Clymer manual is very poor when it comes to this and the factory manual instructions sound pretty tricky (having to drill out the pin to get it apart and needs to be right or it can lock things up etc) ....... Look under fork assembly in the Clymer........ I remember just removing it spraying it out and lubing mine without tearing into it years ago. It needs to put back right and the axle clamps too so follow instruction carefully...........Lube the cable first (all of them for that matter) and it could be the speedo itself giving you the problem too.
1978 KZ650 b-2
700cc Wiseco kit 10 to 1.
1980 KZ750 cam, ape springs, stock clutch/ Barnett springs.
Vance and Hines Header w/ comp baffle and Ape pods, Dyna S and green coils, copper wires.
29MM smooth bores W/ 17.5 pilots, 0-6s and 117.5 main
16/42 gearing X ring chain and alum rear JT sprocket.
