For Big Shock Assemblies: Kyosho IF347-126B Shock Pistons 2pcs  [KY-IF347-126B]

Piston features and tuning notes

This Kyosho IF347-126B product is supplied as a pair of RC shock pistons, intended for larger-diameter shock bodies where multi-hole pistons are used to manage oil flow. They are offered as simple replacement items or as tuning inserts to alter suspension damping characteristics.

Each set contains two pistons that provide multi-hole flow patterns affecting damping response and stroke sensation. Using different piston designs or hole counts changes how oil passes the piston and directly impacts bump and rebound behaviour.

Fitting is conventional: disassemble the shock, remove the shaft and spring, mount the piston on the shaft with correct orientation, then reassemble using the recommended oil and seals. Confirm piston clearance and shaft alignment in the shock body before final reassembly to avoid binding or seal damage.

When dialing in the suspension, match piston selection with oil weight and spring rates. Heavier oils or smaller piston holes slow damping, while lighter oils or larger holes increase response. Make measured adjustments and evaluate on your regular test surface.