Some items from this specific schematic: Gear,output,low,30t, Gear,input 2nd,16t, Ring-snap,18mm, Gear,input 3rd&4th,20.
The Ring-snap,20mm is the most widely applied product in the KX125-E1 KX125 1986 USA CANADA TRANSMISSION ( six times ).
The most expensive part in this assembly is the Shaft-transmission In.