B-MAX2/B-MAX4III Rear Shock Spring for Tuning - Yokomo YOKYAS975  [YOKYAS975]

Yokomo YAS-975 - Big bore shock Rear spring (Yellow) for B-MAX2/B-MAX4III series
Price:
AUD$15.74
Brand:
Yokomo
Model:
YOKYAS975
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Tuning Effects of a Big-Bore Rear Spring

This replacement spring is intended for the rear big-bore shock assemblies used on Yokomo B-MAX2 and B-MAX4III chassis. Supplied in yellow, it matches the larger diameters and travel characteristics associated with big-bore shock kits.

Installation follows standard shock service steps: remove the cap, swap springs while noting any spacers or preload collars, then reassemble and reset the preload to your prior baseline before making further setup changes on track. No special components beyond typical service tools are needed.

From a setup perspective the spring is a primary tuning tool for rear roll stiffness, traction, and weight transfer. Adjusting spring characteristics should be done in concert with shock oil and piston choices to achieve the desired handling balance.

Compatibility

  • B-MAX2
  • B-MAX4III
Remark :
Due to limited stock availability, please notice that some Yokomo items may have to order from the factory and the ready time is around 4-6 weeks. Customer purchases the item is assumed to accept the waiting time which allows us to order directly from the manufacturer if the item is out of our warehouse.

How does this spring influence oversteer or understeer?

Changing rear spring stiffness alters roll and traction: a firmer rear spring tends to reduce squat and can make the car turn in more quickly, while a softer spring may increase rear grip but can make the car feel less responsive.

Should I change shock oil or pistons when switching springs?

It is common to pair spring changes with oil and piston tuning, since those elements together define damping and response. Test combinations to find a balanced setup for your track conditions.

Can I mix this spring with different front springs?

Yes, mixing front and rear spring rates is a valid tuning strategy to adjust balance. Make measured changes and evaluate the car's behavior rather than swapping multiple variables at once.

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