Got round to sorting the sticky throttle yesterday. First observation: the throttle cable is not PTFE lined, nor is the genuine Triumph replacement, so oiling it is a good idea. You do not oil lined cables.
Next, once oiled, there was nothing wrong with the cable so I have a brand new spare on the shelf. The biggest issue was the twist grip itself. It's funny how you don't notice gradual deterioration until something brings it to your attention. Until I had problems with tickover I hadn't really noticed the twistgrip action was a bit rough. If you are doing yours, just be careful with the heated grip cable; it would be easy to damage it as you take the grip off. Once off, it was a matter of cleaning the bar and the inside of the twistgrip tube. White spirit or a bit of petrol (BE CAREFUL, petrol and electrics are not good partners) will do. Once clean, lubricate the tube and the collar where the twistgrip fits in the switch / cable housing. I used red rubber grease. It only needs a light smear, don't go daft. Too much will only gather dirt. Finally, re-assemble. Test to make sure nothing is sticking and you're done. :icon_biggrin: