Rocksoup
07-19-2006, 09:38 PM
So, I find this 1984 ytm 200E shaft drive on Ebay about a month ago. The seller said it didn't run on count of a seized motor. The trike looked in decent shape from the pics, and I got it for fairly cheap. I picked it up and it was in decent shape, but with a seized motor like desribed. Water got inside and rusted rings fast to the cylinder wall. So I ordered a .50mm over piston kit, gaskets and all the other little odds and ends that it needed.
While waiting for the parts, I decided to try Chainsaw's plastic restore sanding techniques, which works like a charm, and get the trike all cleaned up before reassembly.
I was at the machine shop today while the guy finished boring the cylinder. For some unknown reason, his micrometer that he had on the cylinder while boring, dicided to stick, and not register that he had gone well beyond the target bore size. I woulndn't have believed it if I didn't see it for myself.
So he gets it off, puts the piston in the bore and proceeds to tell me that there's only .003 clearence between the piston and cylinder, which I knew was bogus by the way it sloped around inside the bore. So I get the thing home, slide the rings down in the bore to check ring end gap and find .044 in top ring and .050 inch on second ring. So, I don't think I'm gonna bother putting it together with those readings. I want a re-sleeve and rebore. Hopefully I'll get it.
I just wish there were such a thing as a job gone smoothly. I'll post picks when, and if I ever get it finished.
While waiting for the parts, I decided to try Chainsaw's plastic restore sanding techniques, which works like a charm, and get the trike all cleaned up before reassembly.
I was at the machine shop today while the guy finished boring the cylinder. For some unknown reason, his micrometer that he had on the cylinder while boring, dicided to stick, and not register that he had gone well beyond the target bore size. I woulndn't have believed it if I didn't see it for myself.
So he gets it off, puts the piston in the bore and proceeds to tell me that there's only .003 clearence between the piston and cylinder, which I knew was bogus by the way it sloped around inside the bore. So I get the thing home, slide the rings down in the bore to check ring end gap and find .044 in top ring and .050 inch on second ring. So, I don't think I'm gonna bother putting it together with those readings. I want a re-sleeve and rebore. Hopefully I'll get it.
I just wish there were such a thing as a job gone smoothly. I'll post picks when, and if I ever get it finished.