The Yokomo Y2-RAC4 is a spur hub/top-shaft assembly intended for the YD-2 A-arm SP rear suspension kit used on RC drift chassis. It connects with the kit's rear components and is meant to be installed with the kit-matched parts.
This item functions as a spare or replacement part to keep rear drive alignment and suspension positioning accurate during servicing or when swapping worn parts. Its fitment is consistent with the original kit layout and supports small tuning adjustments to rear geometry.
Assembly guidance: ensure the hub meshes properly with the kit spur gear, confirm bearings are seated correctly, and re-check wheel alignment after installation. Retain the original fasteners and torque recommendations from the A-arm SP kit.
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