2001 Arctic Cat ATVs factory service and repair manual, Page 132Get this manual
Fig3-376
NOTE: For general servicing, it is advisable to disassemble, clean, and inspect the oil pumpIf any wear or damage is suspected, replace the oil pump
20Remove the circlip securing the oil pump driven gear; then remove the gearAccount for the pin and the washerFig3-379
18Release the tension from the gear shift cam stopper arm springFig3-377
Fig3-380