I have one from my set sitting in the shop .. They are fully ported have 85cc chambers and B port.
Last season I had the same thing happen to me. Drop a valve made the head junk and seemed easier to buy new heads, then to get it fixed and have it come back as still no good when everything was done to it.
Yes they are bare. here's some pictures .. Also there some nick from the debri that got sucked in from the other cylinder. But should clean up if you take them down to 75cc ..
And they take 2.300 and 1.800 valves