Yokomo BD9 MID Racing Topdeck 2.0mm by Arrowmax AM-910020  [AM-910020]

Upper Deck Designed for Yokomo BD9 MID

This Arrowmax AM-910020 topdeck is an RC replacement part made for the Yokomo BD9 MID layout with a nominal 2.0mm thickness. It functions as the main upper plate that ties the chassis bulkheads together and affects torsional rigidity.

Its role is tuning-focused: altering deck thickness changes chassis feel through corners and affects how quickly the car reacts to steering inputs, without modifying suspension geometry. Install this deck as a direct swap on MID-layout BD9 cars to preserve factory mounting positions.

Installation is simple for standard BD9 MID assemblies—remove the old topdeck, match mounting holes and tighten screws progressively to avoid warping. For setup work, change only one variable at a time and compare lap data to understand effects on mid-corner behaviour and stability.

Offered as an aftermarket option for the Yokomo BD9 MID chassis, this topdeck helps drivers refine chassis stiffness and evaluate on-track behaviour as part of a planned tuning routine.