After doing some investigation into the few tires available in the stock sizes and the likely changes in handling if I changed sizes, I decided to get the Heidenau K63 in the stock sizes. A local motorcycle shop could order them, and could install them if I brought in wheels only, but I decided to have a local scooter shop pull the wheels off and do the install.
So far I'm pretty crazy about them. Maybe because the old tires were so old--they were the originals, made in late 2006. I could lock the front wheel up without trying too hard by braking hard even on dry roads. Not so with the new tires. And cornering is smoother and more predictable. They're definitely a lot better in the rain, too. In a few thousand miles I may change to the Avon setup with the fatter front tire, but I don't think that could turn as easy as the smaller front tire allows.
Does anybody else have a set?
Here are a coupla pics: