Kyosho Mini Inferno Front Gearbox Upper Arm Bulk Precision Alloy MIF012A by GPM  [MIF012A]

Precision alloy upper arm bulk technical overview

This precision alloy rear upper arm bulk is an aftermarket upgrade for Kyosho Mini Inferno ST and Mini Inferno 09 platforms. The single-piece aluminium unit replaces the factory plastic retainer at the front gearbox area and is supplied with the mounting screws required for installation, providing a metal alternative designed for improved rigidity.

As an engineered replacement component, the bulk stabilises the upper arm mounting interface around the front gearbox and reduces pivot compliance under dynamic loads. The result is a firmer connection that can improve repeatability in toe and camber settings across repeated runs, assisting setup consistency for competitive hobbyists.

Installation follows standard Mini Inferno disassembly steps: remove the original front gearbox retainers, transfer any necessary linkages and bearings, fit the alloy bulk using the supplied screws, then inspect for correct alignment and free suspension travel before final tightening. Regular inspection of fasteners after early running is recommended to confirm secure fitment.