Those cables are not cheap and yes quite a few do get very stiff to operate (takes a lot of effort) some expensive ones last longer than others. Also adjustment of the cable would be quite important, don't know if the shift collar has a detent that locks the shift collar in the locked or unlocked postion, if the shift fork is what keeps the collar in place it will wear rather quickly, I have seen to many shiftcovers with worn forks just from people keeping their hands on the shift lever, believe it or not some shift forks will be worn excesively in a matter of a couple of weeks