Today while I was warming up m y '13 FLHTCUSE, it made made a gawdawful sound. It was parked and idling when a grinding/scraping noise just happened spontaneously. It sounded exactly like the kickstand was LOUDLY scraping across concrete, and lasted approx 1 to 2 seconds. This is the third time since buying the bike that it's happened in 9 months, and it just seems to be random. It has only happened after idling for a few minutes, not at start up, and the bike has always run fine. It never lasts long enough for me to localize it, but I think it's coming from the left side (primary?). Every time it's happened the bike was parked with the kickstand down, not moving at all, and just idling. Motor is stock except for mufflers and an ECM download from the dealer.
Any ideas what it could be, or what I need to ask the dealer to look for? Like I said earlier, it's completely random and has only happened 3 times in 9 mos, so I guarantee they won't be able to replicate it at the dealership.
Thanks in advance,
Dan