Yokomo S4-300RFA Aluminium Rear Upright Mount for YZ-4S  [S4-300RFA]

Yokomo S4-300RFA Aluminum Rear Suspension Mount (Front) for YZ-4S
Price:
NZD$29.77
Brand:
Yokomo
Model:
S4-300RFA
GTIN:
0639342188185
Condition:
Brand New
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Solid Aluminium Rear Upright for YZ-4S Tuning

The Yokomo S4-300RFA aluminium rear suspension mount is manufactured to reinforce your YZ-4S rear end. Replacing the standard resin bush (S4-300BS), this aluminium part offers greater longevity and a broader range of alignment adjustments, helping you dial in chassis balance for different track surfaces.

Compatibility and Benefits

Suitable with Yokomo models such as B-YZ4SF, B-YZ4SF2-1, MOR-010, and MOR-020, this mount is a flexible upgrade for club racers and competitors. The aluminium build promotes consistent geometry under load, offering steadier handling compared to resin components.
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.

Will the aluminium part make my car harsher on bumps?

You may notice slightly less compliance over uneven sections; that reduced flex can help steering precision but may require minor damping or ride-height tweaks.

Can I use this on older YZ-4S variants?

The mount fits the listed Yokomo variants including early B-YZ4SF models, but always confirm fit against your chassis layout before final installation.

What maintenance does the aluminium mount need?

Inspect fasteners and mating surfaces periodically for looseness or scoring, and reapply thread locker where appropriate to keep the mount secure.

Should I change my rear suspension settings after fitting?

Yes, start with your baseline setup then fine-tune toe and camber since the aluminium mount can alter handling sensitivity compared to resin.

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