2008 Arctic Cat 400/500/650/700 ATV Service Manual, Page 265Get this manual
5Remove the 4th drive snap ring securing the 4th drive gear on the countershaft; then remove the first 4th drive washer and 4th drive gearAccount for the bushing CD242
2Remove the 5th drive gear from the countershaft
6Remove the other 4th drive washer from the countershaftAssembling 1Install the 4th drive washer onto the countershaft2Install the 4th drive gear making sure the bushing is in position; then install the other 4th drive washer onto the countershaftSecure with the snap ringCC203D