Prevent Generator Gas Pressure/ Volume Drop with Full Port Valve

I return to a generator I came out for a service call many months ago because it started and stopped short during the weekly test. On that call it did run erratically and I found spider webs in the regulator vent tube. I cleared the vent tube and the erratic operation went away. I am here on maintenance and the generator ran without any faults since I was last here. I noticed that the gas shut off valve is 1/2-inch yet not full port. This is an installation problem, my company didn’t install it yet I have serviced it for years. I had another generator where gas pressure was dropping excessively during start from the restriction the gas cock was creating. Therefore I explain to my customer about how the gas valve is restrictive and it would be best if I replace the gas valve with a full port gas shut off valve/ ball valve. I also replaced most of the 1/2” pipe with 3/4” pipe and replaced the 1/2-inch gas cock with a full port 3/4 ball valve. After replacing the gas valve I had decreased gas pressure drop on start to my generator.