The Yokomo B10-302MBA is a brass motor mount made for the BD10 on-road chassis family. As a tuning accessory, it swaps into the centre motor position to add concentrated mass while avoiding relocation of external ballast that can change balance unexpectedly.
Moving from the quoted aluminium centre mount to the brass B10-302MBA increases the motor-mount mass from about 16g to roughly 50g, delivering a net gain near 34g. Positioned on the chassis centerline, the additional mass helps reach minimum race weight targets while preserving side-to-side balance and consistent handling traits.
This component installs as a direct replacement on BD10 series motor mounting points; it is intended for the listed BD10 variants and offers tuners a simple way to refine vehicle weight distribution without asymmetric ballast.
For BD10 racers seeking a predictable tuning route to add central mass, the B10-302MBA provides a direct-fit brass option that maintains motor alignment and helps preserve chassis balance without external ballast compromises.
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