I have done a few HPDE's in my Z and yes my helmet touches the roof. I am 6'2 but I have learned to compromise my desired seating position for one that will fit not only myself but my helmet as well. Here is what I did to combat the seating issues. I brought the seat forward to give me extra room for the lean. Angled the seat base back dropping my butt a little lower on the touring seats. I then angled the seatback a lil further back giving me a little more room... just enough for my helmet to clear.
I prefer a more up right position but this one is working out for me
