YZ-4S Graphite Servo Mount Plate S4-203PA for YZ-4S and B-YZ4SF - Yokomo  [S4-203PA]

Mounting plate for precise servo positioning

This graphite servo mount plate is manufactured for the YZ-4S platform and compatible B-YZ4SF chassis. The plate offers a light, stiff mounting surface that locates the servo relative to the chassis centreline and steering linkages, helping preserve consistent steering geometry while you tune the car.

To fit a servo with this plate, the maker specifies it must be used with the inner post and outer post hardware listed in the source, specifically the inner post (S4-203A?1, 900) and the outer post (S4-203AO?900). Those posts are sold separately and are required to fasten the plate and secure the servo into the chassis.

Practical installation tips: confirm servo spline alignment before you tighten fasteners, choose screws of the correct length for your servo case, and avoid over-torquing to prevent crushing the graphite. Check that the plate orientation matches the chassis mounting points and verify full linkage travel after final assembly. The plate influences servo placement and steering response rather than motor or drivetrain output.

Tuning role: relocating the servo or changing mount stiffness can alter steering centring and transient response. Use this plate alongside adjustments to toe, steering rate, and servo throw when dialing in handling for different track conditions.