18526-89A Big Axle "power Glide" Hydraulic Tappets

These Jims Power Glide hydraulic tappets are engineered for Sportster, RS, and tube frame Buell models, providing a significant upgrade over stock components. Replacing OEM 18526-89A, these American-made tappets are machined from aircraft-quality steel and held to a precision tolerance of .0002 inches. The Big Axle design is specifically built to withstand the demands of high-lift performance cams, eliminating hydraulic collapse and ensuring zero valve lash. This allows your engine to safely reach higher RPMs with consistent valvetrain control. Sold individually, these tappets feature a hardened pushrod seat and an internal spring-assisted valve for superior hydraulic management in demanding riding conditions.