1998-2004 Honda Foreman 450 factory service manual, Page 464Get this manual
TECHNICAL FEATURES OPERATION (at front differential)
12WD torque transmission: Engine
Propeller shaft
Outer ring
CLEARANCE OUTER RING ROLLER RETAINER CAM RING
SECTION AA
24WD torque transmission: When 4WD is selected, voltage is applied to the field coilThis creates magnetic field that magnetizes the rotorThe magnetic force pulls the armature plate against the rotor and rotates the roller reta inerThis moves the rollers from their center neutral position on the cam ring causing them to bind between the outer ring and the cam ring This allows power to flow to the differential and front wheels When power to the fie ld coil is switched off, the switch spring moves the roller retainer to the neutral position for 2WD operation