- Reproduction of 398cc CB400FOUR-I and II, which were added to the lineup in 1976 with the revision of the driver's license system
- Selectable between CB400FOUR-I with semi-flat handlebar and CB400FOUR-II with standard handlebar
- Features such as frame-mounted tandem steps and side covers are reproduced
- PVC seat, metal springs and laminated assembly type cylinder fins are adopted