1985-1995 Polaris Snowmobiles Master Repair Manual, Page 647Get this manual
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1 Later 1991 Indy 400 and 500 Ignition Timing All 1991 WideTrak and Indy 400XC Ignition Timing 21991 Indy 400XC Jetting Information and Jet Needle "E" Clip Location Change 3 I