After replacing nearly every piece of the front brake on my sons bike trying to figure out why they sucked so bad I found posts from other message boards showing setups with different rotors & calipers with adapters. Here's what I did. Bought a used stock rotor, removed the rivets to get to the carrier. Inside radius of the new rotor was smaller so had to grind down the carrier a bit. Drilled/tapped each hole on the carrier to 8x1.25.