Kyosho Inferno MP7.5 Front Gearbox Alloy Upper Arm Bulk (Caster 2deg, Toe-in +2deg) MP7509A by GPM  [MP7509A]

Front upper arm bulk overview

This alloy replacement upper arm bulk fits the Kyosho Inferno MP7.5 front gearbox assembly. It locates the upper arm pivot and sets a fixed caster of 2deg with a +2deg toe-in orientation, providing a direct-fit hop-up that matches MP7.5 chassis geometry.

Installation follows standard MP7.5 front gearbox practice, using the existing mounting points on the gearbox and upper arm tower. Fit with the factory hex screws and correct thread engagement, avoid over-torquing to protect mating plastic parts, and recheck alignment after tightening to confirm the intended caster and toe settings.

For setup work this bulk gives a consistent reference for front suspension geometry when you change arm length, alter shock position, or test different roll centre choices. Use it when you need a repeatable caster and toe baseline or when replacing a worn factory unit on the MP7.5 platform.