1990-1998 Arctic Cat Snowmobiles Repair Manual, Page 199Get this manual
cTurn the crankshaft slowly and observe the gauge readingThe maximum difference recorded is crankshaft runoutdIf the runout at any position exceeds the service limit (Tables 2-9), the crankshaft should be serviced by dealer or crankshaft specialistNOTE Do not check crankshaft runout with the crankshaft placed between lathe centersUse V-blocks as described in Step 7
service to qualified dealer or crankshaft specialist
7Check crankshaft runout as follows: aSupport the crankshaft by placing the main bearings at the ends onto two precision V-blocksbPosition dial indicators so that the plungers contact the crankshaft at the specific distances from the ends of the crankshaft indicated in Tables 2-9