Parts such as the Generator: Washer Plate 648115570000, Rotor Assy, Screw 1, Base, Magneto are included in the T9.9ehx/erx 1999 Generator parts fiche.
This Rotor Assy is the most expensive of the items that make up this Generator assembly.
The most reasonably priced component used on the T9.9ehx/erx 1999 Generator is the Screw, Pan Head(6a8).