First thing I do is to separate the cable and lever from the actual ders WRT the shifting and der adjustments by not using the levers to control the initial shifting. Pull on the cables, or push the ders. with your hands to set the limits, with no lever influence. Only after the ders shift over the ranges do I move onto the lever aspects.


I then test the lever and upper cable friction by working through the lever shift range with only holding the cable ends. If the slight hand pull/pressure won't result in easy/quick/complete function then you have cable friction (assuming the levers are working properly).


Internal cable routing, casing end caps with seals, casing loops too tight or sloppy, badly seated casing ends wrong cable routing past the anchor bolt and more can effect cause and response of the system. Andy.