I've got a brake question .
mind ya its dealing with the 350 Enfield , but here it is:
Pertaining to the FRONT BRAKE
So
When first applied all is well and smooth
As the Brake heats up , it begins a little grab/release/grab/release repeat , even under only moderate pressure. Like on a long down-hill with a Stop Sign at the bottom. By time I'm getting to the bottom and the Stop Sign its full blown-herkey jerkey stuff , like the roter is warped , but after it cools it's just fine again.
I don't know much about anti-lock or brake fluid temperature reactions , so I just live with it ... know what to expect

.
What I've tried : I replaced the front tire thinking it had a busted cord .
I replaced the rotor thinking it was warped .
It still does the same thing ... heat = pulsing stopping. At one point I chucked it up on the lath and rubbed it with an Angle Grinder to catch any high spots - there didn't seem to be any ?
Any insight into what may be going on ? Maybe its got too many holes in it ?
Or ... Maybe ... I should experiment with some different kind of pads ?
Here's a picture of the old Roter , I cleaned it up and checked for warpage on a Granit counter top , then replaced it anyway (RE parts are cheep).
11.75"