DVDitman, I had the same problem at 7,000 miles. The bullet was running perfectly it suddenly died and there was no compression. Have you decarbonized the cylinder head yet? It's recommended at about 6,000 miles. What happened with mine was that a piece of carbon flaked off of the cylinder/piston and planted itself on the intake valve seat. It wedged the valve open only a couple of thousandths of an inch. It was enough to lose compression. Usually if a piston fails you get some warning, IE lots of preignition pinging. Like suggested, listen to the exhaust and intake. If you hear a hiss during the compression stroke on the carb side, the intake valve is sticking open. If you hear it on the exhaust pipe side, the exhaust valve is sticking open. The fix is pretty straight forward. You will have to pull the head, remove the valves and clean up the carbon on the piston and cylinder head. If carbon is not the culprit, you may have burned a valve. However, this also usually will give you a bit of warning before it happens, IE popping threw the carb or exhaust. The guys in forum actually diagnosed the problem for me. I did the job myself and it took me about 3 hours. This included lapping the valves. Good luck! cochi