John Ferrell wrote: > > I would think that the distribution of the stress vectors would dictate the > size of the holes. > > I would guess it is not the holes that are important, it is the > size/location of what ever is left? Hi John, please explain, we are fairly smart at most stuff but drilling holes in our expensive race motorcycles is a bit intimidating. :o} I understand that the bit left over is the important bit, so if you were to personally drill holes in your expensive motorcycle's subframe, would you drill a lot of small holes or a few larger holes?? Assuming all the members are square tubing that is exposed to compression/extension forces, and you have to drill the holes yourself in a fairly expensive frame, what are the basic guidelines?? Do you drill mainly in the "middle" of the sidewall, leaving the corners of the extruded square tube for strength, or drill right to the edges of the square tubing for max weight loss?? I've appreciated everyone's input, but really we're the poor fools that have to drill the heck out of something that we then have to ride at 260kph... :o) -Roman -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics