View online or download PDF (76 KB) Shimano FD-7970 Service Instructions DURA-ACE Dual control lever * Protectors with a curved adhesion surface and aDURA-ACE. ST-7970. EW-7970 / 7972 / 7973 / 7975, SM-EW79A Obtain and read the service instructions carefully recommend Shimano lubricants and. We strongly recommend only using genuine Shimano replacement parts. • Obtain and read the service instructions carefully prior to installing the parts. If Browse Shimano Dura Ace Di2 RD-7970 owner's manuals, user guides, instructional help documents & operating information to learn more about your product.