Technical service bulletins are instructions a manufacturer sent its dealers about a known fault. They are not recalls and the work is usually not free, but they are the clearest signal of a problem the manufacturer already knows about.
M-1231
Service Bulletin/Repair Instructions
HARLEY DAVIDSON MOTORCYCLE: THE STARTER FASTENERS MAY LOSE CLAMP LOAD. THIS CAN CAUSE THE STARTER TO LOOSEN AND LEAD TO POOR GROUND CONTACT RESULTING IN POOR STARTING AS WELL AS POSSIBLE DAMAGE TO STARTER. *PE
M-1215B
Service Bulletin/Repair Instructions
STEERING STEM NUT/WASHER. THIS BULLETIN IS TO INFORM DEALERS OF UPDATED PARTS AND SERVICE PROCEDURES TO ELIMINATE LOSS OF CLAMP LOAD ON UPPER STEERING STEM NUT. *PE
1211
Service Bulletin/Repair Instructions
HARLEY-DAVIDSON - 2006-2007 DYNA SHOCK SCREW REPAIR. *NJ
852
Service Bulletin/Repair Instructions
THROTTLE AND IDLE CABLE FITMENT. *TT