xlr8n_xb, I have spoken to storz performance over the phone and their length of the damper they use is a 125mm. I too have a 05 xb12r and i am in the same boat with you trying to figure everything out for the correct fitment. I have lsl frame sliders that are in the way for a storz damper and am not sure if the damper would clear when the wheel is turned. I'll see what i can find for more info. If you find any info please let me know too. thanks