PRO-X 21.1003 Piston Pin Bearing End Atv Utv NH80 Atv/utv Bike 1985 1984

( Brand: Pro-x ), ( Manufacturer Part Number: 21.1003 ), ( Model: NH80-AERO ), ( Part Type: Bearing Piston Pin ), ( Make: Honda ), ( Year: 1985, 1984, 1983 )

Review PRO X Piston Pin Bearing Small End Motorcycle Atv/utv Bike Dirt fits STREET 1983

The **PRO-X 21.1003 Piston Pin Bearing End** is a high-performance, precision-engineered component designed specifically for demanding applications in all-terrain vehicles (ATVs), utility terrain vehicles (UTVs), and street bikes, ensuring optimal power transfer, reduced friction, and extended engine longevity. Crafted from a proprietary blend of high-grade steel and advanced bearing materials, this bearing end is engineered to withstand the extreme stresses of high-speed operation, heavy loads, and harsh off-road conditions, making it an ideal upgrade for performance enthusiasts and mechanics seeking reliability. The bearing features a robust, interference-fit design that securely locks into place, preventing axial movement and minimizing wear on the connecting rod and piston pin, thereby enhancing overall engine efficiency. Its seamless construction eliminates the need for additional lubrication points, reducing maintenance hassles while maintaining smooth operation under extreme temperatures and vibrations. Whether installed in a stock engine or a heavily modified setup, the PRO-X 21.1003 delivers superior durability and performance, helping to maintain peak engine health and power output in both street and off-road scenarios. Built to meet or exceed OEM specifications, this bearing end is a trusted choice for riders who demand precision, strength, and long-lasting performance in their vehicles.

The **Pro-X 21.1003 Piston Pin Bearing** is designed for ATVs, UTVs, and street bikes, particularly those with a 21mm piston pin. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

1. **High-Quality Material:** Made from premium bearing steel, this part is designed to withstand high stress and friction, reducing wear and extending engine life.

2. **Durability:** The hardened steel construction ensures long-lasting performance, even under heavy loads or rough terrain conditions.

3. **Precision Fit:** Engineered to match common engine specifications, it minimizes clearance issues that could lead to premature failure.

4. **Compatibility:** Suitable for a wide range of ATVs, UTVs, and street bikes, including popular models like Honda, Kawasaki, and Suzuki, depending on the engine configuration.

5. **Easy Installation:** Designed for straightforward replacement, reducing labor time and potential engine damage during swaps.

6. **Cost-Effective:** Compared to full engine rebuilds or replacements, replacing just the piston pin bearing is a budget-friendly solution for common wear issues.

7. **Reduces Noise and Vibration:** A properly fitted bearing helps maintain smooth piston movement, reducing engine noise and unnecessary vibrations.

8. **Aftermarket Reliability:** Pro-X is a well-known brand in the performance and replacement parts industry, offering consistent quality and support.

1. **Limited Brand-Specific Models:** While versatile, it may not fit every exact engine variant, requiring verification of the model s specifications before purchase.

2. **Potential for Misalignment:** If not installed correctly, improper seating can lead to binding or excessive wear, negating the bearing s benefits.

3. **No Warranty on All Models:** Some aftermarket parts lack manufacturer warranties, so users must rely on the seller s return policy if issues arise.

4. **Requires Disassembly:** Replacing the bearing often necessitates partial engine disassembly, which may not be ideal for inexperienced mechanics.

5. **Price Sensitivity:** While affordable compared to OEM parts, some users may find it slightly more expensive than generic alternatives, though quality justifies the cost.

6. **Availability Issues:** Depending on the region, stock may be limited, requiring advance ordering or purchasing from specialty suppliers.

The **Pro-X 21.1003 Piston Pin Bearing** is a solid choice for those seeking a reliable, high-performance replacement for their ATV, UTV, or street bike. Its durability, precision engineering, and compatibility with many engines make it a practical upgrade for reducing wear and improving engine longevity. However, users must ensure proper fitment for their specific model and handle installation carefully to avoid complications. For most riders, the benefits outweigh the drawbacks, making it a recommended part for maintenance or performance upgrades.

If you re experiencing piston pin wear, excessive noise, or reduced engine efficiency in a compatible vehicle, the **Pro-X 21.1003 Piston Pin Bearing** is a strong recommendation. Verify your engine s specifications (especially piston pin diameter and crankshaft configuration) before purchasing to ensure compatibility. For best results, have a mechanic perform the installation if you lack experience with engine disassembly. Pair this replacement with fresh oil and filters to maximize its effectiveness. Overall, it s a cost-effective solution for extending your engine s life and maintaining peak performance.

Details:

Pro-X, Piston Pin Bearing - Small End, This item fits the following model's: Honda NH80 Aero 1985, Honda 1984, 1983. Any damage claims may be exchanged for the identical item only. Piston Pin Bearing by Pro-X. Sold as: Each.

part #: 211003 prices

• $11.10-$90.07

specifications bearingmotorcycleiz:

• for models: Street
• brand: Pro-x
• mpn: 21.1003
• model: Nh80-aero
• part type: Bearing Piston Pin
• make: Honda
• year: 1985, 1984, 1983

returns bearingmotorcycleiz:

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

payments bearingmotorcycleiz:

• wallet: Paypal
• credit card: Diners-club
• other

offer bearingmotorcycleiz:

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

shipping bearingmotorcycleiz:

• cost: $0.00
• transit: 4-10 Days
• class: Economy, Standard, Expedited
• type: Fixed
• service: Economy, Standard, Expedited

seller bearingmotorcycleiz:

• city: Loudon, Tennessee
• rating: 99.6%
• # reviews: 642471

general bearingmotorcycleiz:

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

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