1. Motorcycle Engine Bearings For Sale
  2. sku: 11719757422532722
  3. NAMURA ORNA-RA508297-NG

NAMURA ORNA-RA508297-NG Wristpin Bearing Bike

fits model: Pw80. make: Yamaha. year: 1983–2006.

Orna-ra508297-ng Namura 1983-2006 Yamaha Pw80 Dirt Bike Wristpin Bearing

( Brand: Namura ), ( Manufacturer Part Number: ORNA-RA508297-NG ), ( Part Type: Bearing )

Review NAMURA Yamaha Dirt Bike Wristpin Bearing fits PW80 1983–2006

The **Namura Orna-RA508297-NG** is a meticulously engineered, high-performance wristpin bearing designed specifically for Yamaha PW80 off-road motorcycles produced between the model years **1983 and 2006**. This precision-crafted component is a direct replacement for the original factory bearing, ensuring seamless compatibility and optimal performance for riders seeking reliability and durability in demanding trail, dirt track, or light off-road conditions. Manufactured from **high-grade, heat-treated steel** with a **chromium-plated surface**, the Orna-RA508297-NG bearing is engineered to withstand extreme stress, friction, and thermal fluctuations, making it an ideal upgrade for both stock and modified PW80 engines. Its **tight-tolerance construction** minimizes play and wear, reducing the risk of piston slap and extending the lifespan of the connecting rod and crankshaft assembly. The bearing s **sleek, interference-fit design** ensures a secure and stable installation, while its **self-lubricating properties** (when paired with the correct engine oil) help maintain smooth operation even under heavy loads. Whether used in competitive racing, long-distance trail riding, or routine maintenance, this bearing delivers the strength and precision required to keep the Yamaha PW80 s 79cc single-cylinder engine running at peak efficiency. Built to Namura s rigorous standards, the Orna-RA508297-NG is a trusted choice among off-road enthusiasts who demand nothing less than flawless performance from their motorcycle s critical internal components.

### **Pros and Cons of Buying a Yamaha PW80 Wristpin Bearing (Namura Orna-RA508297-NG, 1983 2006 Models)**

#### **Pros:**

1. **Compatibility and Fitment** The Namura Orna-RA508297-NG is specifically designed as a direct replacement for the original Yamaha PW80 wristpin bearing, ensuring an exact fit without modification. This reduces the risk of installation errors and ensures proper engine function.

2. **High-Quality Materials** Namura is a well-regarded aftermarket parts manufacturer known for using durable materials, including high-grade steel and precision-engineered components. This improves reliability compared to generic or low-quality aftermarket bearings.

3. **Extended Lifespan** A properly installed wristpin bearing can significantly reduce wear on the piston and connecting rod, potentially extending the engine s overall lifespan if the rest of the components are in good condition.

4. **Easier Maintenance** Since this is a direct replacement, mechanics familiar with Yamaha PW80 models can install it without complex adjustments. It also simplifies parts sourcing, as it s a widely available aftermarket part.

5. **Cost-Effective Solution** Compared to rebuilding or replacing the entire piston assembly, replacing just the wristpin bearing is a budget-friendly fix for common engine wear issues.

6. **Performance Stability** A failing wristpin bearing can cause excessive play, leading to knocking, reduced power, or even catastrophic engine failure. Replacing it restores smooth operation and prevents further damage.

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#### **Cons:**

1. **Limited Availability** While Namura parts are widely distributed, finding this specific bearing for a vintage Yamaha PW80 may require ordering from specialty motorcycle parts suppliers rather than a local bike shop. Shipping times could be longer than for more common models.

2. **Installation Complexity** Removing and installing a wristpin bearing requires disassembling the engine, which is a labor-intensive process. If the mechanic lacks experience with Yamaha PW80 engines, mistakes could occur, leading to further damage.

3. **Potential for Counterfeit Parts** Since this is an older model, there is a risk of purchasing counterfeit or low-quality knockoffs, especially if buying from untrusted online sellers. Always verify the seller s reputation and product authenticity.

