Styled in a factory blue finish, the Yamaha Revstar RS420 is a solid-body electric guitar sporting a double-cutaway design with a small pickguard, a nato body, and a maple top. A 22-fret rosewood fingerboard sits atop the nato neck, and the strings are held in place by a tune-o-matic bridge and stop tailpiece. The body features a hidden forearm contour, a deep belly cut, and neck joint, which allows for easier upper-fret access.
For electronics, the RS420 is fitted with a pair of custom-wound VH3, vintage-output humbucking pickups, along with a 3-way selector switch and dual controls for master volume and master tone. The tone knob includes a push/pull Dry Switch, which filters out low frequencies to bring out the punch and clarity of a true single-coil pickup without the hum or hollow tone often associated with split humbucking pickups.