Just to explain my thoughts, I tried one on a Kawasaki Z250 I was building. Although I had it set on the smallest bore setting it was still tight so the springs were loaded. As I pulled the trigger the whole lot was sent spinning in my panic I pulled the tool out and of course my finger was still on the trigger so it went faster and exploded into pieces when it emerged from the bore and sprung open as it spun, (I'm actually laughing as I type and remember this). I've never tried it again and the last time I deglazed bores was on an old Bonneville, (a real one not the latest pretend model). I did that by hand and with fine emery cloth though they are a bit more solid and not as precise as Hondas. I have considered a second attempt but if I did I would have some one hold the block on its side or clamp it in a vice this time. Remember the stones should be allowed to emerge from the bottom partly and not stop at the bottom as it would if you had it stood on it's base. And use plenty of oil to lubricate things. I think the issue is that these tools are really made for larger bores such as cars and not bikes, as I say even set on its smallest setting by the time it was squeezed into the small bike size bore there was quite a bit of tension on the springs.
Love to hear other peoples experiences wit these.
