Sadiq,
The photos are unfocused (the ground is perfect!) but I have seen a few of these Miyata frames with the holes. And that's what they are; holes. Every one I have seen has the same stress cracks radiating from the holes. Bad idea. Not much you can do except replace the top tube or move on to the next project.
Jay Sexton Sebastopol, CA
Dear LIsts:
I recently acquired a 1988 Team Miyata lugged steel frame. The frame has internal cable routing complete with rubber/nylon cable housing boots. Problem is: there are small cracks in the TT where the cable openings are located. I am told that the previosu owner rode the bike for years and never saw the cracks grow. They appear to be hairline and I can not determine if the cracks are crinkles in the paint evidencing some stress of if they are though...(I am reasonably confident that they are not through the tube).
I have posted pics at:
http://www.wooljersey.com/
-- Sadiq Gill Richmond, Virginia US&A Latitude: 37.58 Longitude: -77.51472