In this schematic the "Disk,friction (mca)" is used most often.
Parts such as the E-7 Clutch: B/brg Rad N/com, Plate,clutch, Washer,b,spline, Rod,clutch Lifter are included in the Tl125s England E-7 Clutch parts fiche.
The component with the lowest price in the E-7 CLUTCH schematic is the Washer,plain, 6mm.