Originally Posted by
D-nicest
On my car I have about 4.5mm in spacing in between the graphite on the plates with the stock disk being used. You need to leave some excess space because 1) as the metal on the disk heats up it expands, and 2) the disk doesn't spin perfectly true and may rub up on the pads if they are too close causing more friction=heat. Also, although the KM's have worked great for me, having graphite for the plates decreases the area for the heat to dissipate, so the Disk tends to take more heat. So I'm guessing you may need to back out on the screws some to get rid of your issue. Hopefully that helps.
Diatta, thanks alot for the advice! Last race meet I was able to keep the same brake power throughout the entire day...
I believe it was because I left a bigger gap between brake pads and the contact point between the post and the brakepads was not when the brake arm was perpendicular to the front-to-back. (Hope that made sense).