I finally got out in the shop, and the engine should be ready to fire in a few weeks. Its got: arc rod, new ring set, dynocam somethin or another, billet lifters, 20# springs, split locks, copper head gasket..
Still not sure what to do to mount it up in the minibike, its gotta tilt at least 7degrees forward.
This was a generator spec engine so it had a tapered shaft like the crank on the left. I resized crank and cut a keyway. The finished shaft came out real nice, its as good as a factory one.
Little bit of overlap.........
I used a carbide tipped bit in the lathe to set the valve clearance, one thousandth at a time. The billet lifters needed some trimming as well and I used the same setup.
its hard to see but the finish looks factory.