ATHENA P400485444116 Crankshaft Bearing Seal Kit

( Brand: Athena ), ( Manufacturer Part Number: P400485444116 ), ( Part Type: Bearing Seal Crankshaft )

Review ATHENA Crankshaft Bearing Seal Kit Yamaha fits YZ125 1994–2000

The **Athena P400485444116 Crankshaft Bearing Seal Kit** is a precision-engineered replacement solution specifically designed to restore optimal performance and longevity to the crankshaft sealing system on Yamaha YZ125 dirt bikes manufactured between 1994 and 2000. This high-quality kit addresses the critical function of preventing oil leaks while maintaining proper crankshaft alignment, ensuring smooth operation and reducing wear on vital engine components. Crafted from durable, heat-resistant materials, the seals in this kit are engineered to withstand the demanding conditions of off-road riding, where extreme temperatures, vibrations, and mechanical stress are common. The kit includes all necessary components typically featuring a crankshaft oil seal, gasket, and sometimes a thrust washer to provide a complete and hassle-free upgrade. Whether you're tackling rough trails or preparing your bike for a rebuild, this kit delivers reliable sealing performance, helping to eliminate oil leaks that can compromise engine efficiency and lead to costly damage over time. Ideal for both professional mechanics and DIY enthusiasts, the Athena seal kit ensures a tight, long-lasting fit, allowing your Yamaha YZ125 to run with confidence and reliability for years to come.

**Pros and Cons of buying a Athena P400485444116 Crankshaft Bearing Seal Kit for Yamaha YZ125 (1994 2000)**

### **Pros**

1. **Compatibility** This kit is specifically designed for the Yamaha YZ125 models from 1994 to 2000, ensuring a proper fit without modification. The part number confirms it matches the engine s crankshaft seal requirements, reducing the risk of installation errors.

2. **Quality Materials** Athena is a well-known brand in the motorcycle and ATV aftermarket, known for producing durable seals and gaskets. The materials used in this kit are likely to resist oil leakage and wear better than generic or low-quality alternatives.

3. **Easy Installation** The kit includes all necessary seals (typically the crankshaft oil seal and possibly the rear main seal), which simplifies the replacement process. This reduces the need for additional purchases and minimizes the risk of mismatched parts.

4. **Prevents Engine Damage** A failing crankshaft seal can lead to oil leaks, which may contaminate the clutch or transmission fluid, causing premature wear or failure. Replacing the seal proactively can extend the life of the engine and other drivetrain components.

5. **Cost-Effective Solution** Compared to the potential cost of repairing or replacing damaged components due to a failed seal, this kit offers a relatively inexpensive preventive measure. It s often cheaper than labor-intensive repairs if the seal fails unexpectedly.

6. **Warranty and Support** Athena products typically come with a warranty, providing some assurance against manufacturing defects. Additionally, the brand has a reputation for customer service, which can be helpful if issues arise during installation or use.

7. **Performance Reliability** A properly sealed crankshaft ensures smooth operation and reduces friction, which can slightly improve engine efficiency and longevity. This is particularly important for off-road bikes like the YZ125, where reliability is critical.

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### **Cons**

1. **Limited Availability** While Athena is a reputable brand, this specific part number may not be as widely stocked as more common OEM or aftermarket alternatives. You may need to order it online or from a specialty motorcycle parts supplier, which could delay your project.

2. **Potential Overkill for Minor Issues** If the seal failure is isolated to one component (e.g., only the rear main seal), replacing the entire kit might be unnecessary. However, since the kit includes both seals, it ensures a complete solution rather than a partial fix.

3. **Installation Complexity** Replacing crankshaft seals requires disassembling the engine to some extent, which can be time-consuming and technically challenging for inexperienced mechanics. If you re not comfortable with engine work, you may need to pay for professional labor, adding to the cost.

4. **Cost Compared to OEM** While Athena is a high-quality aftermarket brand, its parts may still be more expensive than genuine Yamaha OEM seals. If you prefer using original equipment, you might opt for a Yamaha-specific seal kit instead, though availability for older models can be limited.

5. **Risk of Improper Installation** If the seals are not installed correctly (e.g., improper torque, misalignment, or contamination), they may leak prematurely. This requires careful attention to the installation process, including cleaning surfaces and using the correct tools.

