Hirobo HI0301023 XRB EX M4 Ball Link  [HI0301023]

Replacement M4 Ball Link - XRB EX Fitment

This RC-scale spare is catalogued under Hirobo XRB parts and is intended for XRB EX series linkages. Supplied as part number HI0301023, it serves to recover or preserve correct ball-end function on scale helicopter control assemblies.

Fit the part as a straightforward replacement: extract the worn link, check that the M4 thread seats into the receiving rod or control horn without resistance, and secure the connection so the joint retains smooth articulation. Avoid pressing incompatible parts together and confirm free movement before flying.

On the setup side, swapping ball links will influence linkage geometry and control feel. Use HI0301023 to reinstate original geometry and consistent servo-to-linkage behavior rather than to modify travel limits.