The tach on my 92'1100 wanders/bounces around once I get past 6000 rpm. I have Accel coils and Dyna ignition sys. It was never that accurate before the aftermarket parts either. I have checked all connection, and the the bike runs well, so I know it is not wired wrong. I heard a rumor that the tachs are just plagued by a wander needle. Anyone heard of this or know a fix?