Heres what I did I weigh the same as you... 160 w/out gear. Take all the preload out, and then back all the compression out... Its the flat screwdriver on top of the shock. Then go in 2 turns and see where you are. I have mine at 2 turns in front and 2 1/2 in the rear. If the rear is still bottoming, stiffen it, half turn at a time. That should do you. Keeping your preload backed out lowers your ride height. Lower height results in lower center of gravity and better cornering. Hope this helps.