The motor is an S&S; Super Sidewinder (based on Harley's Evolution engine), built out to BBC's specs as the 100 Smooth. The Smooth's secret is it's lower compression ratio, which makes for less violent combustion cycle, which in turn make for very linear, predicatble power. As a rigid-mounted 45-degree twin without any sort of counterbalancing it's still a bit of a paint-shaker at high rpm, but for those familiar with engines of this sort it's definitely an improvement. The transmission is a Baker 6-Speed with Right Side Drive which allows the use of the ridiculously fat 300mm rear tire without having to offset the engine and transmission to one side. The long, sculpted bags are very narrow, but hold a decent amount of stuff as long as it's compressable to the long skinniness of the bags. The fiberglass bags are extremely solidly built, which is a good thing, as they like a nice slam to shut (like my old Caprice). That said, the seal around them looks extremely hearty, though we didn't have a chance to test the waterproofing of the units.