Yokomo RP-113425 RP Ultra #42.5 Silicone Shock Oil — 40cc Blue Bottle for RC  [RP-113425]

Yokomo RP-113425 RP Ultra Shock Oil #42.5 (Blue)
Price:
AUD$11.73
Brand:
Yokomo
Model:
RP-113425
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Product Insights for RP Ultra Shock Oil

The Yokomo RP-113425 RP Ultra Shock Oil #42.5 is formulated for use in radio control shock absorbers and dampers. It comes in a 40cc bottle and is colored blue to help you quickly match viscosities during setup.

Role in setup: The oil controls the internal flow characteristics of a shock, directly influencing compression and rebound behavior. Swapping viscosities is an efficient way to refine handling without changing springs or piston assemblies.

Installation and handling: Follow your shock supplier's procedure to open and refill shocks. Remove old fluid, add the RP Ultra oil, compress the shock to remove trapped air, then reassemble. Keep containers sealed and avoid contact with contaminants.

Tuning notes: Use the #42.5 option as a baseline mid-level setting and compare adjacent grades to dial in balance. Track surface, spring stiffness, and piston porting will alter the damping effect, so adjust one parameter at a time.
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 the #42.5 oil clearly identified and what size is the bottle?

Yes. The #42.5 grade is marked by a blue tint and the pack contains 40cc of silicone oil for multiple shock services.

Can I mix different viscosities in one shock to tune behavior?

Deliberate blending is possible for fine-tuning, but it changes predictable behavior. For consistent results, test single-grade changes first, then try measured blends if needed.

Any best practices for bleeding air from shocks?

After filling, compress the shock slowly several times to expel air, top up if required, and repeat until movement is smooth and free of bubbles before final assembly.

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