Yokomo S4-010A63A Aluminum 63.5mm center universal bone for YZ-4SF  [S4-010A63A]

Center universal bone for YZ-4SF

This is a 63.5mm center universal bone intended for the front side of the center drive on the YZ-4SF chassis. Manufactured from aluminum with a 70-75 hardness rating, the part is presented as a lighter alternative to standard steel components for RC scale use. Its role is focused on the center drive path where reduced rotating mass can influence throttle response and running time.

The component is sold in single-item packaging. When replacing the original center link, confirm fitment on the YZ-4SF and inspect mating interfaces for proper clearance and engagement. The design targets a balance between durability and reduced inertia rather than structural reinforcement beyond typical RC accessory expectations.