The Yokomo YR-10O is intended as a replacement O-ring for the ball seat in YR-10F dampers, acting as a rubber seal that assists oil retention at the seat and curbs lateral play which can affect damper feedback.
Fitting requires standard shock strip-down: remove the end cap and ball seat, clean contact faces, press the O-ring into place, then rebuild the shock and cycle it to confirm free movement and no leakage.
Regular replacement of the O-ring during shock maintenance helps keep rebound and damping consistent by preventing oil migration and limiting small ball-seat movement that causes inconsistency.
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