1971-1973 Arctic Cat Snowmobiles Factory Service Manual, Page 38Get this manual
ENGINE SERVICING (TVVIN CYLINDER) 21To disassemble the magneto assembly from the crankcase, remove the two (2) screws, lock washers, and flat washersHolding the magneto assembly in one hand, carefully pull the wires through the grommet24Remove the cylinder head and gasketNOTE: It is advisable to replace the head gasket when reassembling used engine22Disassembly of the intake manifold and the intake cylinder cover from the cylinders is accomplished by removing the six (6) bolts, lock washers, and flat washersNOTE: gasket is positioned between the intake manifold and cylinder cover, and also, between the cylinder cover and the cylinder