(5) Remove sprocket retaining nut. It will be necessary to strike wrench with a hammer to loosen nut.
(6) Give sprocket a light but sharp rap with a hammer near outer edge, being careful not to strike the sprocket teeth, and remove sprocket from shaft taper. Do not lose the two sprocket shaft keys.
b. Install.
(1) Clean shaft taper and taper hole in countershaft sprocket. Install the two keys.
(2) Install sprocket on shaft. Place rear chain on sprocket before installing sprocket cover.
(3) Examine nut lock and, if badly damaged, use a new one.
(4) Install sprocket retaining nut. Tighten by striking wrench with a hammer. NOTE: This nut must be tight. Bend up extension of nut lock against side of nut.
(5) It will be easier to install starter crank spring at this step to avoid interference with sprocket cover.
(6) Install sprocket cover.
(7) Install starter crank.