2004 Arctic Cat ATVs factory service and repair manual, Page 323Get this manual
16Remove the nut and washer securing the oil pump drive gear to the crank balancer shaft; then remove the gear and account for the pin and the spacer 19Remove the cap screw securing the gear shift cam plate and guide to the gear shift cam; then remove the cam plate and guide
17Remove the gear shift shaft from the crankcase
If servicing of the engineltransmission is due to lubrication-related problem, replace the oil pumpI 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