the only improvements to make would be first a thorough tune-up,plugs fuel and airfilter, oil filter change and run a synthedic 15w-40 oil, the speed is what controls frequency, which is controled by governor, you can change the points over to an electronic control from onan, slight adjustments of the air fuel can be done, you need to know how to do the old lean drop method to reach proper setting. also i run the unit dry to not let fuel sit in the carburetor when not used, maybe run with a load and lightly mist water over the ignition system to check for wires or coil arcing causing skips that about all to keep it running in top shape
