Rotor clutch basket

[Hooda]

Awhile back I wrote about my 1988 sportster. The magnets on my rotor clutch basket collided with the stator. I replaced the clutch basket and new bearing in that, replaced clutch hub, new bearing in the trap door and a new clutch shaft ( the part that goes thru the bearing in the trap door and what the clutch hub slides on) and of course new stator. Anyways 400 miles since all that. I pulled the drain plug and I had chunks on the magnetic drain plug. So I pulled the side cover and it's full of chunks of magnets so it did it again. Help what is going on?

[Hooda]

Another question about this problem. Could it be they collided because I pumped the motor up. She dynoed at 80 Hp maybe a little more. Just wondering