Starter won't shut off

Weird issue...

1. My bike completely shut off while driving with no electrical whatsoever. completely black.
2. I found out the ignition fuse blew
3. I jumpered the ignition fuse and started the bike a few times, no problems. (I did not replace the blown fuse)
4. I started the bike today and the ignition fired....then the starter kept trying to turn regardless of the key position. I tried to turn the bike off and the engine kept trying to turn over. Even when the engine turned over , the starter kept firing. I removed the jumper (noted in point 3) and still kept firing.
5. I removed the negative battery terminal and the bike finally turned off. I also removed the positive terminal as well.

Bike is a 1982 XJ650 Maxim. original fuse box, new battery, and the PO put in a simpler after market gauge and removed turn signals and lights. I just received a blade style fuse box and I plan to upgrade but I want to know if anyone has had this problem before.

 

Likely the starter solenoid is mechanically hanging up or has welded the contacts closed - I would suggest replacing it. With the battery disconnected you can check continuity across the two large terminals and it should read open, yours will likely read a low resistance.