200cSt Shock Oil Tuning Fluid - Yokomo YOKYS200 for RC Suspension  [YOKYS200]

Tuning with 200cSt Shock Oil

YOKYS200 shock oil is a silicone-based 200cSt fluid intended for RC shock absorbers where a medium damping level is desired. It influences compression and rebound by changing fluid flow through internal pistons and shim stacks and is used to tweak handling behavior rather than to replace components.

Fitting instructions: drain the old oil, clean the shaft and seals thoroughly, then fill the shock to the recommended level while avoiding trapped air. Move the shaft through its travel as you fill to purge bubbles, remove excess oil from the outer surfaces, and ensure seals sit correctly before reassembly. A syringe or dedicated filler helps control volumes precisely.

Tuning advice: thicker oil increases both compression and rebound damping for a slower, more controlled response and reduced high-frequency flutter; thinner oil makes the suspension more responsive and compliant. Treat 200cSt as a baseline for moderate damping and then tune springs, piston holes, or shim stacks to restore balance after a viscosity change. Validate changes on a measured run and refine gradually.

Handling and storage: keep containers sealed, store at room temperature, clearly label types to prevent mixing different viscosities, and clean tools after use. Dispose of used fluid responsibly according to local guidelines.