HONDA 91001-KFO-018 Crankshaft Bearing

( Manufacturer Part Number: 91001-KFO-018 ), ( Type: Crankshaft Bearing ), ( Country Of Origin: United States ), ( Color: Red ), ( Manufacturer Warranty: Unspecified Length ), ( Storage Location: G6 Zsc3-n Buk 14 )

Review HONDA Crankshaft Bearing fits TRX400EX TRX400X XR400R 1996–2014

The **Honda 91001-KFO-018 crankshaft bearing** is a precision-engineered, high-performance component designed exclusively for the **TRX400EX, TRX400X, and XR400R** models produced between **1996 and 2014**. This bearing is a critical part of the engine s crankshaft assembly, ensuring smooth operation, optimal power transfer, and long-term durability by reducing friction between the crankshaft journals and the engine block s main bearing caps. Crafted from **high-grade, corrosion-resistant steel** and coated with a **thin, durable layer of anti-friction material**, this bearing is engineered to withstand the rigorous demands of off-road use, including extreme temperatures, heavy loads, and prolonged exposure to dust, moisture, and vibration. The **91001-KFO-018** is a **main bearing set**, typically consisting of **two upper and two lower bearings** (or a full set depending on the application), each meticulously machined to Honda s exacting specifications to maintain proper crankshaft alignment and minimize wear. Whether replacing a worn-out bearing due to high-mileage use, off-road abuse, or a failed engine rebuild, this bearing ensures reliable performance, helping to prevent catastrophic engine failure and extend the lifespan of the ATV s powerplant. Its compatibility with Honda s **400cc single-cylinder engines** makes it an essential aftermarket and OEM replacement part for enthusiasts and mechanics seeking to restore or enhance the reliability of their TRX400-series vehicles.

### **Pros and Cons of buying a Honda 91001-KFO-018 (96-14 TRX400EX/TRX400X/XR400R Crankshaft Bearing)**

1. **OEM Quality** This is a genuine Honda part, meaning it meets the manufacturer s exact specifications for fit, performance, and durability. OEM components are designed to match the original engine s tolerances, reducing the risk of premature wear or failure.

2. **Reliability** Honda is known for producing high-quality, long-lasting parts. A crankshaft bearing from the original manufacturer is less likely to fail compared to aftermarket alternatives, especially if the engine is heavily used or modified.

3. **Compatibility** The part is explicitly listed for the **TRX400EX (96-14), TRX400X, and XR400R**, ensuring a perfect fit without modification. This eliminates guesswork and potential installation issues that can arise with non-OEM bearings.

4. **Warranty Coverage** If purchased directly from Honda or an authorized dealer, the part may come with a warranty, providing peace of mind in case of defects. Some third-party sellers may also offer warranties, though these vary by retailer.

5. **Performance Consistency** Since it s a factory-replacement part, it will perform as expected in terms of smooth operation, noise reduction, and load-bearing capacity. Aftermarket bearings, even high-quality ones, may not always match the precision of OEM components.

6. **Ease of Installation** Being an original part, it is designed to integrate seamlessly with the engine s existing components. This reduces the risk of installation errors that could lead to further damage.

7. **Long-Term Cost Savings** While OEM parts are typically more expensive upfront, they can save money in the long run by avoiding repeated failures or the need for additional repairs caused by inferior aftermarket parts.

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1. **Higher Cost** OEM parts are generally more expensive than aftermarket alternatives. For example, a genuine Honda crankshaft bearing may cost significantly more than a comparable aftermarket bearing from brands like **Fel-Pro, Moroso, or Sealed Power**.

2. **Limited Availability** Depending on the region, genuine Honda parts may not always be readily available in local stores. Some buyers may need to order online, which could involve shipping delays or additional fees.

3. **Potential Overkill for Minor Use** If the engine is in excellent condition and the bearing failure is isolated (e.g., due to a one-time issue like contamination or a single misfire), replacing with an OEM bearing might be excessive. In such cases, a high-quality aftermarket bearing could suffice.

4. **No Additional Features** Unlike some aftermarket bearings, OEM parts do not come with added features such as reinforced coatings, special lubrication, or extended service intervals. For high-performance or extreme-use applications, aftermarket bearings with advanced technologies may offer advantages.

