NA-40005K Top End Kit 82.95/Std 11:1 Yam
NA-40005K Top End Kit 82.95/Std 11:1 Yam
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NA-40005K Top End Kit 82.95/Std 11:1 Yam
Upgrade your engine's performance and reliability with the NA-40005K Top End Kit. This comprehensive kit is designed for those who demand the best from their Yamaha engines, delivering superior components that enhance power and efficiency.
Features:
- Complete Kit: Includes piston, rings, wrist pin, clips, top end bearing, and a gasket kit for a hassle-free installation.
- MOS2 (Teflon/Molybdenum) Coated Skirts: The unique rolled-on application creates a bond that is ten times stronger than traditional coatings. Enjoy benefits such as increased heat transfer, reduced friction, and minimized risk of cold seizures.
- Machined Smooth Heads: Designed to reflect combustion heat and reduce carbon buildup, protecting the piston top. This feature has been shown to enhance horsepower and fuel economy by up to 6%.
- Anodized Domes: Provides increased heat resistance and durability; anodized pistons are 75% stronger than their non-anodized counterparts, ensuring longevity and performance.
- Hypereutectic Casting Process: Offers higher silicon content for reduced expansion rates and enhanced wear resistance. This process also supports the ability to withstand higher cylinder temperatures, making it ideal for high-performance applications.
Benefits:
- Enhanced engine performance with increased horsepower.
- Improved fuel efficiency, saving you money on every ride.
- Long-lasting durability, minimizing the need for frequent replacements.
- Easy installation with all necessary components included.
Use Cases:
- Perfect for racing and high-performance engines that require reliable upgrades.
- Ideal for DIY enthusiasts looking to enhance their Yamaha engine's capabilities.
- Great for mechanics and workshops specializing in engine performance enhancements.
Transform your engine with the NA-40005K Top End Kit and experience the difference in power, efficiency, and durability!
Shipping & Returns
Shipping & Returns
📦 Shipping:
Orders are processed within 1–2 business days. Standard delivery takes 3–7 business days, depending on your location.
↩️ Returns:
You may return or exchange products within 60 days of receiving your order. Items must be in original condition with proof of purchase. If your item is defective or damaged due to manufacturing issues, we’ll replace it at no additional cost.

