Kyosho Inferno MP7.5 Front Upper Arm Mount Alloy MP7509B by GPM  [MP7509B]

Alloy upper arm mount for the MP7.5 front box

This RC-scale alloy upper arm bulk is intended for the Kyosho Inferno MP7.5 front gear box as a hop-up option. It positions the front suspension geometry to caster 2deg and toe-in +5deg as described in the product title. The unit is supplied as 1pcs and is suitable as a replacement for the standard front gearbox bulk on the MP7.5.

The part serves as a stronger structural alternative to the factory plastic bulk and as a fixed-geometry element that defines the stated caster and toe-in values. When fitting the component, check the front gearbox mounting locations and reuse original hardware where feasible; the bulk is designed to interface with the MP7.5 front gearbox without requiring changes to other chassis assemblies.

Use the bulk as your geometry reference when setting roll centre and steering behaviour; because caster and toe-in are set by the bulk, further tuning should focus on the steering link geometry and toe/camber adjustments to dial in handling for different tracks or practice sessions.