Model Compatibility: Fits VTR250 INTERCEPTOR, VT250F, VTZ250, VFR400, NC21, and NC24 motorcycles as a direct replacement for the specified application. Part Number Match: Replaces part number 31600-ML0-721 and 31600ML0721 used in the listed motorcycle models. Functionality: Restores voltage regulation and AC-to-DC rectification function as designed for the specified models. Electrical Specification: Matches the electrical output and input characteristics required by the 31600-ML0-721 regulator rectifier in the listed motorcycles. Installation: Designed to mount in the same location and connect using the wiring harness and mounting points of the 31600-ML0-721 unit.