XRAY - Model racing cars

ok, so can someone give me a hint on how they mount the center weight?

I simply use the .

Here are the steps:

1. Make sure you have all of the components (motor, electronics, battery, etc.) that you plan to use on race day mounted. The body and tires are not needed.
2. To balance the front, use a perfectly flat setup board and place one of the chassis balancing tools underneath the front of the chassis into the pre-cut front balancing hole (a little hole right behind the lower bumper braces middle screw)
3. Let 1/4 of the rear of the car hang off the edge of the setup board with the rear facing you. The rear of the chassis should be laying flat across the edge of the setup board somewhere close to the rear axle.
4. Using something like a small phillips head screwdriver, insert it into the pre-cut rear balancing hole (a little hole close to the rear edge of the chassis), and lift up the rear just a few mm off the edge of the setup board (the car should still be slanted downward from the front to the rear). Take note as to which side the car leans to as you lift the chassis up off of the edge of the setup board. If it leans to the left, then you need to add weight to the front/right side, and vice versa, until the car either doesn't lean or it hesitates for a moment before leaning lightly (which is close enough).
5. In order to balance the rear, repeat steps 2-4 with the chassis balance tool underneath the rear and the front of the chassis hanging off the setup board.

Note: I use the XRAY weights with a very small piece of two-sided tape in order to move the weights around to exactly the right spot, before I more permanently mount them

Once you have the front and rear balanced seperately, the car should be able to balance flat easily with both chassis balancing tools inserted into the front and rear pre-cut balancing holes of the chassis.

Please keep in mind that the steps above are used to balance the static weight on the chassis ONLY.

Everytime you change the static weight distribution, beyond just a couple of grams, it is recommended that you go through a full alignment process similar to the one described in the 'Pre-race Alignment & Setup Tips' section of the .