Put the motor back together, put it in the frame, and did the break in. Seems fine so far. I let it idle for 5 minutes and let it rest for 20. Then, I let it idle for 10 minutes and rested it for 20 minutes three times in a row. Finally, I road around my yard at quarter throttle for about 10 minutes.
Since my original jetting attempts were done with a bad seal, I put the rich main jets back in. It is definitely running rich, but it runs pretty smooth.
Thanks for the help everyone. Couldn't have done it without you.
Stang