NAMURA TECHNOLOGIES FX-40037-BBB Standard Piston Kit 76.97MM 77MM

( Brand: Namura Technologies ), ( Manufacturer Part Number: FX-40037-BBB ), ( Part Type: Piston )

Review NAMURA TECHNOLOGIES Standard Bore Piston Kit Size 76.97mm For Yamaha 77mm fits WR250F 2015–2019

The Namura FX-40037-BBB Standard Piston is a high-performance replacement piston specifically designed for the Yamaha WR250F motorcycles manufactured between 2015 and 2019. This piston is engineered to fit perfectly and functionally replace the OEM piston, ensuring optimal engine performance.

This piston measures 76.97mm in diameter, making it a direct fit for the 77mm kit on the Yamaha WR250F. It is manufactured using advanced techniques and high-quality materials, ensuring superior durability and reliability. The piston skirt is designed to minimize friction and improve power delivery, while the piston crown is optimized for better combustion efficiency and increased power output.

The Namura FX-40037-BBB Standard Piston is precision-machined to ensure a perfect fit and finish. It is designed to work seamlessly with the stock engine components, making installation easy and straightforward. The piston ring gaps are also pre-set to factory specifications, eliminating the need for additional adjustments.

The piston features a state-of-the-art coating that provides superior heat resistance and reduces the risk of scuffing and scoring. This coating also helps to reduce friction, resulting in improved engine performance and longer piston life.

In summary, the Namura FX-40037-BBB Standard Piston is a high-quality replacement piston designed specifically for the Yamaha WR250F motorcycles from 2015 to 2019. It offers improved durability, reliability, and power output, making it an excellent choice for riders looking to enhance the performance of their bike. With its precision machining, optimized design, and advanced coating technology, this piston is sure to provide superior performance and long-lasting reliability.

The Namura FX-40137-BBB standard piston kit for the Yamaha WR250F (2015-2019) with a bore size of 76.97mm is a popular aftermarket option for upgrading the stock piston. Here are some potential pros and cons of purchasing this kit:

1. Increased power: The aftermarket piston kit can provide an increase in power and torque, leading to better performance.

2. Enhanced durability: The high-quality materials used in the piston kit can help improve the engine's durability and longevity.

3. Customization: Upgrading to a larger piston size allows riders to tailor the engine to their riding style and preferences.

1. Cost: Aftermarket piston kits can be more expensive than stock parts, making them a significant investment for some riders.

2. Installation complexity: Installing a piston kit requires a certain level of mechanical expertise and the use of specialized tools, which can add to the cost and time involved.

3. Potential powerband shift: Increasing the bore size can result in a powerband shift, which may require adjustments to the fuel mapping or other modifications to optimize performance.

The Namura FX-40137-BBB standard piston kit for the Yamaha WR250F (2015-2019) offers several potential benefits, including increased power, enhanced durability, and customization options. However, the higher cost, installation complexity, and potential powerband shifts are important considerations. Ultimately, the decision to purchase this kit depends on the rider's goals, budget, and mechanical skills.

If you are a serious off-road rider or racer seeking improved performance and durability, the Namura FX-40137-BBB standard piston kit for the Yamaha WR250F (2015-2019) could be a worthwhile investment. However, if you are a casual rider or have limited mechanical expertise, you may want to consider other upgrades or wait until you have more experience and resources before undertaking a piston kit installation. Additionally, ensure that you source the kit from a reputable dealer and follow proper installation procedures to minimize any potential risks or complications.

Details:

Compatible with Yamaha model's below: 2015 WR250F. Namura FORGED Series piston. Manufactured by Namura. Made in Taiwan.

All Namura Forged pistons come with Namura signature features: 100% CNC-machine piston domes, hard anodized domes for reduced carbon build-up and heat resistance M0S2 coated skirts excellent break-in protection properties. Size B piston is 76.97mm. Kit is for standard bore size - 77.00mm. Kit Includes piston, rings, pin clips you get exactly what is pictured.

