Basically this just happened today to my XT660R:
That ended up in a tow truck ride back home.
Looking on E-Bay XT660R swingarms are scarce, there are a couple more XT660X swingarms.
Is there any difference other than the color? I also have a XT660X and already measured them, they seem to be identical... But not quite sure.
Anyone can confirm if the swingarms of MK1 XT660R/X are swapable? (MK1s had both steel swingarms).