R12/GT500 Suspension Upgrade: YOKR12-09G Hard Upper A-Arm Mount by Yokomo  [YOKR12-09G]

Yokomo R12-09G - Hard Upper A-Arm mount for R12/GT500
Price:
AUD$29.05
Brand:
Yokomo
Model:
YOKR12-09G
Please kindly input your name and email address, we will inform you once we have the restocking.
Or you may find similar product under the
Spares / Hop-ups - Yokomo - R12 category
Write a review

Mount function and setup

This hard upper A-arm mount is made for the R12/GT500 platform and carries the Yokomo part code YOKR12-09G. It replaces the standard upper mount to increase pivot stiffness, altering the car's initial roll and transient characteristics while keeping arm length and core geometry intact.

The part is intended as an aftermarket upgrade for racers seeking crisper roll response and steadier camber under load in 1/12 scale competition. Adjust other suspension elements as needed to tune the new response.

To install, remove the stock upper arm mount and fasten this replacement to the existing suspension towers and linkages on the R12/GT500 chassis. Because pivot stiffness changes, proceed with stepwise setup adjustments to understand the handling trade-offs.

Specifications

  • Item: Hard Upper A-Arm Mount
  • Material: Not specified
  • Model Number: YOKR12-09G
  • Compatibility: R12, GT500

Compatibility

  • R12
  • GT500

As an upgrade component, this mount offers a direct method to change suspension stiffness characteristics on R12/GT500 cars; combine with damper and swaybar tuning for best on-track results.
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 should I adjust setup after fitting this mount?

Start with small damper and anti-roll bar adjustments. Since the pivot is firmer, you may need to soften rebound or change bar settings to recover desired rotation and balance.

Does this change affect corner entry or exit more?

The main effect is on transient response and roll onset, so you are likely to notice changes at corner entry and during weight transfer. Tune progressively to find the preferred behaviour.

Can I pair this with softer top mounts or inserts?

Mixing stiffness levels across suspension components is a common approach. If you pair a harder upper mount with softer elements elsewhere, test to ensure the overall balance suits your driving style and track conditions.

Will this affect shock tuning significantly?

Yes, a firmer pivot changes load transfer rates. You may need to refine shock oil, piston choice, or valving to maintain the desired mid-corner grip and response.

Copyright © 2008-2026 rcjaz.com.au All rights reserved