HONDA MOTORCYCLE 87121-HN1-U50ZA Fenders

( Brand: Honda Motorcycle ), ( Manufacturer Part Number: 87121-HN1-U50ZA ), ( Type: Parts )

Review HONDA MOTORCYCLE New Oem fits TRX400EX 2006

The **Honda TRX400EX (Part Number: 87121-HN1-U50ZA, Model Year: 2006)** is a rugged, off-road powerhouse designed for adventurers who demand reliability, versatility, and performance in the toughest terrains. Built upon Honda s legendary reputation for durability and innovation, this four-wheeled utility vehicle combines the compact yet powerful 399cc, single-cylinder, liquid-cooled engine with a smooth, low-maintenance operation that delivers consistent power across a wide RPM range. The engine is paired with a robust, manual transmission featuring five forward gears and one reverse, allowing for precise control whether navigating steep inclines, rocky trails, or deep mud. With a top speed of around 50 mph and a torque-rich performance, the TRX400EX excels in both utility and recreational use, making it an ideal companion for farming, construction support, off-grid living, or exhilarating off-road excursions.

Mechanically, the TRX400EX is engineered for off-road resilience with a solid-axle front and rear suspension system, featuring heavy-duty coil springs and hydraulic shock absorbers that absorb impacts while maintaining stability. The independent front suspension, combined with a solid rear axle, provides a balanced ride that absorbs bumps and uneven terrain without sacrificing handling agility. The vehicle s ground clearance is optimized for traversing obstacles, and its low center of gravity enhances maneuverability, making it easier to navigate tight spaces or challenging off-road conditions. The TRX400EX also features a durable, high-capacity fuel tank with a range of approximately 2.5 hours of continuous operation, ensuring extended runtime for extended work or adventure sessions.

Designed with practicality in mind, the TRX400EX boasts a spacious cargo area with a removable seat, allowing for the transport of tools, supplies, or passengers when needed. The open-air cabin provides excellent ventilation and visibility, while the ergonomic controls including a tiller-style steering system offer intuitive handling. The vehicle s compact dimensions, measuring approximately 76 inches in length, 42 inches in width, and 40 inches in height, make it highly maneuverable in tight spaces, yet its robust build ensures it can handle heavy loads with ease. The TRX400EX is also equipped with a reliable electrical system, including a 12-volt battery and a robust lighting setup, ensuring visibility and functionality during low-light conditions.

Safety and durability are prioritized in the TRX400EX s construction, with a high-strength steel frame and reinforced components that withstand the rigors of off-road use. The vehicle s tires typically 20-inch front and 18-inch rear are designed for traction on various surfaces, from dirt and gravel to light snow or sand. Optional accessories, such as winches, roof racks, or auxiliary lights, can further enhance its functionality, making it a versatile tool for both work and play. Whether used for utility tasks, recreational off-roading, or as a reliable sidekick for outdoor enthusiasts, the 2006 Honda TRX400EX stands as a testament to Honda s commitment to crafting vehicles that are as dependable as they are capable. Its blend of simplicity, power, and adaptability ensures it remains a favorite among those who seek a no-nonsense, high-performance off-road companion.

### **Pros and Cons of Buying a 2006 Honda TRX400EX (Part Number: 87121-HN1-U50ZA)**

#### **Pros**

1. **Reliability and Durability** Honda s TRX400EX is known for its robust build, particularly the 400cc V-twin engine, which is designed to handle rough terrain and heavy use. Many owners report long-term reliability with proper maintenance.

2. **Off-Road Capability** The TRX400EX is a true off-road machine, featuring a high ground clearance, long-travel suspension, and a durable frame. It excels in trails, rocks, and mud, making it ideal for adventurous riders.

3. **Proven Engine** The 399cc liquid-cooled V-twin engine is well-regarded for its smooth power delivery and durability. It s less prone to catastrophic failure compared to some competitors, especially when maintained.

4. **Resale Value** Honda s reputation for longevity means the TRX400EX holds its value better than many other ATVs. If you plan to sell later, you ll likely get a decent return.

5. **Ease of Maintenance** Honda parts are widely available, and the bike is relatively straightforward to service compared to some Japanese or Chinese alternatives. Many mechanics are familiar with Honda ATVs.

6. **Comfortable for Long Rides** The ergonomics are well-designed for extended off-road use, with a comfortable seat and good handlebar positioning.

7. **Four-Wheel Drive (4WD) and Low Range** The TRX400EX comes with a full 4WD system and a low-range gear, making it capable of tackling steep climbs and deep mud without straining the engine.

