I have a 2012 YZ450f and I just rebuilt the top end. I had it started and running but didn't have my valve cover gasket on right so I lost some oil, I fixed the gasket and put some more oil in. I started it again let it warm up and turned it off and took the overfill bolt out and nothing really came out. The I started the bike again and it idled for about 1 minute then it died and haven't been able to get it started again. So i drained the oil cold replaced it with 1 quart, and now i kick it about 20 times the sight glass fills up and its not draining. Do I still have too much oil in the engine and is that what's causing it not to start or did something else go out? Very frustrated! Thanks in advance!