2004 650 Twin Arctic Cat ATV Service Manual, Page 186Get this manual
To either engage or disengage the front wheels, move the switch to the 4WD position or to the 2WD position AF682D
2Rotate the adjuster sleeve until 0.5-1.0 mm (0.02-0.04 in is attained738-422A
! CAUTION
Do not attempt to either engage or disengage the front differential while the ATV is moving
3Secure the adjustment by tightening the jam nut; then slide the boot over the jam nut