With a quantity of two pieces, the O-ring(50m) is the most used part in the STARTING MOTOR diagram.
The lowest price component in this Starting Motor parts-list fiche is the Screw, Pan Head(jn2).
The Ttr125ew 2007 1b2k New Zealand 1f1b2-100ea Starting Motor consists of nine pieces with the Motor Assy being the most expensive.