New on the site. Hope this is the right forum. Dad gave me an old XL2 auto two trigger top handle with a 14" bar at Christmas. He kitted the carb and said it ran fine. After usimg it a little, I realized it does not run fine. The more you run it, the worse it gets. Stumbles, loads up, wont idle. Sometimes smokes badly. Figured that last one was the oiler system, as ive heard they can give problems. Seems to be an older unit. Had points. Has been converted to an aftermarket electronic breakerless system. Serial number has been rubbed off the tag, so not sure if its stamped anywhere else. Anyhow, took it apart tonight. Line from oiler pickup to pump is rotten. Replaced that. Replaced vent? Line back to tank. Duckbill valve is missing. Any idea where those can be gotten? Clutch was acting funny, so I took the sprocket and drum off. Not only is the sprocket and inside of drum worn, but the needle bearing fell apart, and I'm seeing some wear on the crank. Looked in the plug hole and exhaust port. Cylinder doesnt look scored. Very smooth. Ring might be worn. Haven't checked compression. Crank has a little side to side movement. Not sure if it should. May need a crank, crank seals, etc. Not sure its worth the trouble. Love the balance of this saw and the double triggers are great! Just wondering how hard and how expensive parts are. Thanks for reading. Sorry this is long winded.