1971-1973 Arctic Cat Snowmobiles Factory Service Manual, Page 86Get this manual
CARBURETION (VVALBRO) 8Replace the low speed mixture needle, packing ring, packing washer, and spring into the hole at the side of the carburetor bodyNOTE: Low speed needle should be installed finger tight only to minimize possible damage to the needle andor seat
Place the metering lever spring into the casting seatReplace the high speed mixture needle packing ring, "0" ring retainer (dished side facing carburetor body), and spring into the hole at the top front third section of the carburetor bodyNOTE: High speed mixture needle should be installed finger tight only to minimize possible damage to the needle andor seat