I recently rebuilt my bike with a new crank and rod but reused old piston, when i was filling radiator it wouldn't take much antifreeze so i ran it 5 min and it started steaming. I shut it down drained coolant then refilled. This time it burped out air and I got a lot it in. I had no steam after that. I took it down the road and it blew the overflow hose off and the engine quit running. It was locked up. i drained coolant and checked water pump and it moved as well as the piston crank and rod. I refilled coolant once again kicked it. Twice and now its stuck again and have shavings in oil. Anyone have any advice on what went wrong what I could have done differently and what may need fixed now? Help please!!!