ok, i have some aftermarket speedo/tach on my 74 cb 550, the speedo is about 10 mph off until you start moving fast, then it seems to even be more off. the tach is dead. was gonna buy new cables and try that, but thinking bout just buying new or used. would the same year different model gauges work? found some cb750 gauges online for cheap, fig. it may be worth it? any suggestions?
