SKU:181947
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-40011-4K Complete Top End Rebuild Kit is a comprehensive solution designed specifically for Yamaha engines requiring a 56.95mm (+1.00) bore upgrade. This kit includes all essential components needed to restore or enhance your engine's performance, ensuring a precise fit and durable operation. Crafted with high-quality materials, the NAMURA top end rebuild kit delivers reliable performance and long-lasting durability for your Yamaha motorcycle or ATV.
This kit is ideal for enthusiasts and professional mechanics seeking to upgrade or overhaul their engine's top end. The parts are engineered to meet or exceed OEM specifications, providing peace of mind during installation and operation. Whether you're rebuilding after extensive use or performing a performance upgrade, this kit offers the components necessary for a successful top end overhaul.
Designed for ease of installation, the NAMURA NX-40011-4K kit ensures compatibility with Yamaha models that require a 56.95mm bore size. The kit's comprehensive nature reduces the need for multiple purchases, streamlining the rebuild process and minimizing downtime. Trust NAMURA’s reputation for quality and precision in motorcycle engine components to keep your Yamaha running at peak performance.
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