Yes, the R/H magneto on the L/H side of the machine, has a set of Tach points in it. The governor and the engine tach share the same signal. However, the governor needs a very "clean" signal to operate correctly, the tach doesn't really care too much. If your tach points are dirty, pitted or not adjusted correctly, the governor may overspeed the engine or not work at all (have seen both happen in R44's). I have had brand new magnetos from Aviall not provide a clean enough signal for the governor and when switched on, nothing happened. That is when I also learned that regardless of the 44 (12V or 28V) the governor motor is 12 volts. A call to RHC confirmed this. Sorry to ramble on, I hope this all helps.