2004 Skidoo ZX Series Service Manual, Page 429Get this manual
Section 08 TRANSMISSION Subsection 07 (GEARBOX)
DISASSEMBLY
Disconnect negative cable from batteryDrain gearbox oil by removing drain plug no1Remove tuned pipe, muffler and muffler grommetRemove battery then, battery rack
Unscrew cover screws no5 as well as reverse axle screw no7Separate cover no6 from housing and move it toward the front in order to disengage fork from sliding gearA32D0QA