Parts such as the Rear Wheel (dt400d): Spring, Tension 2462533300 are included in the Dt250 1977 Usa Rear Wheel (dt400d) parts fiche.
The Yamaha REAR WHEEL (DT400D) has one products enlisted in the schematic.
The Spring, Tension 2462533300 is the lowest priced item on this Rear Wheel (dt400d) schematic.
