shipping cost...(November 12th, 2018)
• 159-11601-20-00 Yamaha 1967 Ym2c Yds5 Piston Ring Set 50 Over (29.7% similar) Nos oem yamaha rings for YM2C or YDS5 2 OS. 50THIS yamaha piston ringlet 2ND is used on these model's and components YDS5 crank and piston 1967 YM2C crank and piston...(February 18th, 2016)
• 15a-21471-00-35 1rl-21471-00-35 Yamaha Belly Pan Engine Protector (25.2% similar) Lock: 83 yam XT200 leg balk rates the me link above to see my 2012 bike inventory. There is no return on all larger items which include: complete bikes bike frames engines oversize 2-3 shipped these are sold as. Yamaha XT125 XT200 belly pan engine protector 15A 1RL P/N: 35FITS: 6 model's: 82-83 j ...(April 21st, 2018)
• 183-11601-00 Yamaha Genuine Oem Std Ring Set (26.1% similar) Cross reference info: please double check the applications listed as this info is copied and pasted into offer from software produced by manufacturer or aftermarket companies. No other parts are included. One ring set genuine yamaha oem,nos,new, 00PISTON ringlet std shown to fit the following model'...(October 18th, 2018)