1990-1998 Arctic Cat Snowmobiles Repair Manual, Page 189Get this manual
der wallAfter the cylinder is thoroughly cleaned, lubricate the cylinder wall with clean engine oil
3Oil the piston pin and install it in the piston until the end extends slightly beyond the inside of the boss (Figure 49)
Piston Installation
1Prior to assembly, perform the inspection procedures to make sure all worn or defective parts have been cleaned or replacedThoroughly clean all parts before installation or assemblyNOTE Most engine models have thrust washers (Figure 52) located at the sides of the piston pin bearing
If you are reinstalling the original pistons, they should have been marked to indicate their original cylinder location (PTO, MAG or CEN) and the direction of the exhaust portThe arrow cast into the piston top should point to the exhaust port as described in Step 4