Originally Posted by Gusgus
Secondly, I have the mustang seat and the "ultimate big boy" seat. I am 6'4" and even though I love the Valk, it throws my lower back out riding it.
Hey Gus - I've got an Ultimate Bigboy too (although I'm 5'7") - I'd suggest getting the Ultimate backrest to give your lower back the support it needs. I've got one on my bike, and can feel a huge difference between having it and not having it.
If you do get one, make sure they give you one with a long 'tounge' so it sits in the small of your back. The stock one was too short - even for me...