I went from a 05 ST660, and riding ZR chassises since 95, to my new Z1. Its by far the best handling Cat I've ever owned. I' ve had it up to 95 mph, its averaging 15.6 mpg, the power is fine for trail and touring. It doesn't have the pull that my turbo 660 had but still very responsive. I have not talked to anyone that has not been completely happy with the new twin spar chassis. Good luck with your choice. :chug: