Namura® NA-40000-2R - Piston Ring Set

4 reviews|Item # mpn4620403238
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    Notes:
    • This is a Race Only product that is to be used solely for competition. It cannot be used on vehicles that are operated on public streets, roads or highways. Its use is limited to closed-course and open-course racing that is formally sanctioned by a recognized racing organization. Any other use, including recreational off-road use, could be in violation of local, state and federal laws. Shipping Restriction: CA, NY, ME.
    Authorized Dealer
    $14.25
    In Stock (32)
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    Vehicle Fitment

    Yamaha

    Features

    • Namura rings replace the ones included with Namura piston assemblies
    • They also match the OEM design for use on the original pistons unless noted
    • Rings are sold in a set for one piston
    • Carefully developed for the highest level of quality
    • Unsurpassed in functionality and reliability
    • Ready to serve reliably for years to come

    Product Details

    Piston Ring Set (NA-40000-2R) by Namura®. Quality materials mean increased longevity and continued performance. A critical aspect of any rebuild, gaskets are often given little thought. However, the right materials can make all the difference.

    Installation

    Namura® - Piston Ring Set Installation Instruction

    Often overlooked and unglamorous, they are an essential part of piston performance, engine efficiency, and durability. The materials used in the manufacturing of piston rings are one of the most critical factors in their performance. Namura’s rings are designed specifically for their application. The type of cylinder sleeve, sleeve coating, size of the engine, and the stroke (2 or 4) all play a role in determining the composition best suited for the operating environment. While it may vary by model, Namura have outlined some of the key features below:

    Compression Rings
    Composed of either a highly ductile cast iron or stainless steel alloy; both materials possess excellent wear resistance and provide a gastight seal. Chrome, phosphate and nitride coatings are also used to meet the demands of the application.

    Oil Rings
    Oil rings consist of three separate components. Two scraper rails constructed from highly ductile cast iron or a stainless steel alloy and also have a chrome, nitride, or phosphate coating. The single expansion ring is manufactured from stainless steel.

    Namura® - Piston Ring Set ApplicationsNamura® - Piston Ring Set Installation InstructionNamura® - CatalogNamura® - InformationNamura Authorized DealerProduct linesFAQAbout us
    Brand:
    Namura
    Part Number:
    NA-40000-2R
    Alternate MPN:
    NA400002R

    Reviews

    (4)
    Only authorized customers can leave a review on our website. We would love to know what you like or dislike about the product. Share your opinion on product quality, appearance, installation, and other characteristics.
    /5
    1-4 of 4 Reviews
    5 of 5
    Top End Kit
    Fast delivery, great price, everything I needed.
    Namura® NA-20000-6K - Top-End Repair Kit
    Posted by William (Fisher, AR) / May 12, 20252000 Kawasaki KVF300 Prairie
    5 of 5
    Suzuki Front End Kit
    Always good service. Came right on time. Just what I need to repair my bike.
    Namura® NX-30085K - Top-End Repair Kit
    Posted by Patricia (Alverado, TX) / July 28, 20202002 Suzuki RM85
    1 of 5
    Only One Piston!!!
    Purchased this top end rebuild kit for a Polaris Scrambler 850 and it only came with one piston! How is Namura going to sell a top end kit with all the gaskets and only include one piston!!!! POWERSPORTSiD was very helpful with the return and very professional also.
    Namura® - Top-End Repair Kit
    Posted by Customer / May 23, 20202019 Polaris Scrambler 850
    4 of 5
    Great Product and Service!
    The kit was exactly as described. The kit fit as it should have. Very happy with this product. Purchasing from pPOWERSPORTSiD was easy and shipping was very fast. Thank you so much!
    Namura® NA-11000K - Top-End Repair Kit
    Posted by Jill (Acacia Gardens, NS) / December 14, 2019

    Questions and Answers

    (0)
    If you have any questions about this product, please don't hesitate to ask us. We will be happy to help you!