Thanks to all who replied. I have 2 tachs, one was on my bike when it was wrecked (it needed the glass replaced), the other came from a sportster (redline marked at 6200). The redline on the one from my bike was marked at 5500. I bought my bike after someone "fixed" (and I use that term VERY loosely) it, so I don't know for certain that the tach that came with it is original. I managed to replace the glass and am trying to decide which tach I want to keep and which I should get rid of. The "original" matches the speedometer, the one from the sportster looks real close, but not identical. The "decision" comes into play in that I want to do an ignition swap and possibly cams within the next year. If I do that the sporty would be marked to what the redline is, while the stock one won't. Not that it's any big deal. I just thought I'd explain why I asked the question.
Thanks again.