i meant to make another update last night, but when i looked now it was still unposted here in the box for typing.
There was a small dent/ nick on the intake gasket surface, filed it flatter than it was with a hand file unfortunately the dent was pretty deep, it should be good now though. I know it was previously tight because the stupid round end nuts only go so far.
After noting there was gas/ oil seepage on the head and base gaskets I made sure to break out the torque wrench. I did re tap the spark plug hole which is now smooth as butter when putting the spark plug in and it seats fully.
It’s all back together and in the bike, just have to reconnect the wires and try to fire it up.
Hoping now it works as there should hopefully no longer be massive air leaks at the base, head gasket and intake gasket.
First a little nap, I was up for quite a few hours working on this through the night.
You can sand that ridge down. Tape a sheet of sandpaper to a piece of glass and run the head on the paper in a figure 8 pattern. Go slow and keep it flat.
Did you check your squish on that head? That head looks like it would have great potential.
There are multiple ridges on the head and from the imprint on the head gasket I can tell they are complete rings, guess they thought they might help with sealing??? Anyway no I left them for now, I know about the sandpaper/ glass or other flat surface ( I have a granite slab not sure if it’s flat enough) no glass sheet and out of big sheets of sandpaper too.
Thought about checking squish but only have solid plumbing solder, planning to find some resin core stuff to use for that.