Alright, I'm back with my verdict. Got the yz85 pipe welded on, engine mount holes redrilled and tapped to m8x1.25 then the bolts welded on (my bike frame doesn't have much room so everything is solid on the frame)
The pipe got rid of my 4 stroking. I think since the cylinder is naturally low compression (head is sealed on so I can't mill it down) and there is some scoring on the walls probably making it worse. I'm planning to change the jug out and get a higher compression head as soon as I get a better carb. As for now, I need to upjet because 77 is too small on my RT carb (16mm is too small, I know, I'm just waiting on the 21mm I ordered).
I have the magnet turned 20 degrees clockwise on the crank so its 20 degrees advanced from stock. I doubt it would run on 40 degrees so it must be firing stock at tdc.