Any ideas on how to change EXC speedo from Mph to Kmh and how to change the wheel size. Ta

I was changing my rear tyre today which has a mousse fitted and I thought I'd take a few photos as I went along and show how I do it. The method I use might be different to what others do but I find this way easy and it usually takes me about 10-15 minutes to change a tyre over. I don't have a...