There usually is an arrow cast into the rim on BMW bikes, to show direction of rotation, I'll have to get out to my LS, and see if this is the case on the LS rims or not .
I just checked my LS, and there are no arrows for direction of rotation cast into the rim .
What I did notice, was that there was more clearance between the rivet heads on the right side fork leg, as compared to the left side .
Don't know if it helps at all !