NAMURA NA-10042-1 Piston 758891084646 0.25MM 86.73MM

( Brand: Namura ), ( Part Type: Piston ), ( Manufacturer Part Number: NA-10042-1 ), ( UPC: 758891084646 )

Review NAMURA Piston 0.25mm 86.73mm #na-10042-1 Honda fits TRX420

Introducing the Namura NA-10042-1 piston, a high-performance replacement option for Honda TRX420 ATV owners. This piston is precision engineered to deliver superior power and reliability, ensuring a smooth and enjoyable riding experience.

The NA-10042-1 piston is manufactured using top-quality materials, including a forged aluminum alloy piston body and a ring pack made from low-friction, high-durability materials. With a compression height of 35.5mm and a total length of 86.73mm, this piston is designed to optimally fit and function in the TRX420's engine.

One of the standout features of the NA-10042-1 piston is its 0.25mm piston ring gap. This fine-tuned measurement is ideal for enhancing engine efficiency and reducing power loss, providing a noticeable improvement in overall engine performance. In addition, the piston's design includes a single-piece wrist pin and a piston pin made from high-strength material, ensuring a secure and stable fit within the engine.

Another advantage of the Namura NA-10042-1 piston is its compatibility with various aftermarket performance parts. This makes it an excellent choice for those looking to boost the power output of their TRX420. The piston is also backed by Namura's commitment to quality, ensuring peace of mind for customers.

In summary, the Namura NA-10042-1 piston is a top-tier replacement option for Honda TRX420 ATV owners. Its precision engineering, high-quality materials, and fine-tuned measurements make it an excellent choice for enhancing engine performance and reliability. Whether you're a seasoned off-road rider or a weekend warrior, the Namura NA-10042-1 piston is sure to provide you with a more powerful and enjoyable riding experience.

The NAMURA NA-10042-1 piston is a common aftermarket option for the Honda TRX420 ATV. This piston comes with a 0.25mm compression ring gap and a diameter of 86.73mm. Here are some pros and cons that may help you decide if this piston is right for your ATV:

1. Improved Performance: Aftermarket pistons like the NAMURA NA-10042-1 are often designed to provide better performance than OEM (Original Equipment Manufacturer) pistons. They may offer increased power output, improved combustion efficiency, and better overall engine response.

2. Enhanced Durability: Aftermarket pistons may be made from stronger materials or have improved designs that make them more durable than OEM pistons. This can help extend the life of your engine and reduce the need for frequent replacements.

3. Customization: Aftermarket pistons offer the opportunity to customize your engine to suit your specific riding style or application. For example, you may choose a piston with a different compression ratio or ring gap to optimize engine performance for your specific riding conditions.

1. Cost: Aftermarket pistons can be more expensive than OEM pistons. While the performance and durability benefits may be worth the extra cost for some riders, others may prefer to stick with the OEM option to save money.

2. Installation Complexity: Installing an aftermarket piston can be a more complex process than installing an OEM piston. It may require specialized tools and skills, and there is a risk of damaging the engine if not done correctly.

3. Warranty: Using an aftermarket piston may void the manufacturer's warranty on your ATV. This is something to consider before making the purchase.

In conclusion, the NAMURA NA-10042-1 piston can offer improved performance and durability for your Honda TRX420 ATV. However, it comes with a higher cost, installation complexity, and potential warranty issues. Ultimately, whether or not this piston is right for you depends on your specific riding needs, budget, and technical abilities. If you are comfortable with the installation process and are looking for increased performance and longevity, then the NAMURA NA-10042-1 piston may be a good choice for you. Otherwise, you may prefer to stick with the OEM option to save money and maintain your warranty.

part # na100421 prices

• $66.74-$90.95

specifications atvsienna:

• for models: Trx420
• for makes: Honda
• brand: Namura
• part type: Piston
• manufacturer part number: NA-10042-1
• upc: 758891084646

returns atvsienna:

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

seller atvsienna:

• rating: 99.7%
• # reviews: 666944

payments atvsienna:

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

general atvsienna:

• ATV, Side-by-Side UTV Parts Accessories > Engines Engine Parts > Other Engine Parts
• condition: New

offer atvsienna:

• quantity: 3
• started: January 11, 2026
• sold: 0
• options: Ship-to-home
• availability: In Stock

shipping atvsienna:

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

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