The Suzuki Gixxer SF is generally suitable for riders of varying heights and weights, including someone who is 6.1 feet tall and weighs 80 kg. However, personal comfort and perception of the bike's size can vary from person to person. It's recommended to visit a dealership and sit on the bike to get a feel for its ergonomics and how well it fits you.
The Gixxer SF has a seat height of 795 mm, which should provide enough legroom for most riders. However, taller individuals may find that their knees are slightly bent due to the bike's compact dimensions. It's essential to check if the riding posture and legroom feel comfortable to you during a test ride.
As for the ground clearance, the Suzuki Gixxer SF offers a reasonable ground clearance of around 165 mm. This should be sufficient for normal road conditions and speed breakers encountered during city riding. However, if you frequently encounter rough or uneven roads, it's advisable to ride cautiously and be mindful of potential obstacles to avoid scraping the underbody.
Ultimately, the best way to determine if the Suzuki Gixxer SF is suitable for you is to test ride the bike yourself. It will give you a better understanding of its ergonomics, comfort, and overall fit for your height and weight.