I am the original owner of a 2009 F800GS. The bike has 65000KM on it now, I don't carry passenger or luggage, so far have ridden it on easy dirt road for 2-3 times. Recently I found the rear shock very soft and bouncing a bit. I tried adjusting both the preload and damping from Min to Max (and Max to Min as well) but I don't realize any difference - it's still very soft and bouncing even both the preload and damping on max. Does it mean the rear shock is gone and I need a new shock. Just wonder how come the sock gone so quickly. Shall I replace with stock BMW shock or others like Ohlins, any recommendation?