Throttle cables

[Redhot]

So, I needed to remove throttle grip tube. Took apart switch housing, and slackened off cable adjustment barrels, there were two on one cable, one of which was slackened at least 15mm of thread.I still had no slack where cables connected to throttle tube ? I just managed to get one off using needle nose pliers, but a real struggle. On my other bikes I've backed off barrel adjustment and that's left slack to pull back and remove. Not looking forward to putting back on. Why Am I having this problem ? The bike runs fine btw.