1971-1973 Arctic Cat Snowmobiles Factory Service Manual, Page 61Get this manual
ENGINE SERVICING (WANKEL KM914B) Assemble the fan (2), magneto flywheel (1) and counterweight flywheel (1), so that the bores coincide with each other, either for 40 Watt or 75 Watt systems, and secure with socket cap screws 15Tightening torque 5.8 8.0 ftIbs(0.8 1.1 kpm)
Loosen the sealing pins (1) from their seat by inserting the tip of the decarbonizing tool into the pin and twistPry the pins outwardRemove the springs under the pins (see page 55, observe paragraph band d)
Disassembling, Decarbonizing and Assembling the Rotor