diff --git a/src/kiri-dev/fdm/FolgerTech.FT5 b/src/kiri-dev/fdm/FolgerTech.FT5
index 9cd9fd83..a4267d73 100644
--- a/src/kiri-dev/fdm/FolgerTech.FT5
+++ b/src/kiri-dev/fdm/FolgerTech.FT5
@@ -13,8 +13,7 @@
         "M109 S{temp} T{tool}     ; wait for extruder to reach target temp",
         "G0 Z0.25                 ; position 0.25mm over bed",
         "M117 Purge Nozzle        ; announce purge",
-        "G1 X100 E30 F600         ; purge 30mm from extruder",
-        "M900 K{kfactor}          ; k factor"
+        "G1 X100 E30 F600         ; purge 30mm from extruder"
     ],
     "post":[
         "M117 Done           ; announce done",
diff --git a/src/kiri-dev/fdm/Prusa.i3.MK2S b/src/kiri-dev/fdm/Prusa.i3.MK2S
index a5c9d203..8eb99feb 100644
--- a/src/kiri-dev/fdm/Prusa.i3.MK2S
+++ b/src/kiri-dev/fdm/Prusa.i3.MK2S
@@ -13,8 +13,7 @@
         "M104 S{temp} ; set extruder actual required temp",
         "M109 S{temp} ; wait for extruder actual required temp",
         "G1 X60.0 E9.0  F1000.0 ; intro line",
-        "G1 X100.0 E12.5  F1000.0 ; intro line",
-        "M900 K{kfactor} ; set Linear Advance factor, see https://www.prusaprinters.org/fw-3-1-0-linear-advance-drivers-1-9-1/"
+        "G1 X100.0 E12.5  F1000.0 ; intro line"
     ],
     "post":[
         "G4 ; wait",