Fully Restored/Rebuilt RD400 (76-78) Rear Master Cylinder. This master cylinder was completely stripped down, bore lightly honed, ultrasonically cleaned, powder coated, all new seals, rubber, & hardware replaced, and includes a new reservior and hose with clamps. We used as many original Yamaha parts as possible in fully restoring this master cylinder. Ready to bolt on, bleed and go (and stop)! This master cylinder is warranteed by Economy Cycle for one year.