With the head busted off, the threaded section might back out easy. See if you can find a section you can tap on with a screwdriver or something and try backing it out.
2011 XR Midnight Cherry, Hard Bags, Vic htd grips & seat, Vic medium Windshield, unlocked speedo, Lloydz Air filter, VFC III, Lloydz ATS +4, Vance & Hines slip ons
1993 Vulcan 1500 (sold)
1981 Yamaha Seca 750 (ridden into oblivion)
1977 Honda 550 (sold)