1. Motorcycle Engine Bearings For Sale
  2. sku: 11832681865902891
  3. NAMURA ORNA-RA508703-NG

NAMURA ORNA-RA508703-NG Wristpin Bearing Bike

fits model: Kx60. make: Kawasaki. year: 1983–1984.

Orna-ra508703-ng Namura 1983-1984 Kawasaki Kx60 Dirt Bike Wristpin Bearing

( Brand: Namura ), ( Manufacturer Part Number: ORNA-RA508703-NG ), ( Part Type: Bearing )

Review NAMURA Kawasaki Dirt Bike Wristpin Bearing fits KX60 1983–1984

The **Namura Orna-RA508703-NG** is a meticulously engineered, high-performance wristpin bearing designed specifically for the **1983 1984 Kawasaki KX60** dirt bike, a model renowned for its lightweight frame, nimble handling, and aggressive off-road capabilities. This precision-machined bearing is crafted from **high-grade, nitrided steel**, ensuring exceptional durability, resistance to wear, and superior load-bearing capacity under the demanding conditions of motocross and enduro racing. The **RA508703-NG** features a **smooth, polished surface finish** that minimizes friction, allowing the wristpin to rotate with near-seamless efficiency, thereby reducing heat buildup and prolonging the lifespan of both the bearing and the connecting rod assembly. Unlike standard aftermarket bearings, this Namura component is **reverse-engineered to exacting specifications**, matching the original Kawasaki tolerances while incorporating modern advancements in bearing technology for enhanced performance. The **interference fit design** ensures a secure, vibration-dampening installation, critical for maintaining structural integrity during high-stress maneuvers like wheelies, jumps, and aggressive cornering. Whether you're a competitive racer pushing the limits of the KX60 s 60cc single-cylinder engine or a weekend warrior seeking reliable, high-performance parts, the **Orna-RA508703-NG** delivers the strength, precision, and longevity required to keep your bike running at its peak. Backed by Namura s reputation for quality and backed by a robust warranty, this bearing is an ideal upgrade for those looking to restore factory-level reliability or optimize their bike s power delivery and durability.

### Pros and Cons of Buying a Namura Orna-RA508703-NG 1983-1984 Kawasaki KX60 Wristpin Bearing

#### **Pros:**

1. **Compatibility and Fit:** The Namura Orna-RA508703-NG is specifically designed for the 1983-1984 Kawasaki KX60, ensuring a precise fit without modification. This reduces the risk of improper installation or premature wear.

2. **Durability:** Namura is a well-regarded brand in the motocross and off-road aftermarket, known for producing high-quality, long-lasting components. The wristpin bearing is likely made from durable materials like steel or high-grade alloys, which can withstand the stresses of motocross riding.

3. **Performance:** A quality wristpin bearing reduces friction in the crankshaft assembly, which can improve engine efficiency, reduce heat buildup, and extend the lifespan of the crankshaft and connecting rod. This can lead to smoother operation and better overall performance.

4. **Ease of Installation:** Since the part is designed for your specific model, it should fit seamlessly with minimal adjustments, making the replacement process straightforward for someone with basic mechanical skills.

5. **Cost-Effective Replacement:** While not the cheapest option, it is likely more affordable than a full engine rebuild or replacement. A bearing failure can lead to catastrophic engine damage, so replacing it proactively can save money in the long run.

6. **Warranty and Support:** Namura parts often come with warranties or are backed by reputable sellers, providing peace of mind in case of defects or installation issues.

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#### **Cons:**

1. **Price:** High-quality aftermarket parts like this wristpin bearing may be more expensive than OEM (original equipment manufacturer) alternatives. If you are on a tight budget, this could be a drawback.

2. **Availability:** While Namura is a reputable brand, availability may vary depending on the region or seller. You may need to order online, which could involve shipping delays or additional costs.

3. **Installation Complexity:** Although the part is designed for your bike, replacing a wristpin bearing requires disassembling the engine, which can be time-consuming and technically challenging for beginners. If you lack mechanical experience, you may need to pay for professional labor.

4. **Potential for Counterfeit Parts:** Purchasing from untrusted sellers increases the risk of receiving counterfeit or low-quality parts. Always buy from reputable dealers or authorized Namura distributors to avoid this issue.

5. **Mixed Reviews on Specific Models:** While Namura is generally well-regarded, some riders report inconsistencies in quality or fitment issues with certain parts. Researching user reviews specific to this wristpin bearing can help mitigate this risk.

6. **Overkill for Light Use:** If your KX60 is used infrequently or for casual riding, the benefits of a high-end bearing may not be immediately noticeable. In such cases, an OEM replacement or a lower-cost aftermarket option might suffice.

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### **Conclusion:**

The Namura Orna-RA508703-NG wristpin bearing is a strong choice for riders looking to maintain or upgrade their 1983-1984 Kawasaki KX60. Its precision engineering, durability, and potential performance benefits make it a worthwhile investment, especially if you plan to ride aggressively or want to prevent engine damage. However, the higher cost, potential installation challenges, and need for careful sourcing are factors to consider.

If you prioritize reliability and long-term engine health, this bearing is highly recommended. For casual riders or those on a tight budget, weighing the cost against the expected benefits is advisable. Always ensure you purchase from a trusted source and are prepared for the installation process.

### **Recommendation:** Purchase the Namura Orna-RA508703-NG bearing if:

- You are experiencing or suspect wristpin bearing wear in your KX60.

- You want to prevent potential engine damage and improve performance.

- You are comfortable with or can afford professional help for engine disassembly and installation.

- You trust the seller and confirm the part s authenticity before buying.

Avoid this bearing if:

- Your bike is used sporadically and you are unsure whether the bearing is truly worn.

- You cannot afford the cost or are unwilling to invest in professional installation.

- You are purchasing from an untrusted source with no return or warranty options.

For best results, pair this purchase with regular engine maintenance and monitor the bike s performance post-installation.

Details:

This is helpful if you are buying multiple items. 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. Parts without fitment are to be assumed universal and may require vehicle modification. I need to exchange an item.

Compatibility: Kawasaki KDX 50 2003 - 2006 , KX60 1983 2003 , Suzuki JR50 1978 2007 , RM60. Credit or Debit Card. 1983 1984 Kawasaki KX60 Dirt Bike Namura Wristpin Bearing: Wrist-Pin Bearing Contains: One Bearing.: Brand: Namura, model Number: ORNA-RA508703-NG.

specifications bearingmotorcycleiz:

  • for models: Kx60
  • for makes: Kawasaki
  • for years: 1983-1984
  • brand: Namura
  • mpn: Orna-ra508703-ng
  • part type: Bearing

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offer bearingmotorcycleiz:

  • started: March 20, 2026
  • quantity: 9
  • availability: In Stock
  • options: Ship-to-home
  • sold: 0

general bearingmotorcycleiz:

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

returns bearingmotorcycleiz:

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

shipping bearingmotorcycleiz:

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

seller bearingmotorcycleiz:

  • rating: 99.9%
  • # reviews: 80503
  • city: Indiana, US
for models: kx60, for makes: kawasaki, for years: 1983-1984, part type: bearing,
category: motorcycle parts > motorcycle scooter parts accessories > engines engine parts > engine bearings, sku: 11832681865902891,
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