4. **Underlying Engine Issues** If the wristpin bearing fails due to other neglected maintenance (e.g., poor lubrication, carbon buildup, or worn piston rings), replacing just the bearing may not fully resolve the problem. A full engine inspection is advisable.

5. **Cost vs. Rebuilding** While cheaper than a full rebuild, the labor cost to replace the bearing (if not doing it yourself) can still be significant. In some cases, it may be more economical to consider a used PW80 engine or a rebuild kit.

6. **Warranty Limitations** Aftermarket parts like this one typically come with limited or no warranty, especially for vintage models. If the bearing fails prematurely, the buyer bears the full cost of replacement.

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### **Conclusion:**

The Namura Orna-RA508297-NG wristpin bearing is a **reliable and cost-effective solution** for Yamaha PW80 owners experiencing wristpin wear or play, particularly for those who want a direct replacement without modifying the engine. Its high-quality construction and compatibility make it a strong choice for maintaining engine health. However, the **labor-intensive installation, potential for counterfeit parts, and underlying engine conditions** must be carefully considered before purchasing.

If the engine is otherwise in good condition and the bearing is the sole issue, this part is a **practical and recommended choice**. However, if the engine has other neglected problems (e.g., worn rings, excessive carbon, or rod bearing issues), a more comprehensive inspection or rebuild may be necessary to ensure long-term reliability.

### **Recommendation:**

- **Buy from a trusted supplier** (e.g., Namura s official distributors, reputable online marketplaces like **Cycle World, Cycle Gear, or eBay with verified sellers**) to avoid counterfeit parts.

- **Have a mechanic inspect the engine** before purchasing to confirm that the wristpin bearing is indeed the problem and that no other components (e.g., piston, rod, or crankshaft) are severely worn.

- **Consider DIY installation** if comfortable with motorcycle engine work, as it reduces labor costs. If not, ensure the mechanic is experienced with Yamaha PW80 engines.

- **Pair with other maintenance** (e.g., fresh oil, air filter, and spark plugs) to maximize the bearing s lifespan and overall engine performance.

- **Keep records** of the installation and any symptoms before and after replacement to verify the fix s effectiveness.

For most Yamaha PW80 owners facing wristpin issues, this Namura bearing is a **sound investment** that balances cost, quality, and compatibility. However, weigh the long-term engine condition against the immediate fix to avoid recurring problems.

Details:

This is helpful if you are buying multiple items. I need to exchange an item. 1983 - 2006 Yamaha PW80 Dirt Bike Namura Wristpin Bearing: Wrist-Pin Bearing Contains: One Bearing. Parts without fitment are to be assumed universal and may require vehicle modification.

Credit or Debit Card. Compatibility: Yamaha BW80 1986 - 1988, 1990 , PW 80 1983 2006. Actual Contents may vary from Photo Namura offers direct replacements for the original equipment as well hi-compression and a variety of oversized to meet your rides needs.: Brand: Namura, model Number: ORNA-RA508297-NG.

specifications bearingmotorcycleiz:

  • for models: Pw80
  • for makes: Yamaha
  • for years: 1983-2006
  • brand: Namura
  • mpn: Orna-ra508297-ng
  • part type: Bearing

offer bearingmotorcycleiz:

  • quantity: 2
  • sold: 0
  • options: Ship-to-home
  • availability: In Stock
  • started: February 27, 2026

shipping bearingmotorcycleiz:

  • cost: $0.00
  • class: Standard
  • transit: 3-6 Days
  • type: Fixed
  • service: Standard

returns bearingmotorcycleiz:

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

payments bearingmotorcycleiz:

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

general bearingmotorcycleiz:

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

seller bearingmotorcycleiz:

  • rating: 99.8%
  • city: Indiana, US
  • # reviews: 78696
for models: pw80, for makes: yamaha, for years: 1983-2006, part type: bearing,
category: motorcycle parts > motorcycle scooter parts accessories > engines engine parts > engine bearings, sku: 11719757422532722,
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