Fil wrote:I think I will contact my local bike shop to see how much they will charge to do the job before I think about trying to do this myself - I've trued a few bicycle wheels in my time, but they didn't have to support a 190kg bike with my fat ass sat on it
You need a trueing stand, you need to take the wheels off. It's the only way to get it right. It
will affect your handling.
Don't take it to the local shop unless you know they have someone who knows how to true wheels -- otherwise you'll get a half-assed job, no better than you could do yourself. You've done it with bicycles, so you can do it. But you need a trueing stand. If you want to make one, I've got some diagrams and pictures somewhere.
Just be glad it's not a GS. There aren't many people in the world who can do them. (I mean BMW R100GS. Tubeless. The spoke pattern is...unusual - it's like back-to-front.)
............PS: It looks like I was thinking of a balancing stand. Although I suppose it would still be easier to true the wheels on one.