2004 Ski-Doo Racing Handbook, Page 227Get this manual
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SECTION 072003 MX Zx 440 INFORMATION
NA STD OPT
OPT OPT OPT OPT
505 070 727 505 070 831 505 070 832 505 069 300
861 764 600861 770 300 OPT OPT OPT 5