Yokomo MS-503GP 38T Machined Pulley for BD11 BD12 MS1.0  [MS-503GP]

Precision Upgrade for Yokomo BD11 and BD12

The Yokomo MS-503GP 38T pulley is a machined aluminum part built to boost the longevity and drivetrain feel of BD11, BD12, and MS1.0 gear differential cases. Its tight tolerances deliver consistent meshing and resist wear under track conditions.

Advantages of the MS-503GP Pulley

As a 38T unit, the pulley improves torque transfer and helps the gear diff run smoother, which can aid traction and predictability during races. It is aimed at drivers seeking a durable, low-mass replacement.

Track-Focused Performance Benefits

Racers will notice reduced rotational inertia and steadier response from the drivetrain, making acceleration and corner exit more repeatable without adding unnecessary weight.