The Yokomo B10-302MBA is a brass centre motor mount crafted for the BD10 on-road chassis family. As an aftermarket tuning accessory, it replaces the standard centre motor mount with a heavier brass piece to add mass without shifting external ballast that can disrupt balance.
Replacing the quoted aluminium mount with the brass B10-302MBA increases the motor-mount mass from about 16g for aluminium to approximately 50g for brass, giving a net gain near 34g. Because the mount sits on the chassis centreline, the added mass assists in meeting minimum race weight while helping to preserve lateral balance and predictable behaviour.
Fitment is intended as a direct swap into BD10 series motor mounting points; the part is designed to suit the listed BD10 variants and to offer tuners a way to alter weight distribution without resorting to asymmetric ballast placement.
For BD10 builders and racers seeking a compact central ballast solution, the B10-302MBA delivers a direct-fit brass option that keeps motor alignment and helps maintain chassis equilibrium compared to external weights.
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