OK, good ideas. It would be easy enough to try it both ways. So, let's say rather than an entire tach, I develop a li'l module that allows tachs designed for HDs to read our bikes correctly. Again, there wouldn't be an electrical connection between the tach and the bike, other than +12V. Would that be useful? Is anyone else lookin' at third-party tachs? There's some really fine looking instrumentation out there.
