Chainsaw Repair

55 is a good mid range saw got 10-12 (all open port unfortunately).  I like em.  Better saw than it's replacement the 455 "tank" I have one.  Pulls a 20" OK that's what every body around here wants.  Hey man what you got in a 20".  I like a 16" on mine.  Had a closed a while back unfortunately something came loose and cut up the cyl.   If I remember it was rod bearing.  This was the most worn out saw ever in my posession.  Don't think I even saved the case too cut up around the chain catcher.  Usually do MM and install decomp on 55 Rancher model.  Got one I'm doing a little work on 65-70% intake and ex. open up the transfers a little gonna experiment with shape. 
Shep