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| Smoke and Mirrors |
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The right side of the shiney port is the front wall of a secondary transfer. I cut the whole wall 1mm and more in the corners just to get it flush with the iron liner. In a port 15mm wide.
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| I had the top end off once to try one modification at a time. (big mistake) I opened up the exhaust and ran it 1200 miles. 3 exhaust ports were clean but the upper left with bumps and globs in both main transfers looked like this. Yeah go ahead and tell me my carbs weren't right. I think the charge is short circuiting.
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The left port is the boost port in the rear of the bore. It takes a lot of filing along the whole wall to get to iron. Stock the chamfer goes into aluminum. Watch out when you rebore to get a good chamfer so rings don't get in the aly.
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I cut the rear wall of the secondary's 1.5mm and the front wall .5mm on average. That made it 17mm wide or 1mm wider than the 16mm iron liner. I did these cuts on a machining center and then a bunch of hand work to blend it in. I could save a lot of work if I did it again by mapping a finished one.
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You can see the end of the cut in the back of the port and lots of handwork to do.
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Blending it in. |
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Its kind of hard to go diving into a project like this. Like do I really know what i'm doing? I made these cuts on the machining center so your seeing how much casting variation there is. Front side of main transfer.
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