HONDA 91061-ML0-731 Bearing 6908LU

( Manufacturer Part Number: 91061-ML0-731 ), ( Part Type: Bearing )

Review HONDA Oem Bearing

The **Honda 91061-ML0-731 Bearing (6908LU)** is a precision-engineered, high-performance radial ball bearing designed specifically for Honda s internal combustion engine applications, particularly within the crankshaft and camshaft systems of select models. This bearing is a **6908LU series unit**, which falls under the ABEC-1 (Annular Bearing Engineers Committee) classification, ensuring a balance between cost efficiency and reliable performance for automotive use. Constructed from high-grade, case-hardened steel, the bearing features a **60-degree contact angle** and a **70mm outer diameter**, making it ideal for supporting axial and radial loads with minimal friction and wear. The **6908LU designation** indicates a specific inner diameter of **35mm**, a bore width of **11mm**, and a robust cage system that maintains optimal ball spacing, reducing heat generation and extending the bearing s operational lifespan. This component is engineered to withstand the demanding conditions of high-speed rotation, temperature fluctuations, and the dynamic stresses inherent in Honda s engine designs, particularly those found in the **K-series, R-series, and ZC-series engines**, where it plays a critical role in maintaining smooth crankshaft and camshaft operation. The bearing s **sealed construction** helps prevent contamination from engine oil degradation, debris, and moisture, further enhancing durability and reliability. Whether installed in a high-performance street bike, a touring motorcycle, or a classic Honda model, this bearing is a critical component that ensures the longevity and efficiency of the engine s rotating assemblies, delivering consistent performance under heavy loads and prolonged use.

The **Honda 91061-ML0-731 bearing (6908LU)** is a ball bearing used in various Honda applications, including the **CB600F, CB650R, and other models** with the same bearing specification. Below is a detailed analysis of its pros and cons, followed by a conclusion and recommendation.

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### **Pros of buying a Honda 91061-ML0-731 Bearing (6908LU)**

1. **OEM Quality and Reliability**

- Honda uses high-quality bearings in its original equipment, and this part is designed to meet strict durability standards. The **6908LU** (a sealed, single-row deep-groove ball bearing) is a well-established design used in motorcycles, ATVs, and industrial applications.

- The **ML0-731** designation suggests it is a **direct-fit replacement**, meaning it should align perfectly with the original bearing housing and shaft dimensions, reducing installation errors.

2. **Sealed Construction (LU Designation)**

- The **"LU"** in **6908LU** indicates it is a **sealed bearing**, meaning it has a **rubber or elastomeric seal** to prevent contaminants (dust, dirt, water) from entering. This extends the bearing s lifespan, especially in outdoor or dusty environments.

- Reduces the need for frequent greasing or maintenance compared to open bearings.

3. **Widely Available and Affordable**

- As an **OEM or aftermarket part**, it is relatively easy to find from reputable suppliers (e.g., **Honda dealerships, RockAuto, eBay, or specialty bearing stores**).

- Pricing is competitive compared to premium aftermarket bearings, making it a cost-effective solution for most riders.

4. **Compatibility with Aftermarket Upgrades**

- Many performance modifications (e.g., **crankshaft upgrades, clutch kits, or engine swaps**) require this bearing. Its availability ensures compatibility with aftermarket parts without forcing a full rebuild.

5. **Long Service Life Under Normal Conditions**

- If properly installed and maintained (though sealed bearings require less maintenance), it can last **50,000 100,000 miles** in a motorcycle, depending on riding conditions.

- Less prone to premature failure from dirt ingress compared to open bearings.

6. **Easy Installation**

- Most **6908LU bearings** are press-fit into the housing and slide onto the shaft. No special tools are typically required beyond a **bearing puller/press** and **grease**.

- Honda s design often includes **snap rings or retaining clips**, making removal and replacement straightforward.

7. **Backed by Honda s Reputation**

- Honda bearings are known for **consistent quality control**, reducing the risk of early failure due to manufacturing defects (a common issue with cheaper aftermarket knockoffs).

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### **Cons of buying a Honda 91061-ML0-731 Bearing (6908LU)**

1. **Potential for Counterfeit or Low-Quality Parts**

- The **aftermarket market is flooded with counterfeit Honda parts**, especially on platforms like **eBay or AliExpress**. These may be **cheaply made, poorly sealed, or mislabeled**, leading to:

- **Premature failure** (e.g., seal degradation, rust, or bearing race wear).

- **Incorrect sizing** (e.g., a **6908LU** labeled as **ML0-731** but actually a **6908** without a seal).

- **Solution:** Purchase from **authorized dealers, RockAuto, or verified sellers** with return policies.

2. **Sealed Bearings Can Be Less Adjustable**

- Since the **6908LU is sealed**, it **cannot be regreased** like open bearings. If the seal fails (e.g., from heat or contamination), the bearing may **dry out or seize**.

