Vehicle report
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.
HD-M-1372
HARLEY-DAVIDSON: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. ON SOME MOTORCYCLES, A DEFECT EXIST WITH SOME CHROME HAND CONTROL LEVER KITS HAVING EXCESSIVE CHROME PLATING ON BRAKE LEVERS. MODEL 2014 SPORTSTER. *PE
Complaint counts are reports filed with NHTSA, not failure rates. A common model collects more of them than a rare one that breaks more often.