Parts such as the E-18: Screw,torx 5x8.7, O-ring,19.8x1.9, Sensor Set, Insulator,inletpi are included in the Nsk50sh Dio/dio Special 2011 (b) Japan Af68-130 E-18 parts fiche.
The most reasonably priced component used on the Nsk50sh Dio/dio Special 2011 (b) Japan Af68-130 E-18 is the Screw-washer,5x12.
Of all the components used in this assembly the Throttlebody Assy is the most expensive.