Parts such as the Cam Chain Tensioner: Bolt,knock,5mm, Spindle,cam Chain, Head,tensioner, Washer, 12mm are included in the Ct50jc Motra Japan Cam Chain Tensioner parts fiche.
The Bolt,flange,6x18 is the cheapest item from this partsfiche.
Of all the components used in this assembly the Chain,cam is the most expensive.