SLF Big Bore Shock Cylinder Upgrade for YD-4 - Yokomo YOKY4S4  [YOKY4S4]

Yokomo Y4-S4 - SLF Big Bore Shock Cylinder (2pcs) for YD-4
Price:
AUD$25.90
Brand:
Yokomo
Model:
YOKY4S4
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SLF Big-Bore Damper Cylinder — YD-4 Fit

Supplied as a matched pair, this RC damper component is intended for use on the YD-4 chassis and provides the greater internal volume characteristic of big bore cylinders. The content concentrates on practical use and compatibility, identifying the cylinder as a replacement element for the shock assembly of supported YD-4 kits.

The product is compatible only with models designated "for YD-4" and should be integrated with the vehicle's existing shock bodies, pistons, seals, and oil. By changing internal volume and oil flow dynamics, this component modifies damping response and mid-stroke control for road-focused setups.

Fitment requires shock disassembly, removal of the original cylinder, transfer or replacement of pistons and seals as needed, and reassembly using the correct oil weight and preload. Employ standard RC tools and careful seal handling to avoid damage during installation.

Specifications

  • Item Yokomo Y4-S4 - SLF Big Bore Shock Cylinder (2pcs) for YD-4
  • Model Number YOKY4S4
  • Material Not specified
  • Compatibility YD-4

For modelers and club racers working with YD-4 vehicles, the SLF big bore cylinders are a straightforward modification to change damper character; always check internal clearances and perform stepwise testing to refine handling.
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.

Do I need special tools to fit these cylinders?

No special tools beyond typical shock service tools are required; use shock pliers, hex drivers, and a clean workspace to avoid damaging seals during removal and reassembly.

Can these cylinders improve corner grip?

They can influence mid-stroke behavior that affects weight transfer and traction; the net effect depends on piston choice, oil grade, and other suspension settings, so combine changes with incremental tuning.

Is there a recommended oil viscosity to use first?

Start with the oil weight used previously and evaluate changes; many users test one step higher or lower in viscosity to balance the altered internal volume and achieve desired response.

How should I check for leaks after fitting?

After assembly do a static leak check by compressing the shock and inspecting seals, then run a short on-track session and recheck for seepage, oil level stability, and cap torque.

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