Kyosho IF125B Universal Swing Shaft (Front)  [KY-IF125B]

Front universal swing shaft for Inferno

The Kyosho IF125B Universal Swing Shaft (Front) is an RC-scale replacement part intended for front drivetrain use on relevant Inferno MP Series models. It serves as a direct swap for the front swing shaft assembly where the chassis and parts layout match the Inferno NEO 3.0 & 4.0 family, helping restore front-wheel driveline connection after wear or crash damage.

Compatibility and role: this shaft is specified as a front universal swing shaft for Inferno MP Series NEO 3.0 & 4.0 chassis. Use it when a worn or bent front shaft is affecting steering feel, front traction, or when installing a refreshed front driveline during setup changes. It is a component-level replacement rather than a whole assembly upgrade.

Installation and tuning notes: the part is intended to replace an existing front swing shaft without major chassis modification. Check spline alignment and clearance at the hub and gearbox interfaces before final assembly, and verify that existing pins, hexes, and bearings are serviceable. Small alignment or bearing issues often show as play at the wheel or binding during full suspension travel, so correct fitment supports predictable handling and consistent front-end behaviour during tuning.

Practical advice: keep original hardware and inspect associated walk shafts and universal joints for wear when replacing the shaft, as reusing worn mating components can hide the benefit of a new shaft. This part is useful for maintenance spares, rebuilding a damaged front driveline, or restoring precise front-end response after impact.