The component with the lowest price in the REAR WHEEL CM400A/T 79-81 schematic is the Nut, Chain.
In this schematic the "Rubber,rr.damper" is used most often.
A sample from the products for the Rear Wheel Cm400a/t 79-81 include: Wheel Comp.,rr., Tube,tire, B/brg Rad N/com, B/brg Rad N/com.