1971-1973 Arctic Cat Snowmobiles Factory Service Manual, Page 65Get this manual
ENGINE SERVICING (WANKEL KM914B) Magneto IgnitionLighting System
Replacing the Ignition Coil and Lighting Armature The ignition coil and lighting armature are offered as spare partsThe shoes of the cores are so machined that they can be installed onto the base plate without any special apparatusAfter the installation, an air gap must be adjusted between the core shoes and magnets, because the highest ignition and lighting efficiency is only obtained when the prescribed air gap of 0.009 0.013 in(0.25 0.35 mm) is presentNOTE: The mainshaft bearings must be in good condition to obtain an accurate adjustment and reading
Remove screw and stationary breaker pointRemove breaker point lever pivot shaft
Install new parts in opposite row of order and note the following hints: Swage the pivot shaft after screwing it inUse only the prescribed breaker point contact set for the engineThe two breaker contacts should be of equal height and parallel to each other after the installationLubricate the bearing surface (bore) of the movable breaker point with BOSCH grease Ft before installingLubricate the lubricating pad and the cam follower with BOSCH grease Ft (obtainable in tubes at BOSCH repair shops)Ensure that no grease or oil gets on the breaker contacts