Replacing cables

My Li s is all original, trying to keep it that way as much as possible. The cables are pretty worn. Am I going to have to remove the leg shield and other parts to replace them? Would I be able to just replace inner ones only? Still has the grease fittings on the cables. Is there a special grease gun for those, mine doesn't seem to fit.
Need advice
Thanks
Eyeguy
Need advice
Thanks
Eyeguy