YZ-4S Battery Plate Upgrade S4-118PA by Yokomo  [S4-118PA]

Plate summary and benefits

The S4-118PA graphite battery plate is an aftermarket replacement tailored for the YZ-4S chassis. It accommodates common pack formats used on the platform and is specified for use with the B-YZ4SF pack.

Made from one piece of graphite, the plate enhances torsional rigidity compared to stock plastic mounts and provides a firmer base for locating the battery. This helps when tuning front-to-back and lateral balance without changing other components.

To fit, remove the stock battery mount, position the graphite plate over the chassis mounting points, and fasten using the original screws. No special tools are needed beyond typical hex drivers, but verify alignment before tightening to avoid putting excess load on the attachment points.