I had a 1977 Sportster, unfortunately the AMF years (San Antonio, TX). Leaked oil bad and even burned a hole in the rear cylinder one time. Rode like a tank, but was a "HD"!
I was young and didn't have an inside place to keep it, so I used a big chain and a cover. Always parked it on my porch (duplex) and one night I came home late from heavy partying and didn't lock it up, just covered it - bingo, the next AM it was gone and the cover too.
That was one of the reasons I didn't want a HD anymore. Everywhere I went it seemed someone was always trying to steal it. I even chained it down to rods that were in concrete one time and came back out side later and it was laying over, they tried to get it but the chain stopped them that time.
I don't miss having to constantly watch for thieves, they don't know how good these metric bikes are, so the chances are allot less.