BMax4 Front Coil Spring 1260 Hard Purple for Tuning Yokomo YOKBMS1260  [YOKBMS1260]

Technical notes on the BMax4 front spring

The Yokomo YOKBMS1260 is supplied as a hard purple front coil for BMax4 dampers, stamped with a 1260 rate. It gives a simple route to increase front stiffness and alter roll and pitch behavior on 1/10 touring models without swapping shock pistons or bodies.

Fitting is standard: remove the shock cap, compress the shaft, slide the spring over the shaft and onto the retainer, then rebuild. Always fit matching springs both sides to keep symmetric response and verify the spring does not bind against the shaft or retainers.

Handling effects: a harder front spring raises roll stiffness and curbs front dive, often moving balance toward understeer. To recover neutral handling try different oil weights, tweak bleed rates or soften the rear springs; make incremental changes and compare laps.