The key in braking isn't the pads but the "swept area" on the rotor, and it's ability to absorb and/or radiate heat to the surrounding air.

The pads won't make that much difference, except that since the rotor is going to hot, you want to seek out pads with a higher melting point.

In calculating how much brake you need, you need to factor the vehicle weight, and the amount of speed you intend to drop, and how often you'll be braking, or how much time the rotors will have to cool off between braking intervals.

OTOH - you may be in luck. If this is truly a closed course vehicle, the braking needs may be extremely low, mainly some scrubbing of speed as you enter turns, then a final stop after coasting down at the end.

I can't advise on the specifics since I don't know them, but be honest with yourself. If it's a closed course bike, keep it there, or make sure you have adequate bakes for street use.