[Cajundaddy]

Smaller brakes might even be better for AX with less rotating mass and less unsprung weight. In most cases, if you can lock up your front brakes or put them into ABS, you have plenty of braking power. Then the question becomes heat dissipation which isn't really an AX problem.

If you are running DE or club racing and regularly cooking your brakes even with hi temp fluid, cooling ducts, and racing pads then you may need bigger brakes to dissipate more heat quickly during continuous lapping. A bigger motor certainly generates more speed at the end of a straight, but weight removal might neutralize the extra stopping power and heat sink needed.