Choke **** on my '03 FXD didn't hold (refused to stay out). Here's how I solved this issue, using a 5 x 12 mm piece of electrical tape.

Here's the trick:
By applying the tape to the cone, the cone's diameter enlarges. As a result of this, the knurled plastic nut puts more pressure to the cone and when pulled, the choke **** will stay out....





Step 1:
Loosen 17 mm hex nut
Loosen knurled plastic nut
Pull out choke **** and secure with spreader tool (made out of a metal wire hanger)





Step 2:
Apply a 5 X 12 mm strip of electrical tape to the cone





Step 3:
Fasten the knurled plastic nut





Step 4:
Remove excess tape using a breakable hobby knife





Step 5:

Position the cable assembly in slot in bracket (star washer at nut side of the bracket) and tighten the 17 mm hex nut using an open wrench

 

Adjusting the knurled nut/cleaning the steel cable wasn't the cure? Similar problem here. The cable was dirty therefore, could not gain 'purchase'. Using a solvent to clean the steel cable and then adjusting the knurled friction nut did the trick.