1971-1973 Arctic Cat Snowmobiles Factory Service Manual, Page 17Get this manual
ENGINE SERVICING (SINGLE CYLINDER) 14Remove the bolts retaining the cylinder head cover and the screws retaining the engine shrouding17Remove cylinder head and gasketNOTE: It is advisable to replace the gasket when reassembling used engine
Both the cylinder cover and head covers can now be removed
To disassemble the carburetor insulator block from the cylinder, remove the two (2) screws and lock washers