Re: Very bad vibration.
I've never used an inferior tire-rubber spoke-clamp adapter. I read a number of posts here before I built my first bike. I've used an MM hub adapter from day one. It's been one of the things about my bike that, though I've checked regularly, I've never really worried about. And I can't really complain about vibration either, although I do not use rubber motor-mounts. I bolt directly and solidly to the frame. I tend to keep my rear wheel and chain as aligned as possible. Perhaps that is why it vibrates so little, regardless of RPM. The engine, and the way the bike glides, always seem to feel "just right".
"There is nothing wrong with wanting a motorbike that is an extension of your personal taste and fashion sense; if you must ride somewhere, I say do it with style