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Post by FrankenMech on Apr 17, 2024 6:17:02 GMT -5
Way too many colors in that room. Being in there for more than 10 seconds would give me a headache.
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Post by milly on Apr 17, 2024 9:14:23 GMT -5
I like it FrankenMech, but then I am weird. I looked up the name of the village and it translates to Llan being church and gwryfon be the thousand virgin's. Saint Ursala and her thousand virgin's. Not even more than about 150 people there now.
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Post by FrankenMech on Apr 17, 2024 11:04:07 GMT -5
That church would not hold 1000 virgins so they must have lived somewhere else. Must have been false advertising... -By the local pub.
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Post by 90GTVert on Apr 17, 2024 13:06:33 GMT -5
I cut a head for a friend. He had a 50mm and a 54mm (actually 53.something). Both with no recess for the squish band/combustion chamber. He wanted one to match an old head with a .8-9.mm recess. I tried to tell him to check first then cut. He said just cut it and he'll check it later, rationalizing that the cylinder and piston look like the same heights as what he had before than needed the recessed head that he brought along so it should be the same with the new stuff. I tried to tell him that's flawed logic. I did at least convince him to leave the 54mm head alone and let me cut the 50mm to 54mm. He didn't realize I could do that. He had sent me a video showing someone cutting a head that was 20-30 seconds long. I've cut heads before on the lathe and using a drill as a lathe with just files to cut before that. I spent a good bit of time trying to at least come close to the angle of the squish band. He told me just cut it straight, it's fine. I cut it to match anyway. After a couple of hours to get it setup and cut, I said there you go... 10 seconds. Looks a lot easier on the internet. Finish isn't perfect, but it's me and a Chinese mini-lathe. The scratch on the original 54mm head is from me trying to check angle by running across it with a tool. I had a dial indicator setup on the tool post and then realized that I can't use it at that angle because the little lathe runs out of range. Setup a dial indicator to go against the carriage to measure how much I was cutting in to make it easier, but then it couldn't fit the space I had either. Came out OK in the end though. I then demonstrated a squish clearance check and gave him a piece of 1.57mm thick solder to use. He messaged me later that it didn't even touch the solder with the head that he wanted cut. I don't know what standard clearance figures are for a 125cc Dio build, but I told him probably 1-1.2mm would be fine just based on 2% of the stroke or so with a little margin for error. Fingers crossed that the non-recessed original puts him in the ballpark. Maybe this will reinforce what I was trying to tell him about check then cut. He also bought a spark plug from me, because the standard head uses short threads. A BR8EG with a 19mm reach looked about perfect to me when screwed into the head. He said later that it's too long, but I have no idea where that came from suddenly unless he means it's too tall because it's a vertical engine and he'd need a stubby plug. No way the crush washer thinned so much that what looked fine to me is not protruding into the cylinder too much for a guy that doesn't sweat any details.
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