This machine is impressive in its smooth delivery of power. Cruising at 75, no vibration to speak of, some engine exhaust note, not unpleasant. Very light feel and very responsive. I´ve had this bike for a week now, and discover something new each ride. Brakes are excellent, especially when compared to my ´79 R100RS. K-75 needs a small fairing, too much wind at speed, although in warm weather it isn´t a negative as breeze does cool one a bit if jacket is partially unzipped. Too much heat under seat on warm/hot days. Current temperatures in San Francisco Bay Area are in the 80´s, gets mighty warm down there, is there any way to dissipate more heat, during winter rides might not be too unwelcome. During hot days, gets mighty uncomfortable. No other complaints, like this bike, only bike I´ve had as smooth running as K-75, was a Suzuki GT 750 Water Buffalo.