I installed the better engine yesterday. Several issues. Drain plug was stripped. Helicoiled it. Removed side cover to flush the aluminum chips and found the small oring between the the case and cover was mangled. also, banjo bolts only had 1 copper gasket each. Adjusted valves. All were tight. Anyway, started right up! Checked oil pressure to head, and took it on a 10 mile ride with no problems! Doesnt have the thin metal gasket between valve cover and head. I hope that doesn't cause me grief. Prior owner rode it a lot so here's hoping. Not super impressed with the rebuild, careless builder fwit. But she's alive and sounds very tight.