New to the forum. Recently bought pk 2414 with bad motor. Motor blew up and damaged cylinder wall below where the piston would travel. Left a small crack in the wall. Can't seem to find a pk k321 for anything I can afford around here soooo I guess my options are rebuild the motor I have or go with a k321 that does not have the pk "collar". What do you guys recommend? I don't really think the crack would bother but am a little worried about heat and not too worried about not having the collar but do not want to take out the clutch either. Consider any input a help. Thanks.