Some items from this specific schematic: O-ring 9.5x1.5, Dowel,pin,8x14, Collar, Sensor Assy,tw.
nineteen components are shown in this Nps50 Zoomer 2006 (6) European Direct Sales Kph Cylinder Head (nps505/6) exploded diagram.
The Collar is the cheapest item from this partsfiche.