B-Max4 Front Gearbox Unit Compatible with Yokomo YOKBM302F  [YOKBM302F]

Front Gearbox Replacement for B-Max4

This replacement front gear box is produced for RC use on the B-Max4 platform and serves as a service part for the front drivetrain. It lets you swap a worn or damaged gearbox while keeping the chassis layout unchanged.

The part number YOKBM302F identifies this like-for-like replacement and it returns factory drivetrain alignment and mounting points on B-Max4 vehicles. It is supplied only as an RC accessory and not intended for any real vehicle use.

Installation recommendations: remove the front bulkhead or access plate as directed by your chassis instructions, inspect internal gears and bearings and move or replace items as needed, verify gear mesh and axial alignment prior to final tightening, and apply a small amount of suitable grease to mating gears to limit wear. After fitting, check servo linkages and drive shafts for smooth rotation and perform a low-speed run.

Setup and tuning impact: fitting a fresh front gear box helps keep steering response consistent and ensures reliable power transfer to the front end, while also simplifying gear mesh fine-tuning and bearing renewals during setup sessions.