This 63.5mm centre universal bone is intended for the front side of the centre drive on the YZ-4SF chassis. Made from aluminium with a 70-75 hardness rating, the part is offered as a lighter alternative to standard steel components for RC scale use. Its purpose is concentrated on the centre drive path where reduced rotating mass can influence throttle response and running time.
The component is supplied as a single item. When replacing the original centre link, confirm fitment on the YZ-4SF and inspect mating interfaces for correct clearance and engagement. The design aims to balance durability with reduced inertia rather than serving as structural reinforcement beyond typical RC upgrade expectations.
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