- Some riders prefer **open bearings** (e.g., **6908Z or 6908RS**) for easier maintenance, though this requires more frequent greasing.

3. **Limited Lifespan in Harsh Conditions**

- **Extreme heat** (common in high-performance or heavily modified engines).

- **Chemical exposure** (e.g., brake fluid leaks, fuel spills).

- **Poor installation** (e.g., improper seating can damage the seal).

- In **dusty or off-road environments**, even sealed bearings may wear faster if not properly shielded.

4. **Potential for Misalignment Issues**

- **Excessive play** (looseness).

- **Premature wear** on the races or balls.

- Requires **precise installation** if the fit is too loose or tight, it can cause **binding or overheating**.

5. **Not All Aftermarket Bearings Are Equal**

- **Shorter lifespan** compared to Honda s original parts.

- **Higher risk of failure under heavy loads** (e.g., in high-RPM engines or ATVs).

- **Brands like SKF, NTN, or FAG** often produce higher-quality alternatives, but they may cost more.

6. **Removal Can Be Difficult**

- If the bearing **seizes due to rust or lack of lubrication**, removing it without damaging the housing can be challenging. A **strong bearing puller** or **heat treatment** may be needed, which can risk warping the housing.

7. **Limited Customization Options**

- Unlike **open bearings**, you **cannot add extra grease or lubricants** to extend life. Some performance riders prefer **open bearings with high-temperature grease** for extreme conditions.

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### **Conclusion**

The **Honda 91061-ML0-731 (6908LU) bearing** is a **reliable, cost-effective, and widely available** solution for Honda applications requiring a **sealed, single-row ball bearing**. Its **OEM quality, ease of installation, and contamination resistance** make it a **strong choice for most riders**, especially those who prioritize **low maintenance**.

However, **quality varies significantly in the aftermarket**, and **counterfeit parts are a major risk**. Additionally, **sealed bearings are not infinitely adjustable**, and **harsh conditions can reduce their lifespan**. If you **prioritize longevity in extreme environments**, you may consider **higher-end aftermarket bearings (e.g., SKF, NTN)** or **open bearings with custom lubrication**.

For **most stock or lightly modified Honda bikes**, the **ML0-731 bearing is an excellent, budget-friendly option** **as long as it is purchased from a trusted source**.

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### **Recommendation**

1. **Buy from a Reputable Source**

- **Authorized Honda dealers** (most reliable, but expensive).

- **RockAuto, Dorman, or Speedhawk** (verified aftermarket parts).

- **Avoid unknown sellers** (e.g., random eBay listings without reviews or return policies).

2. **Verify the Part Number**

- Ensure it is **actually a 6908LU** (not a mislabeled 6908 or 6908Z).

- Check for **Honda s ML0-731 marking** (some aftermarket parts may not match).

3. **Inspect Before Installation**

- Look for **rust, nicks, or damaged seals**.

- Ensure the **inner and outer races** are smooth (no pitting or corrosion).

4. **Consider an Alternative if Needed**

- For **high-performance or off-road use**, a **higher-quality sealed bearing (e.g., SKF 6908LU)** or an **open bearing (6908Z) with frequent greasing** may be worth the extra cost.

- If the bearing is **seized or damaged**, **do not force installation** replace the housing or shaft if necessary.

5. **Maintain Proper Lubrication (If Possible)**

- Even though it s sealed, **keep the surrounding area clean** to prevent contaminants from degrading the seal over time.

For **most Honda applications**, the **Honda 91061-ML0-731 (6908LU) bearing is a solid, reliable choice** **when sourced correctly**. If you re unsure about the part s authenticity or need **maximum durability**, consider a **premium aftermarket alternative**. Always **follow proper installation procedures** to maximize its lifespan.

Details:

Over 20,000 Honda parts in stock and ready to ship. Peak Honda World. Correct fit guaranteed no aftermarket substitutions. Part Number: 91061-ML0-731.

91061-ML0-731 Bearing 6908Lu. Manufacturer: Honda. New, unused, in original manufacturer packaging.

part #: 91061ml0731 prices

• $54.00-$83.00

specifications bearingmotorcycleiz:

• for makes: Honda
• mpn: 91061-ml0-731
• part type: Bearing

returns bearingmotorcycleiz:

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

general bearingmotorcycleiz:

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

shipping bearingmotorcycleiz:

• cost: $10.79
• service: UPS Ground Saver, UPS Ground, USPS Ground Advantage, USPS Priority Mail
• type: Calculated
• carrier: UPS, USPS
• class: Economy, Standard, Expedited
• transit: 5-9 Days

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seller bearingmotorcycleiz:

• rating: 100.0%
• # reviews: 122
• city: Littleton, Colorado

offer bearingmotorcycleiz:

• options: Ship-to-home
• quantity: 1
• availability: In Stock
• started: April 22, 2026
• sold: 0

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