During a recent trip to Europe, I was getting front wheel shimmy on braking into bends, (R1200 GS 2016). I have had this on other bikes over the years and its usually the front tyres need replacing and or balancing the weight of the bike, and I was fully laden with luggage/camping gear back seat so not too concerned. I have Avon trail riders on the front with about 4/5k but still some wear left. however when I got home I checked the steering damper and it appears to be easily moved up and down on the centre pivot rubber by about an inch either way, I know there should be some movement by design but it does seem to be a bit too loose when I rock it up and down is this normal ?