Chainsaw Repair

The first Poulan s-25 I bought in maybe 1974-75 had 1/4" chain which I filed with a 5/32 file .The original was either semi chisel or chipper .

Somewhere in that time period Oregon made round chisel in 1/4" both full comp and skip and would that little saw ever cut using that chain .Ralph Nadar was instrimental in taking it off the market claiming it posed a danger to the owners who were not professionals because it had no anti kick backs .