I think not, in the lyrik- not 100% but I think the lyrik springs all use the stanchion as the outside of the air spring, and your coil will have scratched it. Certainly I was told once I converted my 2-steps to coil that there was no way back
It’s an old thread, but, you’re pretty much the same weight as me and I use a red. In fact I had a yellow for a while and found it hopeless, riding everything in the bottom of the travel. YMMV of course but I’m just a bit surprised you’re finding it a problem. (Rockshox do recommend yellow for our weight though)
Did you get the damper working how you like? It’s a great damper, mission control, very similiar to the damper used in the boxxer team and worldcup until very recently. Very powerful and transparent adjustment usually- it’s easy to set it up terribly to be fair because you have so much control. There’s a pretty good guide here:
http://www.sram.com.cn/sites/default/files/techdocs/missioncontrol_tuningguide_en.pdf
If you want to keep the damping identical when removing the floodgate you do have to change the oil, but I didn’t bother- I just adjusted to suit.