Kyosho Inferno MP7.5 Alloy Upper Arm Bulk for Front Gear Box by GPM MP7509B  [MP7509B]

Alloy upper arm bulk for front gearbox

This is an RC-scale alloy upper arm bulk produced by GPM for use with the Kyosho Inferno MP7.5 front gear box. The part is intended as an option/hop-up to position the front suspension geometry at caster 2° and toe-in +5°, as stated in the product title. It is supplied as 1pcs and should be treated as a direct replacement option for the front gearbox mounting area on the MP7.5 platform.

In practical terms the component serves two roles: a structural replacement for the standard plastic bulk and a fixed-geometry element that establishes the specified caster and toe-in at the front end. When fitting, check existing mounting points on the front gearbox and reuse the OEM hardware where applicable; the part is designed to mate with the MP7.5 front gearbox assembly without modifying other chassis components.

For tuning, use this bulk as a baseline when setting roll centre and steering characteristics; because caster and toe-in are established by the bulk, further adjustments should be made elsewhere in the front suspension linkages or toe/camber blocks to achieve the desired handling balance for track or practice sessions.