The Midnight is a trim of the 2004 Road Star, and Yamaha documented it in the same volume as the rest of the family: part number LIT-11616-RS-00. Your machine's code is XV17AMS.
That book spans 2004 and 2005 and includes the base Road Star, the Silverado and the Midnight Silverado beside the Midnight. Engine and chassis work is identical across them, so the procedures are written once; where the Midnight differs it is in finish and fitted equipment rather than mechanical specification.
Chapters give the maintenance schedule and tune-up figures, then engine removal and teardown with valve train, clutch, primary drive and transmission torque values, fuel and ignition service, charging and starting diagnosis, suspension and wheel work, brake service limits, belt final drive, and a complete wiring diagram with troubleshooting steps.
Use XV17AMS and LIT-11616-RS-00 to confirm fitment before you order.
