I have a suzuki boulevard c50. The battery died over the winter and had to be charged. It has failed to crank 2 times since then. I jumped it off and rode for about 50 miles home after turning it off it would not crank. It does not seems to be charging, I jumped it off and removed the cable and it died. What do you think the issue may be?

It sounds like it is time for a new battery. While the regulator could have been damaged during the jumping procedure, the symptoms you've outlined still point to a bad battery. Motorcycle batteries do not fair well from a complete discharge. Sometimes removing the all of the acid and replacing with new acid will provide another year of service, but not always.

My reasoning for the thinking it is the battery is because of it not being kept charged over the winter and it was working fine before then (charging system usually does not get damaged from non-use). If the bike died when you removed the cable while it was idling, this would suggest the battery as well as a magneto based charging system is very weak at idle and relies on the battery to supplement it during periods of idle. To test my theory, jump the bike off, rev it to 1200 to 1500 RPM and disconnect the jumper cable. If the bike continues to run but dies when you let it idle, then the charging system is functioning and the battery needs to be replaced.