SKU:181942
Top End kit includes: piston, rings, wrist pin, clips, top end bearing, and gasket kit
MOS2 (Teflon/Molybdenum) Coated Skirts A rolled on application process provides a bond that is 10 times stronger than other spray on coatings. 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 the piston. Some tests have shown this feature can increase horsepower and fuel economy by up to 6%
Anodized Domes Increases heat resistance and durability; pistons with anodized domes are 75% stronger than non-anodized pistons
Hypereutectic Casting Process Provides higher silicon content for reduced expansion rates and additional wear resistance; it also has an ability to withstand higher cylinder temperatures
The NAMURA NX-40011-2K Complete Top End Rebuild Kit is designed to restore and enhance the performance of Yamaha engines with a bore size of +0.50 (56.48mm). This comprehensive kit includes all necessary components for a thorough top-end overhaul, ensuring optimal engine operation and longevity. Crafted with precision and high-quality materials, the kit provides a reliable solution for maintaining or upgrading Yamaha engine performance. Whether you're rebuilding after wear or seeking a performance boost, this kit offers a straightforward and effective upgrade path.
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