Supplied as a 10-piece set, the Yokomo YR-10OA ball-seat O-ring pack is intended for 1/10 formula on-road damper servicing. The kit provides replacement seals used during shock rebuilds on compatible YR-10F chassis and helps restore correct seating at the ball interface to maintain oil retention and steady damping behavior.
Fitting these O-rings is a basic maintenance task: remove the shock cap and piston, extract the old seal from the ball seat, press the new O-ring in without twisting or pinching, then reassemble and inspect for oil leaks. Work with clean tools and fresh damper oil to avoid contaminating the new rings.
These items are consumables in regular tuning cycles; change them when performing routine rebuilds or if oil seepage or irregular damping occurs. They keep the damper sealed but do not directly change spring or valving settings.
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