I need some ideas. I have been having health problems that keep me from riding without pain, so it has been in my mind to sell. Took a 25 mile ride on an errand to see if I could get used to riding.

Pulled up to my destination and turned her off, but the starter was ENGAGED. Switched the key on and off. Nothing worked except to turn it on and go home. I have tools in my pouch, but again I am not able to lay on hot pavement and remove starter cable. Nearly made it before she quit dead--no light, horn-nothing. It was 95 degrees and above here all week. Going to be all this next week. Yes, I know I ruined the starter, and probably blue a fuse or burned the battery cable off. Serow, Versy, Lancer, Justin. I need some worst cases to check out when I finally get around to it. I doubt I'll get right to it, but I know you guys like a challenge, and I am old enough to cogitate awhile before I go to ordering parts. lol

Decomp controller has been known, in a few cases, to short out causing the starter to stay on all the time also.

FWIW, on some of the older K model BMWs, this is not an uncommon symptom. The gag is that if the battery is weak, the start solenoid doesn't completely close, and arcs across the contacts. The contacts weld themselves to their respective posts, and the starter spins regardless of switch position.
Solution is new start solenoid and a well charged battery.

I should have a spare stock solenoid around here. I'm just up the road a piece in Shelby County TN. Local metal shred yard has a pile of dead Savages they let me root through occasionally. Most are low mileage with blown engines.