Namura exclusive forged alloy used offers lower expansion rates, allowing for tighter build tolerances and superior tensile strength at operating temperatures.

part #: fx40037 prices

• $109.20-$136.11

specifications pistondon:

• for models: Wr250f
• for makes: Yamaha
• for years: 2015-2019
• brand: Namura Technologies
• mpn: Fx-40037-bbb
• part type: Piston

general pistondon:

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

shipping pistondon:

• service: Standard
• transit: 4-7 Days
• class: Standard
• type: Fixed
• cost: $0.00

returns pistondon:

• time: 60 Days
• paid by: Buyer
• policy: Returns Accepted

seller pistondon:

• # reviews: 386595
• city: Suamico, Wisconsin
• rating: 99.5%

payments pistondon:

• wallet: Paypal
• other
• credit card: Visa

offer pistondon:

• started: April 25, 2025
• quantity: 1
• options: Ship-to-home
• availability: In Stock
• sold: 0

Namura Technologies FX-40037 Is Similar To:

• Namura Technologies Nx-40080-4os 040 Over Bore Piston Kit For Yamaha 1993-2001 Yz80 48mm (66% similar) Manufactured by Namura. Made in Taiwan. Kit is for .040 over bore size - 48.00MM. Compression ratio of 8.2:1. Piston dome is anodized for superior heat resistance and longer lifespan. Piston is 47.95MM. Compatible with yamaha model's below: 1993 YZ80. Kit includes piston, rings, pin...(August 11th, 2024)
• Namura Technologies Nx-30000-c Piston Kit Standard Bore 53.96mm (51.8% similar) Bore: 53.96MM, sizing: standard bore, MOS2 made with Teflon /molybdenum coated skirts - a rolled on application process provides a fits bond...(August 12th, 2024)
• Namura Technologies Nx-30004 Size A 53.94mm Piston Kit For Suzuki 2001-2003 Rm125 Standard Bore 54mm (42% similar) Benefits include increased heat transfer, reduced friction and helping to eliminate cold seizures. Some tests have shown this feature can increase horsepower and fuel economy by up to 6%. Machined smooth heads - reflects combustion heat and reduces carbon buildup, protecting the top of piston...(August 12th, 2024)
• Namura Technologies Nx-30025-b Piston Kit Standard Bore 66.95mm (54.1% similar) Anodized domes - increases heat resistance and durability; pistons with anodized domes are 75% stronger than non-anodized. Machined smooth heads...(August 13th, 2024)
• Namura Technologies Fx-40049-c (41.5% similar) Benefits include increased heat transfer, reduced friction and helping to eliminate cold seizures. Machined smooth heads - reflects combustion heat and reduces carbon buildup, protecting the top of piston. Anodized domes - increases heat resistance and durability; pistons with anodized domes are...(August 13th, 2024)
• Namura Technologies Nx-10080-2r Nx 10080 2 Pistons All Have Molybdenium Skirt (45.1% similar) For kits, photo might show entire kit and listing is only for one component. All Namura pistons have super-high,:: Namura pistons. Note: photos do not always represent the actual product. All Namura pistons have anodized domes that provide superior heat resistance...(August 13th, 2024)
• Namura Orna-ra418207-gs 2004 Honda Cr125 Dirt Bike Piston Rings 53.95mm (39.8% similar) I need to exchange an item. Parts without fitment are to be assumed universal and may require vehicle modification. 2004 Honda CR125 dirt bike Namura piston rings 53.95MM: ring set contains: ring to match a single piston.: brand: Namura, model number: ORAN-RA418207-GS...(August 13th, 2024)
• Namura Nx-10051-2k Top End Repair Kit 0.50mm 39.5mm 10.0 1 Honda Z50r crf50f xr50r (38.5% similar) Everything for a top end rebuild in one box. Comes with enough components to service one engine. Namura top end repair kit 0.50MM 39.5MM 10.0:1 Honda Z50R/CRF50F/XR50R: top-end repair kit can help improve the performance of your ride and keeping it running in peak condition...(August 14th, 2024)
• Namura Orna-ra418127-gs 2001-2002 Kawasaki Kx125 Dirt Bike Piston Rings 53.94mm (35.9% similar) Compatibility: Husqvarna Cr 125 1998 - 2010 , 2012 2013 , wr 2007 , 2009 Honda CR125R 2004 2007 , Kawasaki KX125 2005 , Suzuki RM125 1989 yamaha YZ125 2014 .: brand: Namura, model number: ORAN-RA418127-GS. Parts without fitment are to be assumed universal and may require vehicle...(August 14th, 2024)
• Namura Technologies Nx-30016-b Piston Kit For Engine Pistons Kits Aw (52% similar) Namura NC-30016-B piston kit for engine pistons kits aw: status: in stock...(August 15th, 2024)
• Namura Technologies Nx-20013-b Piston Kit Standard Bore 48.46mm (52.9% similar) Bore: 48.46MM, sizing: standard bore, MOS2 made with Teflon /molybdenum coated skirts - a rolled on application process provides a fits bond that is 10 times stronger than other spray coatings. Actual product may differ from the item shown in photograph. Benefits include increased heat...(August 15th, 2024)