Aluminum Chassis Plate for YZ-4S - Yokomo S4-002SA  [S4-002SA]

Rigid aluminum chassis plate made for YZ-4S tuning work

The Yokomo S4-002SA is a hard anodized aluminum main chassis intended as a direct replacement for YZ-4S series cars. The treated aluminum surface improves abrasion resistance and supplies a consistent mounting surface for electronics, suspension components, and drivetrain parts within common 1/10 touring configurations.

As the main structural element, the chassis determines baseline stiffness and how mass is spread across the car. Replacing the stock plate with aluminum changes flex characteristics, which alters cornering balance and the suspension feedback you feel. Use this chassis to create a consistent test platform when you are comparing different shock, roll center, or weight distribution settings.

Installation tips: remove electronics and drivetrain components before fitting, reuse original screw positions and hardware when appropriate, and dry-run the servo, ESC, and motor positions before final tightening. Inspect mount threads and tighten bolts progressively to avoid deforming the plate. This chassis is designed for scale RC use and fits the models listed below.

Install the S4-002SA to gain a consistent aluminum baseline for tuning YZ-4S cars; always verify fitment and re-check fastener torque after initial track sessions.