Bearing 2pk 3/4 OD x 9/16 ID x 1/2 Long Y-98

The JESEL Bearing 2 Pack with 3/4 in OD x 9/16 in ID x 1/2 in Long (Model Y-98, SKU JESBRG-20620-2) is a precision needle roller bearing set engineered for high-performance rocker arm applications in racing and performance engine builds. These bearings are designed to minimize friction and support consistent valve timing under extreme operating conditions where reliability and precision are non-negotiable.

The 3/4-inch outer diameter and 9/16-inch inner diameter dimensions are optimized for compatibility with JESEL rocker arm assemblies and similar performance cylinder head applications. The 1/2-inch length provides the bearing pocket depth required for proper support without binding or excessive play. Needle roller bearings in this configuration deliver lower friction than conventional ball bearings, reducing parasitic drag on the valve train and allowing the engine to sustain higher RPM stability. The pair format ensures both intake and exhaust rocker arms receive matching precision components, critical for maintaining symmetrical valve lift and timing across all engine speeds.

This bearing set is essential for builders and racers assembling high-revving naturally aspirated or forced induction engines where rocker arm geometry and bearing clearance directly impact power output and durability. Whether used in circle track competition, road racing, or purpose-built performance engines, these precision bearings support tight tolerances and extended service intervals. The two-pack quantity allows for a complete rocker arm replacement or initial build-out of a performance valvetrain assembly.

JESEL is recognized in the performance engine community for precision-engineered rocker arm systems and components. Sourcing genuine JESEL replacement bearings ensures compatibility and performance consistency when refreshing or maintaining a JESEL rocker arm assembly. This product weighs approximately 0.05 lbs and is supplied as a complete pair ready for installation.