Athena 18-19 Yamaha YZ 450 F Complete Stock Bore Cylinder Kit

Restore your Yamaha's heart to top form with the Athena Standard Bore Cylinder Kit (P400485100067). This top-end kit, designed in Italy, is the definitive solution for riders looking to rebuild their engine with components that meet or exceed OEM quality. Designed as a direct bolt-on replacement, this kit eliminates the guesswork and complexity of finding individual parts, providing everything you need for a professional top-end overhaul. Whether recovering from engine wear or performing a planned rebuild, this Athena kit ensures your machine returns to the track or trail with renewed power, reliability, and performance. Key benefits: Exceptional durability and longevity: Built to withstand the extreme demands of motocross and enduro racing, each component is manufactured to the highest quality standards. This ensures long-lasting performance and superior resistance to wear, giving you more time on the road and less time in the workshop. Improved thermal efficiency: Featuring a cylinder with redesigned water jackets and an advanced internal coating, this kit offers superior heat dissipation compared to standard components. This improved cooling helps maintain stable engine temperatures, prevents power loss during long runs, and reduces the risk of premature engine failure. Key features: A brand new, high-performance aluminum cylinder with a special, low-friction internal coating for maximum durability. A complete, lightweight piston kit including piston, rings, piston pin, and clips, all precision-tuned for optimal performance. A comprehensive top-end gasket kit containing high-quality gaskets and seals required for a perfect, leak-free assembly. Designed and manufactured with state-of-the-art CNC machines to guarantee precise tolerances for a perfect fit and flawless operation.