Bike Dies after Throttled

[bradfox125]

I recently bought a 1972 XS650. After driving it home for about 30 miles, it died. I was stopped at a red light and it was running fine. After the light turned green, I throttled and the bike died with no electric charge to the automatic starter. I let the bike sit for a few minutes and was able to kick start it. Similar to the above issue, after throttling it again died.

Any help from the group is appreciated.