Yokomo B9-S116A 6-Hole Piston for BD9 High Bore Short Shock  [B9-S116A]

Yokomo B9-S116A 6 hole piston for BD9 High bigbore short shock
Price:
CAD$14.19
Brand:
Yokomo
Model:
B9-S116A
GTIN:
0639342204786
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Spares / Hop-ups - Yokomo - MRTC-BD10FF category
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Yokomo B9-S116A piston for refined BD9 short shock control

The Yokomo B9-S116A piston is a targeted upgrade for BD9 high big bore short shocks, developed with AXON input. It uses six precisely placed holes to boost vibration absorption and increase traction. The larger outer diameter adds stability during big rolls and helps keep the rear planted in fast cornering.

Performance notes and setup guidance

Versus the factory 4-hole BD9 pistons, the B9-S116A has larger hole diameters for quicker response and smoother damping. Start by fitting your usual shock oil when you swap pistons, then fine tune by testing heavier oils in the #50 to #100 range to match track conditions and driving style.

Suitable Models

  • MSR-BD12
  • MSR-BD12A
  • MRTC-BD919
  • MRTC-BD919S
  • MRTC-BD10
  • MRTC-BD10A
  • MRTC-BD10FF
  • MRTC-BD10LC
  • MRTC-BD10LCA
  • MRTC-BD10LCR
  • MRTC-BD10LCRA
  • MRTC-BD11-1
  • MSR-BD11
  • MRTC-BD11US
  • MRTC-BD11A-1
  • MSR-BDFWD
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 the six-hole layout change shock feel?

The extra holes allow a wider flow range, which smooths small vibrations and improves traction on bumpy surfaces while keeping midstroke control for jumps and hard landings.

What oil should I try first with the B9-S116A?

Begin with the shock oil weight you currently use on your BD9 setup, then test increments towards #50 or #100 to find the balance between roll resistance and traction for your track.

Do I need extra assembly steps to fit this piston?

Installation follows the standard BD9 short shock rebuild process. Check for burrs, ensure the piston moves freely on the shaft, and bleed the shock to remove air pockets after reassembly.

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