2003 Arctic Cat ATVs from 250cc to 500cc Service Manual, Page 93Get this manual
1In order, install the 2nd driven bushing, gear, washer, and circlip onto the driveshaft 2Install the 5th driven gear onto the driveshaft
3Install the second 3rd driven lock washerLock it into the groove closest to the 5th driven gear (as noted in disassembling) by rotating it when it is in the groove
4Install the first 3rd driven lock washer onto the driveshaft making sure the tabs are facing toward the 5th driven gear