PISTON KIT 05-18 YZ125 54.00 B, NAMURA NX-40009-B YAMAHA
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Namura piston kit for Yamaha YZ125 models 2005-2019. Features a 54mm bore with part number NX-40009-B. This high-performance piston assembly is engineered in the USA and manufactured in Taiwan. Constructed from high-silicon content Hypereutectic cast aluminum for reduced heat expansion, tighter clearances, increased hardness, longer life, and reduced scuffing. Machined, smooth piston crowns minimize carbon buildup, enhance horsepower, and improve fuel economy. Hard anodized crowns offer 75% greater strength and minimal expansion, reducing the risk of cold seizures. Teflon/Molybdenum coated skirts (MOS2) reduce friction and heat for increased power and longevity. Namura rings match OEM design. Includes fractional oversize piston (B .0004 in.). Cross-reference numbers: 1C3-11631-03-D0, 1C3-11631-03-C0, 1C3-11631-03-A0, 1C3-11631-03-B0, 5NY-11611-00-00, 1C3-11633-00-00, 93450-16068-00, Wossner 8160DA, NX-40009. Part No. 56-W845.B.NT.
- SKU
- 56-W845.B.NT
- Brand
- Namura Technologies
- Availability
- In Stock (9)
Fitments (24)
| Make | Model | Year |
|---|---|---|
| FANTIC | XE 125 | 2021 |
| FANTIC | XE 125 | 2022 |
| FANTIC | XX 125 | 2021 |
| YAMAHA | YZ 125 | 2004 |
| YAMAHA | YZ 125 | 2005 |
| YAMAHA | YZ 125 | 2006 |
| YAMAHA | YZ 125 | 2007 |
| YAMAHA | YZ 125 | 2008 |
| YAMAHA | YZ 125 | 2009 |
| YAMAHA | YZ 125 | 2010 |
| YAMAHA | YZ 125 | 2011 |
| YAMAHA | YZ 125 | 2012 |
| YAMAHA | YZ 125 | 2013 |
| YAMAHA | YZ 125 | 2014 |
| YAMAHA | YZ 125 | 2015 |
| YAMAHA | YZ 125 | 2016 |
| YAMAHA | YZ 125 | 2017 |
| YAMAHA | YZ 125 | 2018 |
| YAMAHA | YZ 125 | 2019 |
| YAMAHA | YZ 125 | 2020 |
| YAMAHA | YZ 125 | 2021 |
| YAMAHA | YZ 125X | 2020 |
| YAMAHA | YZ 125X | 2021 |
| YAMAHA | YZ 125X | 2022 |
- General Product Group
- Engine
- General Product Type
- Pistons & Kits
- General Size
- 54.00mm
- Variant Id
- 258016
FULL DESCRIPTION
Namura Piston Kit B - 54mm Bore
This high-performance Namura Piston Kit features a 54mm bore and is engineered in the USA, manufactured in Taiwan. It is designed to enhance the performance and longevity of your engine.
- Material: Constructed from high-silicon content Hypereutectic cast aluminum for reduced heat expansion, tighter clearances, increased hardness, longer life, and reduced scuffing.
- Piston Crown: Machined, smooth piston crowns reduce carbon buildup, increasing horsepower and fuel economy. Hard anodized crowns offer 75% more strength than non-anodized versions, minimizing expansion and the risk of cold seizures.
- Piston Skirts: MOS2 (Teflon/Molybdenum) coated skirts ensure superior performance by reducing friction and heat, contributing to added power and longevity.
- Piston Rings: Namura rings are designed to match OEM specifications.
- Oversize Options: Fractional oversize pistons are available for select applications to extend engine life.
This piston kit is identified by part number NX-40009-B.
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Check the fitment table on this page against your make, model and year. Not sure? Call or email us and we will check it for you before you order.
Yes. We ship from the UK. Orders ship within 3 working days, then delivery to the United States takes 5–8 business days. The delivery price is shown at checkout before you pay. Delivery details
Yes. You have 14 days from delivery to return it, unused and in its original packaging. Contact us first and we will send you the return instructions. Returns policy
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