Those bikes are very stoutly engineered especially compared to all the vintage stuff I ride. I don't see how this would be a problem. If you're concerned about holding a constant RPM for an extended period then don't. move it around a bit, hold the clutch in on looong downhill runs (a mile or more) and otherwise ride it like a normal motorcycle. Not sure what the mechanism is on the 300 but choking it will typically just get it way rich on a warmed up bike. I don't see how this will help if the bike is properly tuned jetted mapped whatever.