In this schematic the "Clip,piston 12mm" is used most often.
The E-7 is made up of components including this Crankshaft Comp. which is the most expensive.
Parts such as the E-7: B/brg Rad N/com, Oil Seal,28x56x8, Pl,conrod Side, Oil Seal,28x56x8 are included in the Mt50s 1981 (b) Belgium E-7 parts fiche.