Thank you guys. I'm erring on the fact the handbook says the temp could be an issue. Unfortunately, the bike lives outside and it's Baltic up here at the mo!!
sk8muie, you are correct and I'm wrong about being off the bike to adjust the Pre-load. Since you posted I've read up a little on it. My current HB dosen't mention it.
The temperature thing is a given as the shock oil will be slower to move through the small internal valves/holes whilst thicker.
I 'm certain I had an ESA GS where the HB said don't sit on it whilst adjusting the PR. I think it was an 1200 TC but can't be sure.
I think it common sense to take the weight off the bike while increasing the PR, it is after all only a small electric motor. Perhaps unimportant going softer.
I think you virtually say yourself that 'weight off' it operates normally.
Hope it works out ok for you.
