2006 Arctic Cat DVX 400 Service Manual, Page 66Get this manual
NOTE: Check to be sure that the gears all engage normally; then shift the transmission into neutral 7Verify that the two crankcase half alignment pins (1) are in place
2Install the crank balancer shaft3Simultaneously, install the driveshaft and countershaft assemblies making sure the washer is on the countershaft4Making sure the circlip is in position, install the reverse idler shaft; then install washer, bushing, reverse idler gear, wave washer, and thrust washer5Place each of the three shift forks into its respective gear or dog (1) (2) (3) as noted during disassemblingSP226
NOTE: Prior to joining crankcase halves, turn the shift cam to ensure all gears shift properly