Still doesn't make sense, so we are using the sprocket as the brake rotor? Look in that top left picture, the bracket is there with nothing attached. Now maybe they used a drum brake around the clutch.
It does appear that the scrubber brake is homemade after I looked again.
Yea my machinist has me ruined, he will mill a head for me for like $30
Yesterday he turned down a tapered crank shaft from 1" to 3/4 then broached a key way. $60
So anything I need he can do, usually does my stuff for free unless it's super time consuming because I hook him up with metal...
I could ask my dude how much he will charge you and you are more than welcome to mail me the head with some money and I'll pay him and then send it back when it's done.
Just an offer... Dude behind my dads shop has all the machines.
Reminds me of Justin going to remove it by himself so he hammers it "through" because he saw it was supposed to be pressed in. Yea he took out like a square inch of block with the govern wheel stud in the middle. Had to shit can the block because it sent cracks every which way.