8. **Aftermarket Support** There is a strong aftermarket community for Honda ATVs, offering upgrades like exhausts, suspension kits, and performance parts to enhance performance or comfort.

#### **Cons**

1. **Age and Mileage Concerns** A 2006 model is now over 15 years old, meaning it may have accumulated significant wear, especially if it hasn t been well-maintained. Rust, worn suspension, and aging belts/hoses are common issues in older ATVs.

2. **Potential Rust Issues** If the bike was stored in wet or corrosive environments, rust can weaken critical components like the frame, exhaust, and suspension. A thorough inspection is essential.

3. **Fuel System Problems** Older Honda ATVs can develop fuel system issues, such as clogged injectors, a failing fuel pump, or carburetor problems (if equipped). Ethanol-blended fuel can also accelerate wear in older engines.

4. **Suspension Wear** After years of off-road use, the shocks and springs may be shot, leading to a harsh ride or poor handling. Replacing suspension components can be costly.

5. **Electrical Gremlins** Older ATVs often suffer from failing wiring, faulty switches, or a worn-out battery. The electrical system may require attention if not already addressed.

6. **Limited Modern Features** Compared to newer ATVs, the 2006 TRX400EX lacks modern conveniences like digital dashboards, traction control, or advanced suspension systems. It s a no-frills, utilitarian machine.

7. **Parts Availability** While Honda parts are still available, some specialized components (like OEM suspension or exhaust) may be harder to find than on newer models. Used parts may be necessary, which can be unreliable.

8. **Potential Hidden Damage** Without a thorough inspection, issues like frame cracks, seized bearings, or internal engine wear could go unnoticed until they become expensive problems.

9. **Noise and Vibration** The V-twin engine can be loud and vibrates noticeably, which may be uncomfortable for some riders over long periods.

10. **Fuel Efficiency** Like most ATVs, the TRX400EX is not fuel-efficient, and older engines may consume even more gas than newer models.

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### **Conclusion**

The **2006 Honda TRX400EX** is a capable, durable off-road ATV that remains a solid choice for riders who prioritize reliability, raw capability, and Honda s reputation for longevity. However, its age means it requires careful evaluation before purchase. If you find a well-maintained example with a clean service history, it can be an excellent bargain especially if you re looking for a no-nonsense work or trail machine.

That said, if you re open to newer models, a **2010 or later TRX400EX** (or even a **2008 model**) would offer better suspension, fuel injection, and modern refinements while still retaining the core strengths of the original. If you re set on this specific year, **insist on a pre-purchase inspection** to check for rust, suspension health, and engine condition.

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### **Recommendation**

- You find a **low-mileage example (under 1,500 hours)** with a **verified service history**.

- The seller provides **proof of recent maintenance** (oil changes, belt replacements, suspension checks).

- You re willing to **budget for potential upgrades** (suspension, exhaust, or electrical fixes).

- You prioritize **raw off-road capability and Honda reliability** over modern features.

- The bike has **visible rust, leaks, or signs of neglect**.

- The seller refuses to provide **service records or a pre-purchase inspection**.

- The price is **significantly above market value** (indicating hidden issues).

- You re not prepared for **potential repair costs** (especially suspension, fuel system, or electrical work).

If you re unsure about the 2006 model, consider a **2008-2012 TRX400EX** (which still uses the same engine but with slight refinements) or a **used but well-maintained 2015 model** for better suspension and fuel injection. However, the 2006 remains a fantastic value if you re confident in its condition.

**Final Verdict:** A **well-maintained 2006 TRX400EX can be an outstanding purchase** for the right buyer just approach it with caution and due diligence.

Details:

Buyer should verify this is the exact part needed before purchasing.

part #: 87121hn1u50za prices

• $11.31-$26.44

specifications atvfendersgo:

• for models: Trx400ex
• for makes: Honda
• for years: 2006
• brand: Honda Motorcycle
• mpn: 87121-hn1-u50za
• type: Parts

seller atvfendersgo:

• rating: 99.7%
• city: Columbus, Wisconsin
• # reviews: 14443

offer atvfendersgo:

• availability: In Stock
• best offers: True
• started: March 8, 2026
• options: Ship-to-home
• sold: 0

payments atvfendersgo:

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

general atvfendersgo:

• condition: New
• Body Frame > Body Parts, doors Fenders > Fenders

returns atvfendersgo:

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

shipping atvfendersgo:

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

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