2006 Arctic Cat ATVs 400/400TBX/400TRV/500/500TBX/500TRV/650H1/650 V-Twin Service Manual, Page 280Get this manual

2006 Arctic Cat ATVs 400/400TBX/400TRV/500/500TBX/500TRV/650H1/650 V-Twin Service Manual, Page 280

3Install the 3rd driven lock washer (left side)Lock it into the groove closest to the 5th driven gear (as noted in disassembling)
washer (right side), and circlip onto the driveshaft 4Install the next 3rd driven lock washer (left side) onto the driveshaft
making sure the tabs are facing toward the 5th driven gearMake sure the tabs intertwine with the 3rd driven lock washer 5Install