Yokomo S4-SB1320 13mm Blank Piston - Precision Upgrade  [S4-SB1320]

Yokomo S4-SB1320 Blank piston for SO/MO ?13mm Shock 2.0mm thickness
Price:
£5.97
Brand:
Yokomo
Model:
S4-SB1320
GTIN:
639342225279
Condition:
Brand New
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Precision Shock Piston Yokomo S4-SB1320

The Yokomo S4-SB1320 is a blank piston for 13mm shock units that lets builders create custom hole patterns to tune damping. Marked drilling guides make it straightforward to place from two up to six holes for consistent results.

Dial in the Dampening

The piston is offered in three thicknesses: 1.5mm, 2.0mm and 2.5mm so you can choose softer or firmer action. Combine thickness selection with hole counts to finely adjust how the vehicle responds to terrain.

Compatibility and Practical Tips

This component fits several Yokomo off-road chassis such as SOR-020, MOR-020 and SOR-020D. It is handy for anyone rebuilding shocks or experimenting with different damping setups.
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.

Is drilling the piston difficult for a home builder?

Not particularly. Use a small drill and a steady fixture, follow the guide marks, and take your time to avoid misalignment or rough edges.

What effect does going from 2 to 6 holes have?

Increasing hole count lowers flow restriction so shocks feel softer and react quicker. Fewer holes increase resistance and make the damping stronger.

Should I match pistons left and right?

Yes, matching drilled patterns and thickness across both pistons keeps symmetric behaviour and predictable handling.

Can I reuse these pistons after swapping hole patterns?

You can reuse them if holes and edges remain clean. If drilling creates burrs or deformation, replace the piston to preserve consistent damping.

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