This is Yokomo BD10 Brass Motor Mount Black. The weight mounting to match the total weight to the race regulation is a matter of machine balance and mounting space, but by changing the motor mount located at the center of the machine to brass, weight increase without losing balance Is possible. Compared to the standard 16g made of aluminum, 50g made of brass allows a significant weight change of about 34g.
For: Yokomo BD10
Yokomo BD10 Brass Motor Mount Black (1 pc)