Yokomo YOKY4S4 - SLF Big Bore Shock Cylinder (2pcs) for YD-4  [YOKY4S4]

SLF Big Bore Shock Cylinder Compatible with YD-4

This product is an RC damper component supplied as two pieces and intended for installation on the YD-4 chassis, offering the larger internal volume typical of a big bore shock cylinder. The wording is focused on application and fit rather than promotional claims, stating the cylinder serves as a replacement for the shock assembly on compatible YD-4 kits.

Use is limited to vehicles identified as "for YD-4" in the product title; treat this component as chassis-specific and pair it with your existing shock bodies, pistons, seals, and chosen fluid. The part changes damping characteristics by altering oil flow and trapped air volume, which impacts mid-stroke control and overall response in road setups.

Installation steps include shock disassembly, removing the existing cylinder, transferring or fitting appropriate pistons and seals, and reassembling with the correct oil and preload for the car and surface. Follow established shock service procedures and use suitable tools to protect seals and threads during fitting.

Hobbyists and competitors running YD-4 platforms can use these SLF big bore cylinders to tune damper feel and mid-stroke characteristics; verify piston and seal fit before final assembly and make measured adjustments during testing.