I fly from ABZ to JFK on Saturday via FRA all on Lufthansa.

Arrive into FRA at 8.30 local time with flight to JFK at 10.55

I know I get in to a Bus gate and leave from Z25, i have a question that may seem strange.... I am not a fan of trains of any kind... Is it possible to walk to my departure gate without using the Skyline train and how long would the walk take?