I took a look under the rear fender, and I think you're going to have clearance issues if you try to drop the suspension, even with the already tiny 15 inch wheel. I'd say that as long as you can get toes down, with the low center of gravity that these bikes have, you'll definitely get comfortable with it over the course of several weeks. My first bike was a CB500 that I couldn't quite flat-foot at stops, and had a pretty high center of gravity. After about a month of riding, I didn't even notice it anymore.
That being said, there are a couple of members doing some pretty significant changes to suspension and rear subframes, so they might be able to chime in with some first-hand experience. In the meantime, have fun!
That being said, there are a couple of members doing some pretty significant changes to suspension and rear subframes, so they might be able to chime in with some first-hand experience. In the meantime, have fun!