RT4 Motor Support Extensions - Long

Long extensions for the RT4 motor mount from Scaleauto: precision in every detail of the chassis

When preparing a slot car for competition or working on the setup of a Scaleauto chassis, the small details make a difference. The long extensions for RT4 motor mount (SC-6539B) are the original spare part designed by Scaleauto to maintain the correct position of the motor within the chassis, ensuring optimal drivetrain geometry and efficient power transfer.

Function and performance

The motor mount extensions have a key structural and mechanical function: they define the distance between the motor and the rear axle, which directly affects the tension and alignment of the drivetrain. Using the correct length extension — in this case, the long version — is essential to avoid play, vibrations, or premature wear of the crown gear and pinion.

• Original Scaleauto spare part, reference SC-6539B.
• Long version of the mount, for specific configurations of the RT4 chassis.
• Allows for proper alignment of the motor-transmission assembly.
• Manufactured to fit precisely in Scaleauto's RT4 support system.

Compatibility

These extensions are specifically designed for the RT4 motor mount from Scaleauto. Before placing your order, we recommend checking that your chassis or motor mount is indeed the RT4 model, as Scaleauto has several references of mounts with different geometries. Consult the technical documentation of your chassis or the assembly manual to confirm compatibility.

Assembly and preparation

Changing these extensions does not require special tools, but it does require careful work to ensure a clean and symmetrical assembly. When installing them:

1. Remove the motor from the mount by loosening the corresponding fastening.
2. Replace the worn or broken extensions with the new ones (SC-6539B).
3. Check that the motor is properly seated and that the crown gear meshes correctly with the pinion, without excessive play or tightness.
4. Verify the alignment of the rear axle before putting the car back on the track.

Common mistakes

One of the most common mistakes when working with motor mounts is confusing the short version with the long one. Ensure that you are ordering the reference SC-6539B (long) and not the short version, which has a different reference. Using an incorrect length extension can lead to poor drivetrain alignment and subpar performance on the track.

Frequently asked questions

Which Scaleauto chassis are these extensions compatible with?

These extensions are designed for the RT4 motor mount from Scaleauto. If you are unsure whether your chassis uses this mount, check the reference of your chassis kit or contact us before placing your order.

What is the difference between the long and short extensions?

The length of the extension determines the distance between the motor and the rear axle. The long version (SC-6539B) is used in configurations that require greater separation, while the short version is used when that distance is smaller. Using the incorrect length directly affects the meshing of the drivetrain.

How many units are included in the pack?

The information provided by Scaleauto does not specify the exact number of units included in the blister. We recommend checking the official datasheet or contacting us to confirm this before placing your order.

Can these extensions be used on chassis from other brands?

They are an original spare part designed for Scaleauto's RT4 system. Their use on chassis from other brands is not covered by the manufacturer and may not be dimensionally compatible.

The Scaleauto SC-6539B long motor mount extensions are an original spare part designed for the RT4 motor support system. Essential for slot car chassis setup and drivetrain alignment, these extensions ensure proper motor positioning and efficient power transfer. A must-have replacement part for Scaleauto RT4 chassis preparation and competition tuning.

Information not available

It has not been possible to confirm with the available documentation the exact number of units included in the blister of reference SC-6539B. If you need this information before placing your order, please do not hesitate to contact us.