I’ve seen engine mounts/exhaust mounts make noises like that, sounded just like a bearing. I suspect yours is starter drive, but you might wedge a bit of wood between the frame and various mount points and see if it changes.
06 Rincon 680. Foreman headlight conversion, Guru bumper, Warn XT30, Maier guards, Bighorns
05 Foreman 500 FM, 2.5 Warn, Bighorns
Dually Ram and Patio Hauler 5th wheel