The VMax not an inline 4, it's a V4, the same engine that is in the Royal Star Tour and the Venture - although the tuning is a little milder in the bigger bikes. The 165 mph Suzuki TL 1000R proves V-Twins aren't just for lugging along. Ducatis V-Twins are fast bikes too, or so I hear.
I did see one guy who builds custom choppers with the TL 1000 V-Twin engine. Wow.