Here is one pic where you can see they used two different handlebars (both taller). Taller on the first bike, and you can see how the forks are about an inch up on the triple tree. Which could discount some of the shorter head tube. And also discount some of the increased rake (or was it trail?) from taller wheel and longer forks. and this other bike where the handlebars are not as tall. So, if they were having problems with hitting the tank, that would have solved it. I still don't know whether the different triple tree hit the tank or not.