Well, I forgot to bring my SD card. But I did do some other work and got a lot done.
I cleaned the engine up, saw the plug was running lean and decided to take a further look into it. I took the engine all apart, cleaned it up in mineral spirits.
I found a new side cover with a functioning chain brake for $20, score! I ordered a new sprocket and piston ring on ebay, and I plastic welded up the broken recoil pulley.
I also assembled the engine without the ring, fabbed up a degree wheel and a piston stop and got my timing specs.
I'm looking at exhaust starting at 107* ATDC with a duration of 136 degrees, intake starting at 73* BTDC with a duration of 146*. Transfers open at 129* ATDC with a duration of 105* for a blowdown of 22*.
This seems to have a few odd things, one an intake duration longer than exhaust, and a short blowdown.
I raised the squish from .052 to .022. I'm going to use this for a work saw in various hardwoods, so I would like to lengthen the blowdown for more lugging power but I'm not quite sure how to do that without raising the exhaust and decreasing my power stroke...
Oh, and i found that a 12 point 16mm socket works excellent to remove the clutch.