I'd love to have a wankle powered saw. I just finished ripping my 610 apart today. Someone was in it before me.... I'll have to post up some pics of the one Poston then. Has a little chunk missing out of the skirt of the front cylinder, rear liston has some scoring on it. Found new old stock pistons for it. Pto side bearing had play in it as well. Muffler feels like it's loaded full of crud too, it's heavy as heck. Here's a pic I sent my friend from work. He's an old logger converted to a mechanic. He thinks my saw collection is nuts. Lol.
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Both cylinder had spark, so thank God I didn't have to try and find ignition parts. About half the av mounts are trash. I think I remember randy using a husqy av mount in place of the echo mounts. I'll have to search for his build thread. I'm also considering ditching the hda carb for a wj71, And getting carbon reeds for it. They should have better response. I see lots of potential with these cylinders, but have heard the cranks are weak links. Wishing I still worked at the machine shop right about now. Would be easy to weld the crank pins and have the crank trued. May just get a set of vee blocks and set up an indicator here at the house and see how far out they are. Can't believe they would be out too much. I'll get some better pics up after I have it all cleaned up. It's currently in about 1000 pieces right now.