6. **Durability Variability** While Athena seals are generally reliable, their lifespan can depend on riding conditions, maintenance habits, and engine wear. In high-stress applications (e.g., aggressive off-roading or poor lubrication), the seals may wear out faster than expected.

7. **No Guarantee Against Underlying Issues** If the crankshaft or surrounding components are already damaged (e.g., worn bearings or misaligned parts), replacing the seals alone may not solve the problem. A full engine inspection might be necessary to address root causes.

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### **Conclusion**

The Athena P400485444116 crankshaft bearing seal kit is a strong choice for Yamaha YZ125 owners (1994 2000) looking to replace their crankshaft seals. Its compatibility, quality, and ease of use make it a practical solution for preventing oil leaks and engine damage. However, the decision to purchase it should consider factors like installation difficulty, cost compared to alternatives, and whether you re addressing a specific issue or performing preventive maintenance.

If you re comfortable with basic engine work and want a reliable, all-in-one solution, this kit is an excellent investment. For those who prefer OEM parts or have access to professional help, a Yamaha-specific seal kit or consulting a mechanic might be worth exploring. Ultimately, the kit s pros outweigh the cons for most riders, provided you approach the installation with care.

### **Recommendation**

- You re experiencing oil leaks from the crankshaft seals or suspect impending failure.

- You want a complete, high-quality replacement without mixing parts from different sources.

- You re prepared to invest time in proper installation or have access to a mechanic for assistance.

- You prioritize durability and want to avoid potential engine damage from seal failure.

- You re on a tight budget and can find a comparable OEM or aftermarket kit at a lower cost.

- You re only replacing one seal (though Athena s kit includes both, which is ideal for long-term reliability).

- You lack experience with engine disassembly and are unsure about installing the seals correctly.

For most Yamaha YZ125 owners facing seal issues, the Athena kit is a **highly recommended choice** due to its reliability and compatibility. Pair it with proper maintenance (e.g., regular oil changes and inspections) to maximize its lifespan.

Details:

Strict quality control for every component: All parts undergo rigorous checks to ensure dimensional accuracy, mechanical efficiency, and long-term reliability. Brand: Athena, Part Number: 6. Athena kits are the trusted choice for those seeking superior components crankshaft rebuilding. Fitment: Yamaha YZ125 1994 -2000.

Note: Image is for reference only, actual product may vary slightly. Bearings and oil seals in one complete kit: Each kit includes the main crankshaft bearings necessary engine. The bearings are sourced from top-tier manufacturers such as SKF, NTN, and KOYO, ensuring premium quality, precision, resistance to wear. To ensure you're receiving exactly what you want, some orders are sourced from various shipping facilities.

Athena Crankshaft Bearing Seal Kit For Yamaha YZ125 1994 2000 6: 6. Bearings from SKF, NTN, or KOYO included. Free Ground Shipping. Built to withstand extreme operating conditions: All components are selected perform under high thermal and mechanical stress, including elevated temperatures, heavy loads, exposure contaminants.

OEM-level fitment and easy installation: Each kit is engineered to match the original engine configuration, making installation straightforward efficient. Built to handle thermal and mechanical stress.: Bearings and seals for full crankshaft overhaul.

part #: p400485444116 prices

• $57.56-$72.81

specifications bearingmotorcycleiz:

• for models: Yz125
• for makes: Yamaha
• for years: 1994-2000
• brand: Athena
• mpn: P400485444116
• part type: Bearing Seal Crankshaft

general bearingmotorcycleiz:

• condition: New
• Motorcycle Scooter Parts Accessories > Engines Engine Parts > Engine Bearings

offer bearingmotorcycleiz:

• sold: 0
• availability: In Stock
• started: May 2, 2026
• quantity: 1
• options: Ship-to-home

shipping bearingmotorcycleiz:

• transit: 4-7 Days
• type: Fixed
• cost: $0.00
• carrier: FedEx
• service: FedEx Ground / FedEx Home Delivery
• class: Standard

payments bearingmotorcycleiz:

• credit card: Diners-club
• wallet: Google-pay
• other

seller bearingmotorcycleiz:

• rating: 99.8%
• city: Wilmington,
• # reviews: 249783

returns bearingmotorcycleiz:

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

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