You need to screw the in-line cable adjusters fully in so that plenty of slack is created in the cables. Then you can unhook each cable from the drum by turning the nipple through ninety degrees then sliding it out. You might need to use a small screwdriver to help lift the cable off the drum.I would like to revive this thread. I couldn't find anything about this in the service manual. Can somebody please shine some light on this matter? From what I can see, the only thing holding the throttle tube to the ignition assembly is the throttle cable. If I were to loosen the nut on the outside of the assembly would I be able to give slack to the throttle cable and pull out the throttle tube? I'd kill for a step by step instruction to replace ONLY the throttle tube. Please and thank you!