Yes, you can replace a 100/80-17 front tire with a 110/70-17 tire on your Honda Hornet 160R. The primary difference between the two tire sizes is the width and aspect ratio.
The original tire size for the front of the Honda Hornet 160R is 100/80-17, which means the tire has a width of 100 mm and an aspect ratio (sidewall height as a percentage of the tire width) of 80%. The second tire size you mentioned, 110/70-17, has a slightly wider width of 110 mm and a lower aspect ratio of 70%.
When replacing the tire with a different size, it's essential to consider the effects on handling, clearance, and overall performance. A 110/70-17 tire may have a slightly different profile and contact patch compared to the original tire, which could affect the handling characteristics of the motorcycle.
It's recommended to consult with a professional tire dealer or mechanic who has experience with motorcycle tires. They can provide specific advice based on your motorcycle model, riding style, and intended usage. They can help ensure that the tire you choose is compatible with your motorcycle and will offer optimal performance and safety.