The Yokomo YR-10OA is offered as a 10-piece replacement pack of ball-seat O-rings for 1/10 scale formula on-road dampers. These seals are intended for use when servicing YR-10F compatible chassis to re-establish correct sealing at the ball seat and to help the damper retain steady oil levels after reassembly.
Basic installation involves removing the shock cap and piston, withdrawing the old O-ring, seating the new ring without stretching or pinching it, then reassembling and checking for any leaks. Work with clean tools and fresh damper oil to maintain seal longevity and performance.
Use these O-rings as part of routine maintenance and rebuilds; replace them whenever you find oil leakage or inconsistent damping behavior. They serve to preserve the damper's sealed condition rather than alter tuning or spring performance.
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