Stiff pedal with kickdown hooked up. Help please!

another thing you could try is this. I noticed on mine that the outer sleeve is flimsy really has no strength to it. maybe try swapping out that for the black style like stock that has holds it shape better. Perhaps its pushing against the outer sleeve because it doesnt have as much strength to hold its shape? I noticed the motorcycle cable i used was more rigid then the plastic tube and SS braid stuff.