5. **Depreciation Risk** If the vehicle is older or has significant mileage, the cost of an OEM bearing may not be justified if the engine is nearing the end of its lifespan. In such cases, budgeting for a rebuild or replacement engine might be more practical.

6. **Installation Expertise Required** While the part itself is straightforward, improper installation (e.g., incorrect torque, misalignment, or contamination) can void warranties and lead to further damage. This requires either mechanical expertise or professional installation.

7. **Environmental and Ethical Considerations** Some buyers prefer aftermarket or refurbished parts to reduce waste from new manufacturing. However, this is more of a personal preference than a practical drawback.

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### **Conclusion**

The **Honda 91001-KFO-018 crankshaft bearing** is an excellent choice if you prioritize **reliability, longevity, and exact fit** for your **TRX400EX/TRX400X/XR400R**. It is the safest option for restoring or maintaining an engine to factory specifications, especially if the vehicle is used for heavy-duty tasks, off-roading, or high-mileage applications. The upfront cost is justified by its performance and durability, particularly for those who value OEM quality.

However, if budget is a concern or the engine is near the end of its life, a **high-quality aftermarket bearing** (e.g., from **Fel-Pro, Moroso, or Sealed Power**) could be a cost-effective alternative without sacrificing performance. Aftermarket bearings often come with warranties and may include additional features like reinforced construction or better lubrication.

For most **TRX400EX/TRX400X/XR400R owners** facing a crankshaft bearing failure, the **OEM part is the recommended choice** due to its proven track record. If the engine is heavily modified or used in extreme conditions, consider pairing it with an aftermarket bearing that offers enhanced durability.

- You want the most reliable, long-lasting solution.

- The engine is in good condition and you plan to keep the vehicle for the long term.

- You have the budget for a genuine part and prefer factory specifications.

- You are on a tight budget and the engine is not heavily stressed.

- The failure is isolated (e.g., due to a single incident), and you want to avoid unnecessary costs.

- You prefer aftermarket brands with strong warranties and additional performance features.

Always ensure proper installation and follow Honda s maintenance guidelines to maximize the bearing s lifespan. If unsure, consult a professional mechanic to confirm the need for replacement and assess the overall engine condition.

Details:

4.8 out of 5 stars across 322 reviews. We started with a single motorcycle dismantled in home garage. Item must be in original, uninstalled condition with no modifications. Every part is one-of-a-kind.

FREE shipping on every order to the lower 48 states. Do you combine shipping?, Yes. Do you accept offers?, Some listings offers.

Fits: 1999 2008 Honda TRX400EX Sportrax, 2009 2014 TRX400X, 1996 2004 XR400R, Fitment, Fits 1999 2014 TRX400EX, TRX400X Spotlight: A Day Inside . One-Of-A-Kind When Its Gone, Gone 96-14 Honda TRX400EX TRX400X XR400R Crankshaft Bearing 91001-KFO-018:: This genuine crankshaft bearing is a critical engine component designed to support the and ensure smooth rotation within case. Please verify the part number and compatible model's before purchasing. Look for the Make Offer button on listing page.

Manufactured to precise OEM specifications for maximum durability and high-speed performance.: Are these genuine OEM parts?, Yes. We review all reasonable offers promptly.

part #: 91001kfo018 price

• $68.74

specifications bearingmotorcycleiz:

• for models: Trx400ex, Trx400x, Xr400r
• for makes: Honda
• for years: 1996-2014
• mpn: 91001-kfo-018
• type: Crankshaft Bearing
• country of origin: United States
• color: Red
• manufacturer warranty: Unspecified Length
• storage location: G6 Zsc3-n Buk 14

seller bearingmotorcycleiz:

• # reviews: 229967
• city: Odessa, Florida
• rating: 99.5%

returns bearingmotorcycleiz:

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

offer bearingmotorcycleiz:

• sold: 0
• availability: In Stock
• options: Ship-to-home
• started: May 15, 2026
• quantity: 2

general bearingmotorcycleiz:

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

payments bearingmotorcycleiz:

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

shipping bearingmotorcycleiz:

• carrier: FedEx, USPS
• transit: 5-12 Days
• cost: $0.00
• class: Standard, Expedited, One-day
• service: FedEx Ground / FedEx Home Delivery, USPS Priority Mail, FedEx 2Day, Overnight
• type: Fixed

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