1983-1985 Original Honda ATC 200X Shop Manual, Page 71Get this manual
CYLINDER HEADVALVES PULSE GENERATOR BASE PLATE
Install the pulse generator base plateTurn the crankshaft counterclockwise and align the "F" mark with the index markAlign the index mark on the pulse generator with the timing mark on the pulse rotor by rotating the base plateTighten the screwsI nstall the pu Ise generator cover