1985-1995 Polaris Snowmobiles Master Repair Manual, Page 386Get this manual
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CARBURETION 1991 Indy 650
Indy SportlGT
EC44-3PM-Ql Main Jet155 Pilot Jet35 Air Screw12 turn
AltitudeFeet
Jet Needle50P?-3 Cut Away3.0
1000-3000 3000