Yokomo S4-302RA YZ-4S Race-Ready Rear Gearbox  [S4-302RA]

Rear Gearbox Brief for YZ-4S

The Yokomo S4-302RA rear gearbox is crafted for pilots wanting stronger, more consistent drivetrain behaviour in their YZ-4S cars. It fits the B-YZ4SF, B-YZ4SF2-1, MOR-010, and MOR-020 chassis and helps maintain steady power flow under load.

Built to Handle Track Strain

With attention to machining and materials, the Yokomo S4-302RA rear gearbox resists wear and keeps gear meshing stable during aggressive driving. That translates to less downtime and more reliable lap times for YZ-4S racers.

Compatibility Notes and Simple Swap

The S4-302RA lines up with the specified Yokomo chassis models and installs without altering core components. Ensure correct hardware torque and inspect bearing seats to achieve a clean installation.