1971-1973 Arctic Cat Snowmobiles Factory Service Manual, Page 99Get this manual
CARBURETION (TILLOTSON) 18Hold intake side of carburetor upward and carefully pull the choke shaft from the main bodyTip carburetor over and allow the choke friction ball and spring to fall from the carburetor body
Assembly
1Position the carburetor with choke side facing upwardInsert choke friction spring and ball into the small hole located over the choke shaft mounting hole