The Yokomo YOKB4-415S left and right steering blocks are made to fit the B-MAX4 III chassis for front-end servicing and steering refinement. They concentrate on the interfaces that seat wheel hubs and attach to suspension links for RC touring cars.
Installation notes: remove stock blocks one at a time, retain serviceable bearings and hardware, and confirm bearing preload plus link alignment during refit. These parts control toe, caster and ackermann; ensure correct left/right placement and check servo horn and steering stop clearance before final tightening.
Tuning guidance: use these blocks during staged setup changes. Check toe under static conditions, then observe dynamic steering response and alter steering link lengths for the ackermann you want. Re-inspect tie-rods and kingpins after a few runs to keep steering consistent.
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