They are not the easiest and smoothest of shifting. Some say a little "notchy". I just installed my TKO500 (basically the same as TK600) and it takes a little work, but after breaking in over 2700mi. it is much better. I have a mid-shift with a cut down (1 1/4") shift lever I got from **********. I also put an angle of 10deg both forward and to the left on the lever just to make it comfortable for me to shift. Don't make it too short or it will be harder to shift.