Not real likely.

The G series was initially made in Italy and later China. It is the latest series of engines for ST. The S series came before the G series. The only differences between an S series and the SK series was the cylinder head. The S has a barstock machined head, the SK and later G series heads are square and sand cast. There were some carbs that had a oddly machined "dog-leg" guide channel that was easily repaired. I have several engines of that vintage and they all throttle well. I had a G2300 which was made in China and it ran fine. I got it from. Buddy and tuned it myself for him - it started well and throttled nice. I just didn't want any of the Chinese made engines. Just to remove any chance for one of the Chinese' quality off-days, I only wanted Italian made engines personally. I'd take a flawed-carb'd ST from Italy any day over a Chinese made ST. NOT hating or bashing, I just got preferences.