One should warn up the engine propley to adjust the air/fuel screw but one on/off with the carb will be a nightmare.Piss off i do it my way.I was standing at 3.2 turns but I have noticed fuel consumption is rather high as the is unburned fuel popping in my exhaust when down shifting.I have also checked my spark plug and checked the spark plug gap and also going to clean my air filter e.g.My air/fuel screw is now at 2.6 turns.Still abit ritch but rather safe than sorry .Hopefully that annoying down shifting popping noises stop and my fuel consumption goes down.It reves more crisp and the throttle response sounds way better.We will just have to see.Ther is a extension bit air/fuel screw on the market but difficult to get hold of as the drz400e is not everybody's cup of tea. i be adjusing it to 2,4 turns and i wont be warming up the engine o.k
