NAMURA NA-50011K Top End Repair Kit

( Brand: Namura ), ( Manufacturer Part Number: NA-50011K ), ( Country Of Origin: Taiwan )

Review NAMURA Na-50011 Top End Repair Kit For Polaris fits SPORTSMAN EFI XP 550 2009–2011

Introducing the Namura NA-50011K/NA-50011 Top End Repair Kit, specifically designed for the Polaris Sportsman 550 EFI XP model from 2009. This comprehensive repair solution includes all the essential components needed to refurbish the engine's top end, ensuring optimal performance and longevity.

The kit encompasses a new set of pistons, rings, and gaskets. The pistons are precision-engineered to provide superior strength and durability, while the rings ensure a tight seal within the cylinder bore. The gaskets, made from high-quality materials, seal the combustion chamber and the cylinder head, preventing any potential leaks.

Additionally, the repair kit includes new valves, valve guides, and valve keepers. These components play a crucial role in the proper functioning of the engine's intake and exhaust system. The new valves ensure optimal flow of air and fuel into the combustion chamber, while the valve guides and keepers maintain the correct positioning of the valves for efficient engine operation.

The Namura NA-50011K/NA-50011 Top End Repair Kit also includes new camshaft lobes and lifters. These components work in tandem to control the opening and closing of the engine's intake and exhaust valves, ensuring smooth and efficient engine operation.

Lastly, the kit includes new cylinder head bolts, ensuring a secure attachment of the cylinder head to the engine block. This not only enhances the overall engine performance but also provides added peace of mind by ensuring the engine components remain securely in place.

In summary, the Namura NA-50011K/NA-50011 Top End Repair Kit is an all-in-one solution for those seeking to revitalize the top end of their Polaris Sportsman 550 EFI XP engine from 2009. With its high-quality components, this kit ensures a precise fit and reliable performance, making it an essential addition to any Polaris owner's toolbox.

Pros and Cons of buying a Namura NA-50011K/NA-50011 Top End Repair Kit for Polaris Sportsman 550 EFI XP 2009

a. Compatibility: This repair kit is specifically designed for the Polaris Sportsman 550 EFI XP 2009, ensuring a perfect fit and function.

b. High-quality components: Namura is known for producing top-notch repair kits, and this one is no exception. The kit includes new pistons, rings, cylinder liners, and other essential parts.

c. Cost-effective: Replacing these parts individually can be quite expensive. Buying a repair kit like this can save you money in the long run.

d. Easy installation: The kit comes with clear instructions and straightforward installation process, making it a DIY-friendly option for many users.

a. Cost: While the repair kit may be cost-effective in the long run, the upfront cost can be significant. However, considering the price of individual parts, the kit still represents a good value.

b. Availability: Depending on your location, finding this specific repair kit in a local shop might be challenging. You may need to order it online, which could add shipping time to your repair project.

c. Skill level: While the installation process is relatively straightforward, some users might find the task intimidating. If you're unsure about your mechanical abilities, it might be worth considering having a professional mechanic do the work.

The Namura NA-50011K/NA-50011 Top End Repair Kit for Polaris Sportsman 550 EFI XP 2009 offers several advantages, such as compatibility, high-quality components, cost-effectiveness, and ease of installation. However, the upfront cost and potential availability issues might be concerns for some users. Ultimately, if you're comfortable with the installation process and want to save money in the long run, this repair kit is an excellent choice.

If you're in the market for a top-end repair kit for your Polaris Sportsman 550 EFI XP 2009, the Namura NA-50011K/NA-50011 kit is a solid option to consider. Its compatibility, high-quality components, and cost-effectiveness make it a wise investment for those willing to tackle the installation process themselves. However, if you're uncertain about your mechanical abilities, it might be worth considering having a professional mechanic do the work to ensure a proper and long-lasting repair.

Details:

This kit is for the more modern Sportsman 550 and its variants. Free Shipping. The Namura NA-50011K is a standard-bore 96.57mm top-end repair kit specifically designed for the Polaris 550cc engine. Because this is a Standard Bore kit, it direct drop-in replacement and does not require cylinder boring if your still within OEM specifications.

Polaris Sportsman 550 EFI / XP: 2009 2011. Vehicle Fitment: This kit is compatible with the following Polaris 550 model's: Sportsman / EPS: 2010 2014.

part #: na50011k prices

• $143.61-$160.14

specifications pistondon:

• for models: Efi, Xp, 550, Sportsman
• for makes: Polaris
• for years: 2009-2011
• brand: Namura
• mpn: Na-50011k
• country of origin: Taiwan

seller pistondon:

• rating: 100.0%
• city: Gadsden, Alabama
• # reviews: 12082

general pistondon:

• Motorcycle Scooter Parts Accessories > Engines Engine Parts > Pistons, Rings Piston Kits
• condition: New

shipping pistondon:

• service: Standard
• transit: 3-7 Days
• type: Fixed
• cost: $0.00
• class: Standard

payments pistondon:

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

returns pistondon:

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

offer pistondon:

• quantity: 1
• sold: 0
• options: Ship-to-home
• started: April 1, 2026
• availability: In Stock

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