Yokomo S4-300RSA 1mm Rear Suspension Shim  [S4-300RSA]

Yokomo S4-300RSA Aluminum Rear Suspension Mount Spacer for YZ-4S
Price:
£3.44
Brand:
Yokomo
Model:
S4-300RSA
GTIN:
0639342210107
Condition:
Brand New
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Accurate Rear Geometry with Yokomo S4-300RSA

The Yokomo S4-300RSA Aluminum Rear Suspension Mount Spacer is aimed at enthusiasts tuning the YZ-4S and compatible chassis. This 1mm spacer provides a fine adjustment to rear suspension geometry, helping to refine handling and consistency across runs. Made from aluminium, it keeps mass low while offering strong resistance to wear.

Refine Traction and Cornering

Primarily for the YZ-4S, the spacer is also compatible with B-YZ4SF, B-YZ4SF2-1, MOR-010 and MOR-020 chassis. That single millimetre can change rear-end behaviour enough to alter traction and mid-corner balance, making it a useful tool when tuning for different surfaces. Use it to tweak balance between rear grip and steering feel.

Installation Notes and Durability

Installation is straightforward and uses the standard rear mount hardware, requiring only common hand tools. Its multi-chassis compatibility makes it a practical component for racers and club drivers who swap parts. The aluminium build ensures repeatable set changes and long-term durability.
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 will this spacer affect lap time?

A 1mm spacer can improve consistency and confidence in certain corners, which may translate to better lap times when combined with other setup changes. It is a tuning tool rather than a single game-changing part.

Can I run multiple spacers together?

Stacking spacers increases the change but be cautious as multiple shims can affect clearances and alignment. Test progressively and check for binding or altered geometry limits.

Does it require maintenance?

Inspect the spacer and mounting area during routine checks. Ensure screws are torqued correctly and that there is no excessive play; clean contact surfaces if you change setups frequently.

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