Chainsaw Repair

Do not go crazy and "square" the port out. Of course you are right,you must,round the bottom edge to help gently guide the piston skirt back into the bore. I.ve seen so many blown up motors(mostly pistons shattering).this is always the cause,guys who think they can "square out" the port for more size,but it's fatal,put a gentle curve on the bottom edge of the intake,then chamfer it very well! Your engine will last forever while the other guys try to figure out their piston shattering problems...