ATHENA MNB100140125 Needle Bearing M-024 YW50

( Brand: Athena ), ( Manufacturer Part Number: MNB100140125 ), ( Part Type: Bearing ), ( Vendor: Lionparts ), ( Ships From: United States )

Review ATHENA Needle Bearing Yamaha 50 fits ZUMA 1997–2011

The **Athena MNB100140125 M-024 Needle Bearing** is a precision-engineered, high-performance replacement bearing specifically designed for the **Yamaha Zuma 50 YW50** models produced between **1997 and 2011**. This bearing is a critical component of the vehicle s drivetrain, ensuring smooth and efficient power transfer from the transmission to the rear wheel, which is essential for optimal handling, acceleration, and overall ride quality. Crafted from high-grade steel, the M-024 needle bearing features a compact yet robust design, allowing it to accommodate the tight clearance and unique mechanical requirements of the Zuma s compact engine and drivetrain system. Its needle-like rollers are strategically arranged to distribute load evenly, reducing friction and minimizing wear over time, which is particularly important for off-road and recreational use where the vehicle may encounter rough terrain, frequent stops, or aggressive riding conditions.

What sets this bearing apart is its **OEM-level compatibility**, meaning it is engineered to match the exact specifications of the original equipment manufacturer s part, ensuring a seamless fit without the need for modification or additional adjustments. The bearing is sealed with a durable rubber lip to protect against dust, debris, and moisture, which is crucial for maintaining longevity in environments where the Zuma may be exposed to sand, mud, or water. Additionally, the M-024 is designed to handle the moderate torque and speed ranges typical of the YW50 s 49cc single-cylinder engine, providing reliable performance whether the vehicle is being used for commuting, trail riding, or light off-roading. For maintenance-conscious riders, this bearing is a straightforward upgrade that can extend the life of the transmission and rear wheel assembly, reducing the risk of premature failure and costly repairs.

Installation of the Athena MNB100140125 is straightforward, thanks to its standardized dimensions and compatibility with standard bearing tools. The bearing s robust construction also makes it resistant to heat buildup, a common concern in small-engine applications where cooling efficiency may be limited. Whether you re restoring a classic Zuma or upgrading an existing unit, this bearing offers a balance of durability, performance, and ease of installation, making it an ideal choice for riders who demand reliability without compromising on quality. With proper installation and periodic maintenance, the M-024 needle bearing will contribute to a smoother, more responsive ride, ensuring your Yamaha Zuma remains in peak condition for years to come.

### **Pros and Cons of buying a Athena MNB100140125 M-024 Needle Bearing for Yamaha Zuma 50 YW50 (1997 2011)**

1. **Direct Fitment** The Athena MNB100140125 is specifically designed as an OEM replacement for the Yamaha Zuma 50 s primary drive needle bearing, ensuring compatibility without modifications.

2. **High-Quality Construction** Athena is a reputable brand known for producing durable, precision-engineered bearings. This unit is likely made from hardened steel with a robust cage system, reducing wear and improving longevity.

3. **Improved Performance** A fresh needle bearing eliminates friction and smooths out the chain s engagement with the sprocket, potentially reducing vibration and improving fuel efficiency.

4. **Prevents Premature Wear** Over time, the original bearing can wear out, leading to chain slippage, increased noise, or even chain breakage. Replacing it proactively can extend the life of the chain and sprocket.

5. **Ease of Installation** The bearing is designed for straightforward replacement, requiring only basic tools (chain breaker, chain pliers, and a socket set). No special expertise is needed.

6. **Cost-Effective Maintenance** Compared to replacing the entire chain or sprocket due to bearing failure, this is a relatively inexpensive fix (typically under $20 $30).

7. **Compatibility with Aftermarket Parts** If you plan to upgrade other components (e.g., a heavier-duty chain or sprocket), this bearing will still fit seamlessly.

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1. **Limited Availability** While Athena is a well-known brand, this specific bearing may not be stocked at every motorcycle parts store. You may need to order it online, which could introduce shipping delays.

2. **Potential Counterfeit Concerns** Some aftermarket bearings, even from reputable brands, may be counterfeit or subpar in quality. Always purchase from trusted sellers (e.g., Amazon, RockAuto, or authorized dealers) to avoid fakes.

3. **Chain and Sprocket Condition** If the chain or sprocket is already worn beyond specification, replacing just the bearing may not fully resolve driveline issues. A full drivetrain inspection is recommended.

4. **Installation Challenges for Beginners** While straightforward, improper installation (e.g., misalignment or incorrect torque) can lead to premature failure. If unsure, consulting a mechanic is advisable.

5. **No Significant Performance Gain** Unlike upgrading to a heavier-duty chain or sprocket, replacing the bearing primarily restores function rather than enhancing performance. Expect no noticeable speed or power improvements.

6. **Lifespan Depends on Usage** The bearing s longevity depends on riding conditions (e.g., off-road use accelerates wear). In severe conditions, it may need replacement sooner than expected.

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### **Conclusion**

The Athena MNB100140125 needle bearing is a **reliable, cost-effective solution** for restoring proper function to your Yamaha Zuma 50 s drivetrain. It addresses a common wear point that, if neglected, can lead to more expensive repairs. The pros outweigh the cons for most riders, especially those who prioritize maintenance and longevity over performance gains.

- **Buy it** if your Zuma s chain is still in decent condition and you re experiencing symptoms like chain slippage, unusual noise, or vibration. It s a simple, low-risk upgrade that can prevent bigger problems.

- **Pair it with a full drivetrain inspection** check the chain s wear (measure elongation or use a chain checker) and the condition of the sprocket. If either is beyond repair, replace them simultaneously for optimal results.

- **Source from a trusted seller** to ensure authenticity and quality. Avoid cheap knockoffs that may fail prematurely.

- **Follow installation guidelines carefully** lubricate the bearing properly and ensure the chain is correctly tensioned after replacement.

For most Yamaha Zuma 50 owners, this bearing is a **smart, preventive maintenance choice** that extends the life of the drivetrain without major hassle.

Details:

Brand: Athena, Part Number: MNB100140125. Yamaha Big Wheel 50 BW50 BUMP 1997 -1998.: Athena Needle Bearing For Yamaha Zuma 50 YW50 1997 -2011: 1997 -2011. To ensure you're receiving exactly what you want, some orders are sourced from various shipping facilities.

Athena needle bearings attach to the dudgeon pin and their high quality enables less frequent maintenance at an excellent price-quality ratio. Some items are available silver-plated and ideal for use in conditions of great rotational speed, high temperatures sudden acceleration. BETA Eldon 50 LC 1999 -2003. Note: Image is for reference only, actual product may vary slightly.

Free Ground Shipping. Greater resistance to stress compared the original.

part #: mnb100140125 prices

• $30.57-$239.00

specifications bearingmotorcycleiz:

• for models: Zuma
• for makes: Yamaha
• for years: 1997-2011
• brand: Athena
• mpn: Mnb100140125
• part type: Bearing
• vendor: Lionparts
• ships from: United States

returns bearingmotorcycleiz:

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

seller bearingmotorcycleiz:

• # reviews: 251053
• city: Wilmington,
• rating: 99.8%

general bearingmotorcycleiz:

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

shipping bearingmotorcycleiz:

• cost: $0.00
• transit: 3-7 Days
• type: Fixed
• carrier: FedEx
• class: Standard
• service: FedEx Ground / FedEx Home Delivery

offer bearingmotorcycleiz:

• sold: 0
• quantity: 5
• availability: In Stock
• options: Ship-to-home
• started: May 11, 2026

payments bearingmotorcycleiz:

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

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