Mine has a kienzle tacho in it. Its fine but you need to put a chart it in, don't need to worry about entering anything on it. You. The red light will illuminate if it doesn't detedt a chart or it isn't closed properly, and if you exceed the set speed ( which is alterable) the speed limiter is a separate device which if its got it should kick in at 100kph (62). Tbf its probably fast enough but you could have this taken off.I think you might need it disconnected correctly as it also limits the speed when the red light comes on at , flatout 56mph.